Stairs.  Entry group.  Materials.  Doors.  Locks.  Design

Stairs. Entry group. Materials. Doors. Locks. Design

» The house is made of non-removable. Construction of monolithic cottages. Advantages of permanent formwork technology

The house is made of non-removable. Construction of monolithic cottages. Advantages of permanent formwork technology

Wooden or brick houses rightfully have an army of fans. But despite all their advantages, they have one very significant disadvantage - their construction cannot be called quick. For those who are thinking about building own home, but at the same time does not have enough time in reserve and cannot boast of great knowledge in construction, all that remains is to choose monolithic method housing construction. The article will focus on houses from permanent formwork.

In order to fill the foundation and walls of such a house, formwork is used. It can be removable (that is, dismantled after completion of work) or non-removable. The second option remains in place after the mortar is poured and hardened, and all external finishing work is carried out directly on top of the formwork.

House using permanent formwork technology

  • Formwork is nothing more than a form. You can remember your childhood games in the sandbox or imagine the housewife pouring dough for cakes into special baking containers. Only unlike the examples given, the form will remain in place, becoming part of the walls or foundation.

Houses made of permanent formwork photo


  • Permanent formwork is assembled according to the principle of a children's construction set from blocks having different compositions. The installation principle resembles brickwork. Structural elements have grooves or special lock-type connections.
  • If it is necessary to fasten opposite blocks, tie ties are used. Vertical reinforcement must be used, and in order for the structure to withstand the pressure exerted on it from the inside by the solution, pouring is carried out in series. In each of the passes, a height equal to three or four rows of blocks is filled with cement.
  • Elements for formwork are made from polystyrene foam or some other materials that promote thermal insulation.

Advantages of using permanent formwork

  • Monolithic structures are strong in themselves. Abandoned formwork creates additional frame, reinforcing the walls of the future house.
  • Monolithic walls puts less pressure on the base, therefore, when developing projects for houses made of permanent formwork, it is possible to calculate the option of increasing the number of storeys of the house.
  • Sound and heat insulation of the home. Foamed polystyrene is an excellent material for insulating residential premises, and its characteristics are complemented by the fact that it perfectly dampens sounds. The construction of permanent formwork is, in its own way, the simultaneous carrying out of insulation and sound insulation work.
  • Less time - less labor costs. When building your own home, you need to save wisely. Renting expensive construction equipment will be excluded from the estimate monolithic house. And you won’t need many voluntary or hired workers. The filling process is fast. This means that workers won’t have to overpay for extra time spent on site either.

  • Space saving. There is never a lot of free space, even inside private houses designed according to personal projects. Monolithic walls are thinner than brick ones, but they protect their owners from the cold no worse, and they save a lot of space inside.
  • Continuing the conversation about savings, it must be said that permanent formwork will allow you not to overpay for heating during further operation of the house.
  • Durability. If you adhere to technology to the smallest detail, then walls formed by polystyrene blocks and concrete will last at least a century.
  • Simplicity of finishing. The blocks create a good, even surface of the walls, which allows them to be finished both on the street side and inside the house without effort and extra costs for leveling the bases.

What type of permanent formwork is there?

Expanded polystyrene blocks for installation of permanent formwork

  • These are hollow elements with walls of varying thickness. The outer side of the material is much larger than the inner side - it will be responsible for maintaining heat in the house. The blocks themselves are strong enough to hold the solution being poured, are non-hygroscopic and affordable.
  • Assembly as brickwork adds strength to the structure, and reinforcement will give additional rigidity to the wall. Reinforcement rods located vertically are overlapped. It is important to choose the right diameter, as well as the grade of concrete.

  • Communications, including electrical wiring, are laid through pre-cut holes in the blocks. All work must be completed before pouring begins. The result is a kind of sandwich, where the “filling” of reinforced concrete is enclosed between layers of insulation.
  • Opponents of polystyrene foam emphasize that this material is not environmentally friendly. But this is rather a matter of choice of manufacturer. Foamed polystyrene manufactured in accordance with all standards and rules does not pose a threat to health. It is enough to note that picky European commissions and examinations have allowed the use of this synthetic material in conjunction with food. Therefore, when purchasing material, you should familiarize yourself with quality certificates and not pursue dubious monetary benefits.
  • But with the vapor permeability of expanded polystyrene, things are really bad. But problems will not arise if you think through the ventilation system well.
  • It is vapor permeable because it is based on cement. The blocks will have to be laid with special glue, tied with reinforcement and then poured. They are stronger than foamed polystyrene formwork.
  • Cement-based blocks are also very diverse. Thus, there are masonry blocks for load-bearing walls, produced in several sizes and modifications; you can separately purchase elements for the formwork of columns, vertical or load-bearing beams ceilings, lintels or strapping belts.

  • This is an invention of Dutch developers. They have been known since the 30s of the 20th century. For their production, large chips of coniferous wood are used (it makes up approximately 80-90% of the total composition of the material). The chips are treated with special additives and held together with a mixture of gypsum, cement clinker and some other additives (Portland cement).
  • The advantages, in addition to environmental friendliness, are obvious:
    • high strength against low weight;
    • vapor permeability;
    • heat and sound insulation properties;
    • weather resistance;
    • frost resistance.
  • Fire safety is achieved through special treatment, and such blocks are also not afraid of rot, mold and pests. They are easy to cut and process. When constructing the formwork, the slabs are placed opposite each other and secured with wire ties. They not only connect structural elements, but also do not allow the wall to deviate from the vertical. Standard material dimensions: 2000 × 500 × 35 mm.
  • They have found other uses: often wood chips - cement slabs used for insulating facades or for building small panel houses at the dacha, designed for living in the summer.
  • The structure will have to be reinforced less. Strengthening will require lintels of window and door openings, columns. And the walls themselves are reinforced with a significant gap of 2.5 or 3 meters (for formwork made of polystyrene foam blocks, the interval is 1 meter). In one approach, pour the mixture, moving around the perimeter, to a height of a meter (two rows). The poured concrete is compacted using the bayonet method.
  • Since the first version of the material for permanent formwork is much more common, it is worth considering the construction technology from polystyrene foam blocks as an example.

Do-it-yourself construction of houses from permanent formwork

So, there is a foundation made in the most suitable way for the given soil. Most often it is a strip base. In any case, it is first covered with a layer of waterproofing material, and reinforcing rods are driven in.

  • The blocks are carefully strung onto the reinforcement and fastened to each other in accordance with the manufacturer’s recommendations (wire ties). Start with the corner elements. It is convenient to stretch a cord between them in order to refer to it when laying out the remaining blocks in the row. There are ridges and grooves at the ends of the material. This type of connection will hold all of the formwork pieces in place. The first layer is the basis of the future building. At this stage, bends are laid internal partitions, openings entrance groups. All engineering Communication are formed immediately. The design feature of the blocks (internal voids) allows you to hide all the necessary wiring inside the walls. We must not forget about ventilation.

  • The second row of blocks is laid offset, like bricks. This dressing will ensure the strength and rigidity of the structure. It is important to ensure that the sides of the stacked blocks match. Be sure to check the level so as not to move the wall away from the vertical. Fixing the blocks of the first and second row is easy. The grooves on the surface of the elements close after light pressure.
  • The laying of the third row of polystyrene foam blocks is carried out similarly to the installation of the second level.
  • Concrete is poured around the perimeter of the area with the erected formwork. It is important to compact the poured mixture well. The small depth of filling with the solution allows you to use a piece of reinforcement for these purposes: they act like a bayonet - they intensively pierce the concrete to get rid of voids, destroying air bubbles. The optimal length is calculated as follows: the height of the block must be multiplied by 3. But purchasing (or renting) a deep-well vibrator will facilitate the speedy completion of work. It will cope much more effectively with the task of compacting the solution. To do this, the diameter of its working part should not exceed 4 cm.
  • Experts advise not to fill with cement upper layer blocks until the very end. If you fill half the outer row, the seam will be hidden inside the polystyrene foam formwork elements. This means the wall will be stronger. Per m² you will need to pour from 0.075 to 0.125 m³ of solution.

Laying the fourth and subsequent rows

  • Laying blocks in subsequent rows has the same algorithm as described. After the sixth row takes its place, the operation of pouring concrete is repeated. It is better to carry out floor formwork with the support of specialists. The technology is like this. In the row of blocks where it is planned to lay floor beams (or floor joists), a recess of the required dimensions is made. The cut fragment should not exceed ¼ of the formwork element. Now the beams are installed in their places and pouring is carried out.

  • Finishing a house using permanent formwork is quite simple. Thanks to the high adhesion of the blocks to the plaster mixture, it will lie smoothly and easily. Roofing V monolithic houses are no different from erecting a roof in buildings built using a different technology.

What can you use to make permanent formwork for your foundation yourself?

If home handyman If he has the strength to be precise, accurate and consistent in his actions, he will be able to make a permanent form for the foundation himself. You will need to choose from several options for suitable material:

  • moisture resistant plywood,
  • cement particle board,
  • flat slate.

All of them are quite durable, resistant to moisture, and elastic. The only indicator that these materials do not possess is thermal insulation. Therefore, you additionally need to purchase something to provide heat (for example, mineral wool). Still needed waterproofing material, fittings, components for cement-sand mixture, a set of coupling screws and nuts for fixing structural elements together.

Cost of building a house from permanent formwork

  • The cost of a monolithic house made of permanent formwork is much lower than a brick or wooden housing option.
  • The price of materials varies depending on the region and manufacturer, but on average you will have to pay from 800 to 1000 rubles for m² of formwork made from polystyrene foam blocks.
  • All manufacturers and sellers calculate the total cost of formwork for free, and the official websites have calculators for making accurate calculations.

House made of permanent formwork: construction technology, Construction portal


Construction of houses Wooden or brick houses rightfully have an army of fans. But for all their advantages, they have one very significant drawback - their construction is not quick.

If you want to learn about houses made of permanent formwork, then read the text of this article.

Information about houses made of permanent formwork

Houses made from permanent formwork are sometimes called thermal houses. During the construction of such buildings, panels and blocks made of polystyrene foam or similar materials are used.

These blocks or panels are assembled into a single frame, which becomes an excellent form for pouring high quality pre-mixed concrete.

After the concrete hardens, the formwork frame firmly adheres to it and turns into a single monolithic structure.

The work of creating polystyrene foam formwork and pouring concrete takes a relatively small amount of time, so the construction period for thermal houses is short.

The advantages of this technology for building houses:

  • fast construction time;
  • ease of creating the frame for future buildings;
  • using low-cost materials;
  • the possibility of erecting buildings without the use of powerful lifting mechanisms;
  • the ability to carry out work in various temperature conditions (down to -10 degrees Celsius);
  • no need to prepare the external walls of the building for construction finishing works;
  • excellent heat saving;
  • the ability to easily divide polystyrene foam blocks into parts to form buildings of various configurations;
  • long service life of the erected structure (up to one hundred years).


Listing the advantages of structures created on the basis of polystyrene foam, it is impossible not to mention their disadvantages:

  • relatively high fire hazard;
  • danger of destruction of polystyrene foam walls upon contact with various solvents and gasoline;
  • weight load restrictions (no more than seventy kilograms per load-bearing wall);
  • possible presence of moisture in the house.

Pay attention to the fact that polystyrene foam is a conditionally non-toxic material, however, when its surfaces are heated greatly (at temperatures above ninety degrees Celsius), it can release substances harmful to humans.

Many of those who use polystyrene foam panels and blocks for the construction of residential or commercial buildings believe that the advantages of such structures significantly outweigh their disadvantages.

If you want to join the ranks of owners of thermal houses, then before starting construction, consider the information received and weigh all the pros and cons, and only after that start developing the project.

Building a house from permanent formwork will not take much time. Moreover, you will spend most of it not on forming the walls, but on carrying out preparatory and final finishing work.

More about projects

Projects of houses made from permanent formwork are quite popular. People who decide to build a polystyrene foam structure understand that this construction technology will help them save money on the purchase of building materials.

It is worth noting that houses built on the basis of polystyrene foam slabs or blocks have high strength and are in no way inferior in this indicator to standard brick buildings.

The design of a house built using permanent formwork does not limit a person in any way.

As mentioned above, this material is easy to cut and can be assembled into various designs, both classic and very unusual.

Having decided to build a house based on polystyrene foam, you will be able to create exactly the layout of the premises that you dreamed of.

At the same time, you can make changes to the project not only at the stage of its approval, but also at the construction stage, when you do not like this or that format of the room.

Presented on the Internet a large number of house projects that can be created from polystyrene foam.

You can exactly repeat any of these projects, focusing on the size of rooms and other premises, or you can make certain changes to it in order to find a home created exclusively for your needs.

Expanded polystyrene is a malleable material that can be easily processed with sharp knives or saws. Using these items, you can shape the material into any shape you want.

The average thickness of the walls of a house built from polystyrene foam is twenty-five centimeters.

The thickness of the walls of a house built of brick can reach up to sixty-five centimeters. At the same time, the level of heat saving for these houses will be the same.

Therefore, using polystyrene foam to construct a building, you can increase the useful volume of each room of the house by at least thirty centimeters from each wall.

Owners of polystyrene foam houses are also pleased with the fact that they can use absolutely any materials to decorate their buildings.

If you are a fan of the classics, you can cover the polystyrene foam with a layer protective film and cover it with one layer of brick to create the appearance of a solid brick house.

For the same purposes, you can use treated wood and decorative stone panels.

Lovers of simplicity and modernity can decorate a polystyrene foam house with metal or plastic siding.

Remember that during finishing work you will not need to use Additional materials, used for wall insulation.

A house built on the basis of polystyrene foam retains forty percent more heat than a classic brick house of the same configuration.

Technology of working with polystyrene foam

The material, called expanded polystyrene, was created in the second half of the twentieth century by German scientists.

After they studied its properties, polystyrene foam began to be used in the construction of new buildings and in the insulation of existing houses and public facilities.

Initially, only polystyrene foam plates were produced, but over time, factories began to create blocks from this material, hollow inside, making it easier to fill them with concrete.

For ease of assembly of blocks and plates made of polystyrene foam, manufacturers equip them with special fasteners that allow them to be assembled into a single structure.

To begin building a house based on permanent formwork, you should purchase the required number of panels and blocks made of expanded polystyrene and assemble them into a single structure.

After the structure has been assembled and fixed, it should be filled with prepared concrete mortar and wait until it hardens completely.

Concrete is a popular material known for its thermal conductivity and high density.

If you are building a house from polystyrene foam in a cold climate, you can neutralize this disadvantage of concrete by covering outside of its construction with an additional layer of insulation, for example, cotton wool.

For buildings erected in a temperate climate, a layer of concrete and a layer of polystyrene foam combined into a single structure will be more than enough.

Expanded polystyrene is rightfully considered an excellent thermal insulator, as it has a low level of heat conductivity.

What buildings can be built using polystyrene foam?

In fact, many:

  • dachas, cottages, private houses;
  • low-rise apartment buildings cascade type;
  • houses with large number of storeys;
  • utility rooms or rural buildings (for example, chicken coops, animal pens, etc.);
  • various sports complexes (including indoor tennis courts, gyms, swimming pools, ice arenas, etc.);
  • public premises for various purposes.

Reduce fire hazard of this material possible by using special layers that protect polystyrene foam from possible fire.

Please note that the thickness of such layers must be at least thirty millimeters.

How to build a house from polystyrene foam?

The construction of an expanded polystyrene structure is reminiscent of the construction of houses that are erected in accordance with reinforced concrete monolithic technology.

The basis of such a house is polystyrene foam blocks of standard sizes.

Typically, the sizes of blocks that can be purchased on modern construction markets are one hundred centimeters in length, twenty-five centimeters in width and twenty-five centimeters in depth.

Each of these blocks is equipped with a special locking mechanism that allows them to be assembled into uniform designs like playing Lego.

The structure assembled in accordance with the project will be the actual walls of the building. Expanded polystyrene blocks have special cavities inside into which concrete should be poured.

To increase the reliability of such a structure and make it static, during the installation of polystyrene foam walls, special metal reinforcement is placed inside them.

The diameter of this reinforcement can be different: the higher the number of storeys of the building, the stronger and more voluminous it should be.

After the installation of the reinforcement is completed, the resulting structure is temporarily fastened with a special tie wire, which allows it to remain static. Concrete is poured into polystyrene foam blocks at this stage of building a house.

If you complete all the initial stages of building a house from this material in full accordance with the technology of its use, you will receive a guarantee that the created frame will easily withstand all the necessary concrete floors that have a significant weight.

The maximum number of floors of a building constructed from permanent formwork should not exceed nine floors.

That is why not only private low-rise buildings, but also multi-apartment buildings are often built from this material.

Modern polystyrene foam blocks are created from granular material and undergo specialized factory processing, which makes it possible to increase its fire resistance several times.



In addition, plates and blocks made from this material have a long aging period, almost do not rot and are not deformed from light impacts.

An undeniable advantage of polystyrene foam is the fact that, unlike many other materials created in chemical laboratories, it has no odor.

As stated above, external finishing polystyrene foam structures can be of any kind. This also applies to interior decoration.

If you want to build your house from this material, you can cover its walls from the inside with either a thick layer of plaster, tiles or plasterboard.

After reading this article, you were able to learn about the specifics of houses built from polystyrene foam materials.

If you are interested in this topic and want to build a house from permanent formwork, then carefully consider all the pros and cons of this design, and only after such an analysis make a decision on construction.

If you want to quickly and cheaply build a house in the Moscow region, our builders will come to your aid. At modest prices, according to calculations, monolithic workers will build any house (or other structure) on your land plot in a short warm season. Services are provided only by specialists who have undergone special training.

The cost of building a house using permanent turnkey formwork for 1 m2 is 22,000 rubles. with materials.

Technology for installing permanent formwork

Construction technologies using permanent formwork became widespread abroad about 15 years ago. In Russia they began to master it much later. The idea of ​​the work is that there is no need for additional work by masons to remove formwork after hardening of monolithic walls.

The formwork serves not only as a frame, but also as thermal insulation, and sometimes external cladding walls The installation of permanent formwork does not require additional reinforcement: the reinforcement is placed in blocks in the factory.

The technology for installing permanent formwork is simple. The individual blocks are connected to each other using the simplest lock connections along pre-calibrated perimeters. Next, the permanent formwork is poured with concrete.

In the presence of quality solution The construction of the walls of the house by a team of four workers will take no more than two weeks. For the successful construction of walls and installation of partitions from permanent formwork, the most important thing is to carefully prepare the bed (the surface of the foundation or ceiling made of a monolith), accurately align the horizontal position along the line of filling the walls. The surface must be perfectly smooth to avoid waterproofing ruptures.

How to build a house in such a way that you don’t waste too much on materials and maintain high quality performance characteristics? Constructing the walls of a house from permanent formwork is an excellent solution for those who are not afraid of experiments and follow the latest developments in the world of construction technologies.

Here are just a few key advantages of this type of design:

  1. Easy to use and time saving. Wall installation reminds the children's designer: the main guide blocks are set, onto which the next level of blocks is installed in the grooves, and so on until the required height is fully reached.
  2. High mechanical strength, resistance to possible adverse natural phenomena(earthquakes, landslides, etc.). Reinforcement is tied inside the block structure and in the corners, the structure is filled with high-strength cement mortar, thereby creating a complete monolithic wall with a high threshold of resistance and stability.
  3. Does not require additional insulation or sound insulation. Due to the fact that polystyrene foam itself is a thermal insulating and sound insulating material, the walls of the house perfectly retain heat, “breathe” and do not muffle noise.
  4. Savings on heating appliances and heating bills. It has been proven: a house made of a permanent structure has better energy-saving properties than a house with walls made of two bricks (on average by 30%).
  5. The material is not susceptible to attacks by fungus and mold.
  6. Ideally amenable to any processing, due to which it is possible to use almost any finishing materials both for building facades and for interior decoration.
  7. High-quality performance characteristics are maintained for years, and the service life of the object is unlimited.

If you are interested in an offer valid throughout the Moscow region, contact our specialists, find out how much permanent formwork costs and the total cost of the work.

Formwork is a kind of form for a cement-sand mixture, which allows you to form the correct geometry of the walls. Builders use both removable/temporary and permanent/permanent formwork for the foundation. The second option allows you to save effort and time on dismantling work, as well as insulate and/or strengthen the walls, so it is increasingly used not only in industrial, but also in private construction.

Basic requirements for permanent formwork for foundations

Let's consider what properties permanent formwork should have.

  • Moisture-proof material and tight seams. In the absence of this characteristic, the formwork will allow concrete to pass through, which will lead to excessive consumption of the mixture and make it impossible to construct the wall.
  • Structural strength. This is necessary so that the formwork can withstand the pressure of the concrete mixture from the inside and the earth from the outside (at the foundation level) without deformation or cracking.
  • Correct element geometry. It would be impossible to build with blocks of different thicknesses or with irregular angles. smooth walls and 90-degree joints between them.
  • Long period of operation. The longer the formwork can potentially last, the higher the likelihood of a long life for the entire house. If the formwork collapses quickly, the unsupported walls may not be able to withstand structural loads. In cases where the formwork does not have load-bearing properties, its destruction will lead to deterioration appearance due to delamination decorative finishing facade.

Permanent formwork - important element energy efficient house

Table: advantages and disadvantages of permanent formwork

AdvantagesMinuses
Ease of construction, the final result depends less on the skill of the workers (compared to homemade removable formwork).In houses with permanent formwork it is often observed high humidity, which forces you to equip a powerful ventilation system.
Good heat and sound insulation (compared to buildings made of brick and reinforced concrete slabs).The impossibility of construction in the cold season, since a large mass of concrete hardens poorly at low temperatures.
Ease of finishing work thanks to flat surface formwork without cracks and differences in wall thickness.The need to additionally moisten the concrete during hot periods to prevent cracking of the walls.
Reduced construction period compared to houses made of brick, stone, and gas blocks.Buildings with metal reinforcement frames must be grounded as quickly as possible to avoid exposing people to the risk of lightning strikes.
The durability of buildings with reinforced concrete formwork is 300 years or more.Difficulty in dismantling during alterations and reconstruction, especially if fill reinforcement with metal rods was used.
The technology is suitable for the construction of buildings of any size and number of floors, from summer houses to shopping complexes.In case of fire, the formwork material can release harmful substances.
Minimization of construction waste (compared to construction technology with removable formwork).If the external treatment of polystyrene foam blocks is insufficient or incorrect, water, insects, and small rodents may enter the walls.

Fixed metal formwork

To ensure uniform wall thickness, sheets of metal formwork are connected with metal studs

Metal formwork is one of the most expensive, therefore it is used mainly in industrial construction. It is made from sheets of aluminum or steel 1–2 mm thick on a metal frame and connected with anchors, plates or locks. The type and number of fasteners are calculated in such a way that when concrete is poured and hardened, the sheets do not bend either inward or outward.

When the formwork is made to order for a specific building, the manufacturer’s craftsmen themselves carry out a test assembly of the structure and only after confirming the suitability and completeness of all parts, the order is sent to the buyer.

Metal formwork has the most accurate geometry. Tolerance in parallelism of the sheet edges - no more than 2 mm over 1 m of product length.

In order to prevent premature oxidation and destruction of the metal due to contact with concrete and groundwater, sheets of future formwork are carefully coated with paint and lubricant in production. Often galvanized steel is also used, or the method is used powder coating, which forms a dense polymer film on the sheet. But if welding is used during installation (welding sheets to a frame or reinforcement to sheets), areas damaged by temperature will need to be re-applied. protective composition(lubricant, mastic, paint).

Powder coating of metal sheets is one of the most effective methods of protecting them from corrosion

Metal is well suited for buildings with complex geometries, since thin sheets can be easily bent at any desired angle, made into a curve or an arch. Finished walls They turn out very neat and smooth; if desired, they can be left without decorative finishing. Architects recommend using metal formwork in areas with complex loose soils.

To prevent concrete from leaking, the joints of metal formwork are connected especially carefully.

But experts also note some disadvantages of metal formwork:

  • significant weight of steel sheets, which requires the use of special equipment;
  • the need for additional thermal insulation of walls and foundations;
  • The grease on the sheets wears off easily and stains workers.

Installation of aluminum sheets for wall formwork can be done by a couple of workers

Aluminum sheets with the addition of silicon, which weigh much less than steel sheets and do not require protection from the external environment, will help minimize labor costs for transportation and installation of metal formwork.

Permanent formwork made of reinforced concrete blocks

Reinforced concrete formwork blocks are recommended for large construction projects, at least a three-story private house. Since they have increased strength characteristics, in smaller buildings such a safety margin will be unnecessary. Thin-walled blocks are excellent for arranging the foundation of a permanent fence.

Reinforced concrete formwork blocks are installed offset

Reinforced concrete formwork blocks have the following advantages:

  • allow you to save cement-sand mortar due to the significant wall thickness;
  • suitable for the construction of basements of any depth, as well as interfloor ceilings;
  • mounted with a minimum joint width;
  • provide a building service life of several hundred years.

The best formwork is made from reinforced concrete blocks with indicators F75 (frost resistance), W4 (water permeability), 6% (water absorption), 350 kg/cm 2 (mechanical strength).

An example of the arrangement of reinforcement in formwork made of reinforced concrete blocks designed for two rods

The disadvantages of reinforced concrete blocks include:

  • heavy weight (a 510x400x235 mm block weighs 30 kg), due to which it can only be transported by trucks and installed only by workers with a crane;
  • high price - about 500 rubles per unit.

Expanded clay concrete blocks do not have such disadvantages. Providing high strength of the walls, these analogues of reinforced concrete blocks do not require insulation of the house, since they already contain insulation - expanded clay.

Fixed plywood formwork

For formwork, moisture-resistant plywood is most often used, but even then, this material is usually used to create a temporary form. After all, the service life and weather resistance of a laminated plywood sheet are an order of magnitude lower than the same parameters of a concrete wall.

Permanent plywood formwork is acceptable in the following cases:

  • when making a temporary structure (for example, a small house in which the owner lives during the construction of the main house);
  • during the construction of non-residential buildings (chicken coop, barn, wood storage);
  • when it is necessary to save as much as possible on construction;
  • if the walls and foundation are insulated along the outer contour and the plywood is completely protected from external influences.

In addition to questionable durability and strength, plywood formwork will require a lot of labor and careful handling. Since the sheets do not have a tongue-and-groove system and special joints, you will have to assemble the structure using self-tapping screws, additionally seal each joint and make an external sheathing with supports (so that the plywood does not bend). In addition, non-waterproof plywood swells and flakes from water, while laminated plywood repels the concrete mixture and never forms with it. monolithic wall, so it is very important to find a waterproof material with good adhesion.

Technoblock - an example of the successful use of plywood in formwork

Designation in the picture:

  • 1 - decorative facing layer;
  • 2 - layer of insulation;
  • 3 - plastic supports for reinforcement;
  • 4 - concrete pouring (a cavity is provided for it in the block);
  • 5 - plywood sheet.

As a result, despite the cheapness and environmental friendliness of plywood, experts recommend using it only for temporary formwork. For permanent applications, it is better to use a technoblock - a composite product with an inner plywood layer.

Fixed wood concrete formwork

Arbolite is a relatively new, but time-tested material. Formwork blocks from concrete and wood chips began to be made recently, but this mixture was used for floor insulation back in Soviet times. Arbolite blocks are much cheaper and lighter than reinforced concrete, so they are actively used in individual low-rise construction.

Some models of wood concrete blocks have a layer of insulation - stone wool or polyurethane foam

Compared to other types of permanent formwork, wood concrete blocks:

  • are easily cut with tools for working with wood, which allows you to adjust them on site to the required parameters: cut corners, make arched curves, cut out fragments for better adhesion of walls at the corners of the building, reduce height/length;
  • can be installed quickly and without special equipment (1 m2 of wall is only 8 blocks);
  • provide high strength, sound absorption and thermal insulation with a smaller wall thickness (compared to brick and expanded polystyrene);
  • safe for the health of others, waste can be industrially recycled;
  • strong enough for fastening clamps for drainpipes and loaded elements of façade systems (guides for hanging siding, etc.);
  • are not afraid of fires (withstands up to 90 minutes of open fire);
  • frost-resistant, suitable for regions with harsh climates.

The disadvantage of wood concrete is its water permeability, so it is recommended to use it for the construction of walls on a ready-made waterproofed strip or slab foundation. The use of wood concrete for arranging the foundation is undesirable, since it will need to be very carefully protected from moisture.

An example of arranging formwork made of wood concrete and brick

Arbolite is produced in the form of hollow blocks and panels. In the second case, the panel serves only as the inner contour of the wall, and the outer one must be made of brick. The cavity between the materials is filled with concrete and reinforced, as when using other types of formwork. This option is more difficult to install, but ready house it turns out warm (arbolite), beautiful (brick) and durable (merging the strength characteristics of three materials).

When purchasing wood concrete blocks and slabs, pay attention to the eco-label, as some manufacturers use binders that are harmful to health (phenol, naphthalene). Be careful, plasticizer toxins can be released from the material even at room temperature.

Manufacturers of wood concrete blocks for formwork offer options for both high-rise buildings and small buildings. Be sure to consult with a consultant so as not to spend extra money on concrete for pouring thin-walled blocks or not to mistakenly take blocks with too small voids.

Fixed formwork made of CBPB

CSP (cement particle board) or sawdust concrete is another variation of a mixture of cement and crushed wood. It differs from wood concrete in the type of binder component and the addition of sand. Therefore, DSP is a denser, stronger and heavier material, and its thermal insulation is worse than that of wood concrete.

Cement particle boards can serve finishing material when covered with decorative mineral chips

Among the advantages of wood concrete formwork:

  • the material breathes, so there is no need to equip the house forced ventilation and combat the greenhouse effect in other ways;
  • DSP is able to withstand fires, its fire resistance is confirmed by laboratory tests;
  • the plate consists of natural materials, therefore does not harm nature and health;
  • gives the house high strength: with a thickness of 25 cm, the wall can withstand three times greater loads than a brick wall of the same thickness;
  • DSP is resistant to sudden temperature changes, therefore suitable for regions with a sharply continental climate;
  • the material is sufficiently stable and geometrically stable so that the distance between the floors can be 2.8–3 m;
  • it is possible to build houses using cement particle boards even in winter, as long as the temperature does not drop below -20 o C;
  • DSP requires minimal finishing; inside the house it can be painted or wallpapered without putty.

An example of creating reinforced formwork for a foundation made of cement bonded particle boards

European builders have been using permanent DSP formwork for more than 25 years, so there are many houses that confirm the durability and reliability of this material. Cement particle boards are well suited for both individual and multi-storey buildings, even in the harsh northern climate.

Fixed formwork made of corrugated sheets

Profiled sheets, corrugated sheets or corrugated sheets have also found their use as permanent formwork, although much more often they are used for the manufacture of fences, roofs, and outbuildings. Important: profiled sheeting is only suitable for arranging composite slabs of interfloor floors and for large spans (from 5 m) it requires additional temporary supports. This material is not used for the construction of walls due to its small thickness, which reduces its resistance to mechanical loads in a vertical position.

An example of a floor design with a base made of profiled sheets

Builders are attracted to formwork made from this material with the following features:

  • the metal is completely protected by galvanization and/or a polymer layer, so it does not rust;
  • V industrial buildings the material can be left without decorative finishing, the ceiling is visually pleasing and practical;
  • The corrugated sheet not only serves as a form for concrete, but also serves as sheet reinforcement;
  • corrugated sheeting transfers the load to the metal frame of the building, so the internal walls do not bear heavy loads and it becomes possible to save money by constructing them from lightweight materials (aerated concrete, sandwich panels);
  • sheets of small thickness are simply cut with metal scissors; formwork of any shape can be created from them.

To ensure good adhesion to concrete, choose special corrugated sheets with teeth for the formwork.

This is what it looks like interfloor covering based on corrugated sheeting from inside the building

Permanent formwork made from corrugated sheets is used mainly in industrial construction, as it requires construction metal frame buildings and metal beams ceilings It is not suitable for an individual home, as it will be unreasonably expensive.

Fixed polystyrene foam formwork

Expanded polystyrene/foam is the most popular material for permanent formwork. Its demand is explained by factors such as:

  • light weight, making it easy to transport;
  • tongue-and-groove connection system for the simplest possible installation;
  • speed of installation (foam blocks of permanent formwork are larger than concrete ones, so work progresses faster);
  • variety of types (reinforced, with protective impregnations);
  • thermal insulation properties, thanks to which the house does not require additional insulation;
  • soundproofing;
  • biological inertness, preventing the development of mold, moss, etc.

Examples of polyurethane foam formwork blocks of different configurations

Opponents of polystyrene foam formwork point to its danger in case of fire and low degree of environmental friendliness. Even if you buy materials labeled eco, this does not guarantee that the formwork will not harm your health or the environment.

It is also important to keep in mind that foam formwork will be a good choice for buildings of simple shape, since the range of corner and rounded blocks does not yet allow satisfying all consumer needs.

Fixed formwork made of glass-magnesite

Glass-magnesite sheets or FMS have been used as permanent formwork since the mid-20th century for the purpose of constructing thermally insulated houses. The material consists of a mixture of magnesium oxide and chloride, perlite, sawdust, fiberglass and polypropylene fabric. Not all components of glass magnesite are natural, but the finished composition is completely safe for people.

Different options for glass-magnesite sheets with decorative finishing

LSU - great option for the construction or reconstruction of a house with a weak foundation. Since the sheets themselves and those used for filling are lightweight concrete mixtures weigh much less than bricks, reinforced concrete blocks and others traditional materials, they do not load the structure of the building so much.

Among the advantages of glass magnesite:

  • multifunctionality: it is suitable for creating foundations, walls, ceilings, fences, etc.;
  • high thermal insulation, which is associated not only with the properties of the formwork itself, but also with the advantages of the filler (fiber foam concrete grade D250-D320, concrete with polystyrene foam balls M300);
  • fire resistance;
  • complete moisture resistance, which makes the material suitable for the construction of baths and saunas, use in areas with a humid climate and in wetlands;
  • the small thickness of walls with SML formwork will save space inside the house;
  • the rough surface of the sheets can be easily covered with clinker tiles, decorative plaster or any other finishing material;
  • the sheet can be slightly curved if necessary for the construction of a half-turret or other home decoration (radius of curvature - 3 m).

If you plan to cut LSU boards on site, purchase spare jigsaw blades. This material wears out nail files several times faster than wood concrete and plywood.

Glass-magnesite sheets will be suitable for use at all stages of house construction

Glass-magnesite sheets, like arbolite sheets, often form only the internal contour of the formwork, while the external one is most often built from decorative brick. As a result, external finishing turns out to be unnecessary, and a thin layer of putty will be enough inside. The technology is suitable for the construction of houses up to 5 floors on a ready-made strip/slab foundation. In addition, it requires more time and effort than using polystyrene foam or DSP formwork (excluding decorative finishing).

Glass-magnesite sheets are currently produced only in China and Korea, and LSU quality control is also carried out there. There are no domestic analogues for this material.

Instructions for installing permanent formwork from prefabricated blocks

We will consider the technology of constructing a foundation from ready-made hollow blocks using the example of lightweight concrete products. Unlike reinforced concrete blocks for high-rise buildings, these “bricks” can be installed by hand without a crane or manipulator.

  1. Prepare a cushion for the block foundation by filling and compacting layers of sand and fine crushed stone. A thin screed should be poured over the cushion to simplify further laying of the blocks, and also to avoid concrete leakage when pouring the foundation.

    The sand and gravel cushion must be covered with a thin layer of concrete before installation.

  2. Stretch a thread along the trench and place the first layer of blocks on the cushion, being careful not to deviate from this guide. It must be mounted so that the gap between the elements is minimal. If the gap increases significantly along the trench, the reason may lie in the unevenness of the cushion. In this case, the row needs to be disassembled and a more even base made.

    Thanks to the correct geometry of the blocks, the foundation strip is smooth and clear

  3. Connections between walls should be provided with special blocks of slightly longer length. If there are none, a recess should be made in the universal blocks, as in the picture. This will ensure reliable adhesion of the perpendicular foundation strips.

    At the junctions of internal and external walls you need to place special corner blocks

  4. Place metal or fiberglass reinforcement. For low-rise construction Two parallel rods are enough, but if necessary, three can be arranged.

    The blocks have special grooves for reinforcing rods

  5. At the junction of the walls, the rods must overlap so that the length of the free end is at least 2 cm.

    Pay attention to the location of the upper and lower rods in relation to each other, they should form a regular square

  6. When the length of the rod is not enough, it can be increased by tying a new rod with a special thin wire. It is advisable to make 2-3 dressings in different areas of the overlap.

    The reinforcement should be tied with an overlap of 15–20 cm

  7. Place the second row of concrete blocks exactly on top of the first. Do not allow even small deviations; if necessary, adjust the position of the block with a mallet.

    Install the second row of hollow blocks on top of the first

  8. Fill the prepared formwork with liquid cement-sand mortar so that the concrete level does not reach the grooves for the reinforcement.

    The concrete level should be slightly higher than the middle of the top row of blocks

  9. Before the concrete begins to dry, try to expel excess air by piercing the space inside the formwork with a reinforcing rod in a downward motion. After this, place the reinforcement vertically, especially carefully strengthening the external corners and wall joints.

    Vertical reinforcing bars can be installed individually at a distance of 1.5 m from each other

  10. After the concrete has dried, begin building the foundation. Install and tie the reinforcement, install two new rows of blocks and fill the formwork with concrete. Continue this until the foundation reaches the height you want.

    New reinforcement is installed on top of the concrete screed

  11. The last row of foundation blocks is poured until a smooth horizontal surface is formed. While the concrete is still wet, you can level it with a small board or a long plaster trowel.

    The foundation is ready for the construction of the walls of the future house

A foundation made of concrete hollow blocks for a private house using the described technology is installed by two workers in 2–3 days, taking into account the time for the first layers of concrete to set.

Comparison of costs for creating a foundation from full and hollow reinforced concrete blocks and monolithic with temporary formwork

A comparison shows that a foundation made of hollow concrete blocks is 18% cheaper than a foundation made of solid ones and 36% cheaper than a strip monolith poured using temporary wooden formwork. This is achieved by saving on the amount of reinforcement, reducing labor costs, the amount of concrete, etc. But constructing walls from reinforced concrete blocks will be too expensive (compared to polyurethane foam, wood concrete), it is better to use it only for the foundation.

Making permanent formwork with your own hands

Let's consider the process of creating permanent formwork from sheet materials with independent cutting using the example of EPS (extruded polystyrene foam).

  1. Unfold the sheets into fragments corresponding to the width and length of the compacted trench. From the leftovers, cut out strips for sides 20–25 cm high. total length the sides must correspond to double the perimeter of the trench + 20% for overlap at corner points.

    You can cut sheets of polystyrene foam not only with power tools, but also with a hand saw

  2. Place the sheets in the trench so that the sides rest on the EPS layer and do not touch the ground. Secure the sheets at the corners by piercing the material with plastic ties of the SVT system.

    When laying EPS sheets in a trench, try to minimize the gaps

  3. Place the halves of plastic ties between the vertical sheets and secure them together. If the system does not click tightly enough, tighten the connections with pliers.

    Plastic ties are easy to install by hand

  4. Install reinforcing bars above and below the horizontal ties. To ensure that the metal is embedded in the thickness of the concrete, place pieces of polystyrene foam under the rods. Special grooves on plastic ties will help maintain the same distance between the reinforcement bars throughout the entire foundation.

    Both metal and fiberglass reinforcing bars are suitable for reinforcement

  5. Tie the rods together with thin wire, folded 2-3 times. In the same way, the reinforcement can be tied to plastic ties.

    Installed reinforcing rods must be tied with thin wire; welding is not allowed

  6. Build up the foundation with whole sheets of EPS, having previously attached narrow strips of the same material to them using plastic clips. Place the prepared sheets as shown in the figure. When installing, pay attention to the location of the grooves and ridges on the sheet.

    We begin to increase the height of the foundation

  7. Attach the vertical sheets to each other with ties, install and tie the reinforcement using the technology described above. You should get at least two plastic reinforcement belts, approximately at a distance of 10 cm from the top and bottom edges of the sheet.

    Plastic spacers between the plates are installed in the same way

  8. Attach locking plates to the sharp ends of the plastic ties and trim off the ends that remain free.

    Protruding tails of ties can be easily trimmed with pliers

  9. Fill the reinforced formwork with cement-sand mortar. To prepare concrete, you can use your own concrete mixer, but you will need a lot of solution. If you doubt that you can pour the entire foundation in a day, it is better to use the services of an industrial concrete mixer tank.

    Filling the finished foundation with concrete

  10. Remove air bubbles with a construction vibrator and level the concrete surface. In this case, it is impossible to expel the air with a reinforcing rod, since the metal will damage the formwork, easily piercing the EPS sheet.

    The upper plane of the concrete layer should be at the level of the outer layer of the formwork

After the foundation concrete has completely hardened, you can continue pouring the walls using the same technology, but such a foundation can also be used with other materials.

Video: technology for building a house with permanent formwork from particle blocks

When giving preference to one of the options for permanent formwork, consider not only your financial capabilities and labor costs, but also its purpose. For example, in areas with swampy soil you should not use blocks based on wood chips, and in cold regions you should pay attention to a material with a minimum thermal conductivity coefficient. In this case, you can quickly build warm house without extra financial costs.

Nikolay himself is building a private house in Samara. He told us how to save space on a plot of land only 12 meters wide by using universal ties for TECHNONICOL permanent formwork.

Background and technical data

Construction objects on the site: bathhouse - 35 m2, house - 110 m2.

Problem: land plot very small in area, you need to save every meter.

Solution: construction of the foundation, plinth, walls of the bathhouse and two-story house using insulated permanent formwork using universal screeds to reduce the thickness of the foundation and walls.

Contractor: There is no contractor; we hire specialists for construction under our own supervision.

My name is Nikolay, I am a private developer from Samara. My building plot of land is very small - only 12 meters wide. I know no more about construction than you do, but I decided to do everything with my own hands with the help of hired workers.

When choosing materials for constructing the foundation of the house and bathhouse, I relied on knowledge obtained from various sources. And, interestingly, the arrangement of permanent formwork using universal screeds was not initially discussed at all. Just for insulation external surfaces I purchased extruded polystyrene foam XPS TECHNONICOL CARBON ECO, and ties came in addition to it. After reading about the properties of screeds and the method of installing them, I decided that this would be best choice in my case.

Why did you choose permanent formwork?

Just imagine that without permanent insulated formwork and universal screeds, I would have to build walls about 1.2-1.5 m thick and lay a very strong and more expensive foundation. Our winters are frosty and thinner walls would lead to greater heat loss and energy consumption. Or, in an attempt to save on energy spent on heating, my family would live in a cold, damp house. And with such a small width of the site, the thickness of the walls is 1.2-1.5 m - this is a lot!

It was necessary to find a solution to this problem. I chose monolithic construction using insulated permanent formwork using TECHNONICOL universal screeds. This method made it possible to reduce the thickness of the walls by half, and I left the saved space for arranging the terrace.

In addition, the method of installing permanent formwork with universal ties is very simple and significantly reduces the time spent on work. After all, what are universal couplers? This is a fastener that quickly and reliably connects the walls of formwork sheets to each other. With their help, I reduced the time for arranging the bathhouse and the foundation of the house by more than 2 times. This was also facilitated by the fact that a combination of formwork and insulation was used - we did not waste time on thermal insulation of the foundation and walls.

True, at first my hired specialists were unusual. They were also not familiar with this method of laying and. They thought it was very difficult and expensive. They held it in their hands like some kind of jewel. We couldn’t figure out how to position it more conveniently, how to connect it correctly. It took almost two weeks to work on the first level of the house’s foundation - they worked out the laying technology. But once we figured out the screed installation system, the work went very quickly. The bathhouse, where the height of the monolith was 3.5 meters, took only 12 days!

Construction technology using permanent formwork

As it turns out, the installation scheme is completely simple:

  1. installed formwork sheets;
  2. secured with ties for permanent formwork;
  3. installed fittings; Material prepared for the website www.site
  4. poured concrete in a circle to a height of about 50 cm, then vibrated the cement mortar;
  5. wait for the layer to dry;
  6. began installing the screeds for the next layer, and so on in a circle.

It took us 3.5 weeks to build the strip foundation and walls of the bathhouse. There was no need to install any bulky wooden structures, spacers, etc., and then reinstall everything. Moreover, there are no complaints at all about the screeds. They hold the load perfectly, and, in addition, it was convenient for the workers to install the fittings. The main difficulty was that when constructing the walls it was necessary to level them evenly. Also, using permanent formwork and universal screeds, the strip foundation for the construction of the house, the basement was removed, and I plan to build the walls using a different technology and insulate them.

Another benefit that I appreciated was the savings on materials. Not only is this formwork for construction, it is also an excellent insulation material for the basement. There is no need to separately purchase and install insulation. With this permanent formwork, the manufacturer guarantees the absence of cold bridges in the finished structure, which is what I needed. Especially for the foundation of a house.

My conclusion

Permanent formwork and universal screeds are a reasonable and economical solution for private construction. Especially if you want to have time to rebuild over the summer. Just don’t violate the terms of the instructions. It is necessary to make permanent formwork for each layer at the height of simultaneous pouring depending on the width of the tape, not higher. Before pouring another layer of concrete, allow the previous layer to dry so that it has time to gain the required strength.

The only difficulty was at the beginning - the process of installing the screeds was not easy due to lack of practice. But everything comes with experience. This technology will save you both budget and time. After all, the solution combines both formwork and insulation. It turns out that you are simultaneously closing two construction processes.

The next stage in the construction of my house is insulating the facade with XPS slabs. Then I'll buy more roofing materials for installing the roof of a house and bathhouse.