OSB boards are quite often used for laying floors on joists, on concrete base, as well as on a dry screed. However, not everyone knows how to properly lay OSB and how thick they should be, as well as how justified such material is in a given situation. We will deal with these questions in detail and with photos in this article.
To lay flooring or level the floor, you can use analogues of oriented strand board - plywood or tongue and groove boards. There are some differences between them.
Advantages of OSB in comparison with other materials:
To decide what thickness of OSB is needed for the floor, you need to know how it will be used.
There are several methods for laying OSB boards on the floor, it all depends on the type of base. Each method has both advantages and disadvantages. We will try to highlight the pros and cons of laying slabs.
The dry backfill on the exposed beacons must be carefully leveled, after which you can begin laying OSB boards. The first and second layers are placed with the seams offset relative to each other at a distance of at least 20 cm. Fixed in an oriented particle boards with wood screws 25 mm long, screwing them along the seams of the top layer every 15-20 cm.
Traditionally, plasterboard is laid on a dry screed, which is subsequently covered with laminate or parquet board. At the same time, the cost of drywall is significantly lower than OSB. It is advisable to use particle boards if they are planned to be covered with linoleum in the future.
In order for the self-tapping screws to fit flush with the slab, first narrow holes with a diameter of 3 mm are drilled under them, and then they are expanded at the top with a 10 mm drill. Thus, the cap will be completely hidden in the thickness of the slab.
Over time, a wooden floor can succumb to deformation, dry out and become brittle. In such cases, installation is done as follows:
Oriented strand board and plywood can be easily processed using a sander with a drywall mesh (more details: " "). This mesh allows you to cover a much larger area than regular sandpaper.
Installation of OSB on logs is carried out as follows:
For ease of installation, you can pre-mark the location of the logs on OSB boards.
In conclusion, we note that Additional information can be gleaned from the video materials attached to this article. We wish you a successful repair.
Oriented strand boards (OSB) are a relatively new type of building material. They are often used as alternative option instead of chipboard and plywood when constructing flooring. Plates help get rid of various irregularities. This increases the strength of the floor. It's getting warmer. This base can be used for installation of almost any type of decorative coating.
The advantages of the material include:
Pressed wood chips are used in the production of the board. Waterproof resins are used for gluing it. The product consists of three layers. In the outer layers, chips are laid along the surface of the material. In the interior it is located perpendicularly.
There are 4 types of products:
The flooring is laid using OSB 3 sheets. They are able to withstand the required load and are resistant to temperature changes. They are easy to process and install. The material can be used as a base for laying linoleum, laminate and ceramic tiles.
The plates are used to level the surface being treated. Laying OSB on a wooden floor is carried out in a certain sequence:
The length of the screws should not be less than 45 mm. To make the flooring more durable, the OSB board is laid in 2 layers. The seam near the wall is filled using polyurethane foam. After it has completely dried, the excess is removed with a construction knife.
Let's look at how to lay a coating on a floor with a concrete base. The composition of the slabs includes natural wood chips. This material structure allows you to create high thermal insulation. In addition, the panels reliably isolate the room from the penetration of various noises.
Installation of OSB on a concrete floor is carried out as follows:
OSB sheets for wooden floors
How to install panels correctly? Is it possible to do without using a leveling screed when laying slabs on a concrete base?
The technology for installing oriented strand panels allows work to be carried out in a similar way. In this case, wooden logs should be laid directly on concrete surface. For fastening, special dowels or anchors are used. The installation step of the fasteners will depend on the thickness of the wood boards used.
The space created between the joists, the concrete floor and the top covering is laid thermal insulation material. If there is moisture below basement, additionally added to the design vapor barrier films or membranes.
By doing installation work rules must be followed:
Installation of panels on logs is carried out in the following order:
When performing installation work, you should use special clothing, gloves and safety glasses. The material itself has a fairly strong structure. But during the cutting and additional processing process, small chips and wood dust are formed, which can damage the eyes.
The panels must be laid and cut carefully, without using unnecessary force. Using the above instructions, you can easily lay the material yourself, without resorting to the services of professional builders.
OSB flooring is a covering made of oriented strand board, which is made from several layers of wood chips (mainly pine). The panels also contain resin and synthetic wax. Three-layer plates are produced under pressure and high temperatures.
Every year the demand for OSB boards is growing, which is not surprising, because the material has the following advantages:
In addition, OSB subfloors may contain a synthetic substance such as phenol. But over the past few years, manufacturers have been actively solving this problem and switching to the production of formaldehyde-free panels. Such material is considered absolutely safe for human health. On its packaging you will find the “Eco” or “Green” label.
Several types of OSB are used in construction work:
The thickness of OSB boards for flooring can vary, but in order for the panels to retain heat well, perform soundproofing functions, and also level the surface, it is recommended to choose products eight to ten millimeters thick. When installing boards on joists, the recommended panel thickness is 16-19 mm. OSB-3 boards withstand various conditions well power load and movement of people.
To properly smooth out small defects in the flooring, it is enough to use a material ten millimeters thick. If the floor has strong bumps and cracks, then slabs of 15-25 mm will be required.
OSB boards are often used for flooring under linoleum, parquet, tiles or laminate. This material serves as a high-quality and durable base for decorative coating.
The choice of material and floor design depends on the purpose of the room and its characteristics. As a rule, two main types of laying OSB boards are used - on logs and directly on concrete screed.
Floors made from OSB slabs on joists are an excellent alternative to concrete screed. This installation allows you to save money on building materials. In addition, the surface can be easily insulated, and wiring communications will not cause problems - they can simply be placed in the cracks between the wooden blocks.
The advantages of laying OSB on logs include the fact that with their help, foundations are perfectly leveled even with the most sudden changes. The result is a smooth surface, and the floor structure is not weighted. If some panels become unusable, they can be easily replaced.
The only disadvantage of this installation method is that the entire structure turns out to be quite high, about 90-95 mm, and this will make the room lower.
Mold and mildew must be removed without fail. If this is not done, microorganisms will attack the logs, and over time, the OSB boards. This will lead to premature damage to the floor covering. All debris from the floor surface should be removed.
Logs can be installed on a sloping floor, but the maximum slope level should be 0.2%. To determine the angle, you must use a water level or a long level. If too large slopes are found, they should be leveled using a self-leveling mixture.
After they are prepared, we proceed to installation according to this scheme:
Oriented strand boards with plain edges should be laid on the floor. It would be good if there were grooves on them that would help fasten the panels together. To correctly calculate the required number of sheets, take into account the fact that seven percent of the material will be lost during cutting.
It is quite easy to install OSB floors yourself using the following instructions:
No additional preparation of OSB for painting is necessary. You just need to clean the floor from dust and cover it with a couple of layers of varnish or paint. This can be done either with a roller or with a spray. Hard to reach places should be painted with a brush.
There are panels that cost more, but they are already available with a glossy sheen. Finishing such a covering will be very simple: you just need to decorate the perimeter of the room with a plinth - and that’s it, the floor is ready for use.
If you are laying on top of slabs rolled materials, for example, carpet or linoleum, then make sure that all joints between OSB panels are flush with the entire surface and do not stick out anywhere. Any small irregularities can be removed using sanding paper. The expansion gaps must be filled with elastic sealant.
There is no need to prepare panels for laying laminate over OSB. Small irregularities at the joints will be leveled out by the substrate.
How to lay OSB on the floor - watch the video:
Most types produced today flooring materials, for installation they require the creation of a flat, solid base. In most cases, the device is made of concrete or sand-cement screed in the house. However, there is a worthy alternative, which is to install OSB boards over wooden joists. The result is a strong, even rough base suitable for laying any floor covering. What is special about the OSB board that can replace a concrete screed? About this, as well as about ways OSB installation Do-it-yourself logs will be discussed in the article using information in video format.
For the first time, such material began to be produced and used in countries North America. Soon, pressed particle boards found application and began to be produced in Europe. OSB consists of several layers of compressed large shavings, mainly coniferous species wood glued together. It is characteristic, and this is a feature of the material, that the chips in adjacent layers are located mutually perpendicular. Thanks to this, the material is much stronger than wood at the same thickness, especially in bending. In addition to high strength, the material has a number of other positive characteristics, such as:
According to the degree of moisture resistance, there are four types of OSV slabs. For the installation of floors, OSB 2 is used, which is intended for the installation of load-bearing structures in conditions of normal humidity, and OSB 3, which is applicable in conditions of high humidity. The second type is suitable for arranging the base of the floor along joists for further flooring of parquet and laminate. Under linoleum it is better to use the third, moisture-resistant type of OSB board, since condensation can form under it. A moisture-resistant slab base can even be used for laying tiles.
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To ensure that the base of the floor, made with OSB slabs on logs with your own hands, is in no way inferior in strength to the screed, you should correctly select the thickness of the sheets and correlate them with the pitch of the logs. Compressed chip material is stronger solid wood, so the ratio in this case is somewhat different.
For flooring, sheets with a thickness of 9 mm or more can be used. With this size of the slab, the pitch between the load-bearing bars should not exceed 25 cm. A thickness of 16 mm corresponds to a log pitch of 35-40 cm. A sheet 22 mm thick will not bend at a distance between the bars of up to 60 cm. With a beam pitch of 80-90 cm, OSB with a thickness of 80-90 cm will be appropriate 25 mm.
Important! It should be noted that as the thickness of the sheet increases, its cost increases significantly. To calculate the most profitable option for the timber/OSB sheet ratio, several options should be compared. You can take into account the width of the insulation, respectively, the convenient distance (step) between the load-bearing bars, and in fact select required thickness slabs
The peculiarity of the flooring of the slabs is that at the places where they are joined, the logs must be wide enough to securely fasten both joining elements. Therefore, it is desirable that the width of the upper side of the joist be at least 4 cm (preferably 5-6 cm). You should also take into account that you will need to secure additional fragments of timber (perpendicular to the logs) in the places where the slabs are longitudinally joined. A timber made from any second or third grade coniferous wood is quite suitable as a lag. Humidity should not exceed 20%. If the logs are in conditions high humidity, it is advisable to choose a block of larch or aspen. Before installing load-bearing wooden beams, they should be treated with antibacterial and moisture-repellent impregnations, which will significantly extend their service life.
OSB sheets can be laid on logs installed on the ground floor and as interfloor partitions in private houses. This material is also used in apartments when load-bearing wooden beams are installed on rough screed or floor slabs. The only differences will be in the method of installing the logs. From the point of view of installing a floor with your own hands, you can consider the simplest option, when the beams are installed with a certain step on a concrete or cement-sand screed.
To work you will need the tools listed below:
In addition to the main ones (OSB, beams for logs, insulation), you will need Consumables, such as:
The work begins with the installation of logs. They are installed in parallel. Their pitch should be calculated so that the distance corresponds to the thickness of the slabs and width (so that adjacent sheets fit well together on one joist). The bars closest to the wall should be located at a distance of about 20 cm from it. In places where the slabs are longitudinally joined, additional transverse sections of bars are installed. When attaching the joists to the screed or slabs, their horizontalness is regulated by linings made of wood chips.
Insulation is laid between the load-bearing bars. You can use polystyrene (foam plastic, penoplex) or mineral wool as it. The latter should be protected from moisture from the side of the rough screed, for which a vapor barrier membrane is used.
OSB sheets are laid over the prepared beam frame and secured to the joists with self-tapping screws. First you need to install entire slabs, and then use a jigsaw to cut out the missing fragments, having previously marked the material. OSB should not be laid close to the wall, but leaving small gaps of about 1 cm, which are necessary to allow thermal expansion of the material. The resulting cracks are filled with polyurethane foam for sealing.
The seams between the plates at the places where they join can be filled silicone sealant, especially if it is intended to be the finishing floor layer tile. To visually reinforce the information received, you can watch this video
Important! A properly constructed floor base made of OSB slabs along joists (as in the video) is a durable structure that is in no way inferior in performance to a screed. After installing the slabs, you can immediately begin laying finishing coating using the same technology as for finishing screed. No additional processing (priming, for example, or leveling) surface made of OSB
From the author: We welcome everyone who reads this article! We dedicate today's material to those who want to independently update floor coverings in an apartment or private house, spending a minimum amount of time. One of the most economical options- do-it-yourself OSB flooring. Its installation does not take much time, and the price allows you to purchase this building material without compromising your budget. We will tell you further about how to choose the material and carry out the repair correctly.
Before bed OSB boards, let's look at the features of this building material. Oriented strand boards are made from wood chips and consist of several layers pressed together and glued together using various waterproof resins and synthetic wax. Under influence high temperature and appropriate pressure, a reliable, durable material is obtained.
Each slab usually consists of three (rarely four) layers. In external ones, shavings 7–15 centimeters long and 1–1.2 centimeters wide are located longitudinally, in internal ones - transversely. This decision gives special properties ready-made slabs. The material is classified according to the degree of strength, the index is indicated in numbers.
Source: http://pamir.mk.ua
In construction, to make, the following types of slabs are used:
To know whether it is possible to use oriented strand boards for a rough coating and lay them as a finishing coating, let's look at the main qualities of OSB boards. Builders include the following among their advantages:
The only disadvantage that is mentioned is that the resins may contain phenol, however, manufacturers today are successfully introducing new technologies that make it possible to create polymer resins without formaldehyde. Such products are labeled as “ECO” or “Green”.
Source: http://superdom.ua
Let's find out how to choose slabs and other types of coatings. First of all, you should pay attention to the country of origin. The best material is considered to be produced in Europe and North America, where environmental safety requirements are met and new technologies are used. Next, you should choose the right degree of strength of the slab. Experts agree that products with the OSB index 3 are optimal for residential premises - durable, reliable, and moisture-resistant. It is also necessary to take into account the thickness - if you want to lay OSB on wooden joists, the recommended material thickness is from 15 to 25 millimeters.
Before laying OSB on an old wooden floor or concrete screed, you will need to stock up on the following tools:
You also need to make sure that you have the necessary supplies on hand:
Now you can begin work on laying the flooring.
To properly lay the material on a wooden or concrete base, you need to know how to perform each stage of the work. Our step-by-step instructions will help you with this:
That's all for today. We look forward to your feedback on how useful this information was. Subscribe to our groups on social networks, share links with friends - perhaps this material will help them make their home more comfortable and warm. See you soon!
