Compliance with the technology for installing seam roofing allows you to prevent corrosion of the coating, its deformation and sagging. Right installed material will serve its owners for many years. We’ll look further at how to properly install a seam roof with your own hands.
Seam roofing is distinguished by a special installation technology, which creates a reliable seam lock that prevents water leaks. The appearance of the roof is particularly attractive and gives the building an aristocratic and original appearance.
The roof itself consists of separate panels connected to each other using folds. For their manufacture, sheet or rolled steel is used, always galvanized. To increase the durability of the structure, it is treated with a special coating of non-ferrous metals such as copper, aluminum, zinc, pural or plastisor. The most optimal and durable option is copper. Despite high cost This kind of roof has an amazing appearance and good performance characteristics.
By connecting roofing sheets together, it is possible to obtain a connection called a seam. There are four types of such connections:
The first option is relevant if the roof slopes are located at an angle of more than fifteen degrees. The second option is particularly waterproof and durable, although its construction will require more material and effort, but the result is worth it. Standing seams are relevant for joining longitudinal strips.
Among the advantages of a seam roof, we note:
When installing a seam roof, you also need to learn about its disadvantages, such as:
The most durable copper roofing in use, it will serve its owners for more than one hundred and fifty years. Besides, this type the roof has an attractive appearance, as it has a special textured pattern that imitates various materials. However, the cost of such a roof is quite high, although it quite pays off during operation.
Aluminum roofing is lightweight, resistant to corrosion, mechanical damage and various types of loads. The service life of such a roof reaches one hundred years. The cost of such a roof is an order of magnitude lower than a copper one, but the performance characteristics are also at a high level.
Also, seam roofing is made of titanium-zinc coating, which is distinguished by its prestigious appearance, reliability and durability. Besides, distinctive feature this material is high level its plasticity. After a certain period of use, the roof becomes covered with a patina, which makes it even more elite.
The most affordable material for making seam roofing is ordinary metal. The great demand for this type of roofing is explained primarily by the affordable cost of the coating. The service life of this structure reaches 55 years. You can choose the color and appearance become. In addition, the zinc coating protects the roof from corrosion and destruction.
Seam roofing differs not only in the materials from which it is made, but also in the technological aspects of its installation. In the process of making roofs, materials are used in both sheet and roll versions.
Using sheets - classic version, which unfortunately is losing popularity. The main rule of any installation of seam roofing is to create attic space special conditions, which prevent the formation of condensation on the roof, which destroys it.
An innovative method of roof installation is the use of roll materials. This technology installation is distinguished by the presence of higher quality seams, which are easily installed by specialists.
Among the advantages roll technology installation of seam roofing, we note:
Correct use of the tool during installation work ensures half the service life of the roofing covering. The main tool for constructing a clamp is used in any installation case, both in roll and sheet. There are two types of tools used when rolling the seam:
The first option involves using a set of pliers, which contain two frames that cover the folds. With their help it is possible to create single and double folds.
The electric machine allows you to speed up the work several times, and after rolling, it automatically stops at the final section of the roof.
Also, when installing a seam roof, you will need the following tools:
Additional tools used during the roofing installation process depend on the individual characteristics of the building and the method of installation of roofing materials.
You should begin work on installing a seam roof by choosing a sheathing, for the manufacture of which a steel profile, board or wooden beam. The main requirement for the sheathing is its maximum evenness and absence of recesses.
Seam roof installation instructions:
1. Initially, an insulating coating is laid on the surface of the trusses. Having a light the lathing will provide sufficient ventilation of the under-roof space. The interval for laying the sheathing is 40 cm.
3. Before installing the sheets, install the eaves part of the roof.
4. Also install a support board on the ridge area. In order for the joints to be evenly spaced on the roof, the first and last sheets should be cut in relation to the dimensions of the roof.
5. Install a continuous boardwalk on the valley.
6. The sheets are aligned with an overlap of 4 cm. To fix the sheets on the eaves area, the top sheathing is used.
7. At the end sections of the roof, the roofing material is fixed using self-tapping screws and washers, between which sealing gaskets are installed.
8. Snow barriers are laid at the joints between roofing sheets. To perform longitudinal joining of sheets, also use overlap.
The ridge and ribs on a standing seam roof must be straight. If wood is used to make the sheathing, then do not forget to coat it with an antiseptic composition.
Before starting installation work, you should fix the cornices along the lower edges. Also, the drainage system is installed on initial stage. The valleys are fixed on the sheathing, and on rafter system, an anti-condensation film is installed to provide waterproofing.
Before starting work on the roof, measure its slopes. Stingrays rectangular shape must have equal diagonals. When arranging longitudinal joints, the sheets are fixed in the direction from the bottom to the top. If the length of one slope is more than six meters, then it is assembled from several parts.
The sheets are installed with a slight overlap. When installing a copper roof, it is impossible to use a seaming machine, which significantly improves the tightness of the joints between the sheets.
The service life of a copper roof is more than a hundred years, however, in order to ensure compliance this condition, the roof is installed on a continuous deck.
When arranging flooring for a standing seam roof, you should be guided by the following recommendations:
A solid base is also installed if the roof slope is less than fourteen degrees. In order to improve the tightness of the connection between the sheets, after rolling the seams, use silicone sealant.
In order to create a self-latching roof, galvanized steel sheets are used. The sheets must be in the form of large canvases, which are connected to each other using special grooves.
The most popular rebate options are recumbent and standing versions, used in longitudinal and transverse connections. A self-latching roof is installed much faster and easier than a standard seam roof.
In addition, this type of roofing is distinguished by a variety of color and texture shapes. Therefore, you can choose the best option suitable for a specific building.
To arrange connections between sheets, no special equipment is required, and all work can be carried out independently, without the involvement of specialists. In addition, upon completion of installation, it turns out perfect coverage, in the form of a continuous flooring that absolutely does not allow moisture to pass through.
This roofing option is suitable even for a roof with a slope angle of 8 degrees. Among the advantages of a self-latching roof, we note:
1. Possibility of installation on various types of roofs.
2. Long service life.
3. Thanks to a special installation technology, reliable connections are ensured, and the seams are durable and tight.
4. Seam roofing is characterized by high load-bearing capacity, good resistance to the external environment.
Therefore, when choosing a seam roof for a home that you plan to install yourself, we recommend choosing the self-locking version, since this design does not require the use of special equipment to obtain a high-quality connection between the sheets. Repairing a seam roof will not be difficult, since if certain of its elements are damaged, it is enough to replace them.
Seam roof installation video:
One of the first metal roofing coverings was seam roofing. Having appeared centuries ago, it remains the most reliable type of roofing today.
Seam roofing gets its name from the method of joining metal sheets. The German term "rebate" means "seam" or "gutter". It is with the help of such seams or locks that the fragments of such a roof are connected to each other. The edges of the sheets are folded and connected to each other in various ways:
Such locks ensure the tightness of the roofing, its complete waterproofness, durability and aesthetic appearance.
Metal sheets intended for seam coating most often consist of several layers: a zinc coating, an anti-corrosion coating and a primer are applied one after another to a steel sheet base on both sides, after which it is covered with a layer of decorative polymer on top, and a layer of protective varnish on the bottom. .
Depending on the type of materials used, the following types of seam roofing differ:
To perform installation correctly, it is important to have a tool for clamping seam locks. It can be mechanical or electrical. In the second case it is professional tool, capable of rolling up a double standing seam in one step. Self-latching seam roofing also exists today. The choice of such a roof will make it much easier installation work.
In addition, you will need a hammer, pliers, an electric drill, nibblers, metal scissors, screwdriver, mallet, measuring tools.
Installation of a seam roof begins with the selection of sheathing, which can be sparse (with the required design pitch of 30-40 cm) or solid, made of wooden beams 50x50, boards 32x100 or metal profile. Its main feature should be ideal Smooth surface, without recesses and protrusions, with minimum slope 7°. To protect against rotting, wooden sheathing is impregnated with antiseptics, painted or coated with drying oil. If panels with a self-latching rebate are used, then the sheathing is made of metal.
Thermal and waterproofing is attached to the sheathing so that the seam is reliably protected from corrosion.
A cornice is fixed along the lower edge of the roof slope, and valleys are attached to the sheathing (only the bottom one is used).
Then the steel sheets are prepared: they are marked, cut and joined into sheets equal in length to the roof slope, but not more than 10 m.
At the next stage of work, the workpieces are lifted onto the roof and the roof is installed. Roofing sheets are attached to the sheathing using clamps - narrow steel strips, one end of which is fixed to the sheathing, and the other is inserted into the standing seam. The canvases are fixed in pairs by compaction. All parts (screws, clamps, etc.) must be made of galvanized steel. Smoke and ventilation pipes are also formalized by her.
On finished roofing in top edge The ridge is installed on the slopes, securing it with roofing screws to the upper edge of the seam lock. The ridge can be semicircular or flat.
In those places where the roof is adjacent to walls, pipes and dormer windows, a wall profile is installed.
For a seam roof, a mandatory step is. It is best to choose tubular ones, fixing them on bracket supports that are attached to standing seams. With this method of fastening, the integrity of the sheet is not compromised, which means that the tightness of the roof is maintained.
If the installation technology is followed, the work is carried out competently and high-quality materials are used, a seam roof will not cause any trouble or problems for its owners for a very long time.
The work is carried out in several stages.
The first stage: the production of seam “pictures” for the ordinary covering of roof slopes, as well as eaves overhangs and wall gutters.
Due to the variety of individual components, for the manufacture of additional elements and rental of paintings, the necessary blanks of various shapes and sizes are made directly on the construction site, based on the drawings of the future roof. Steel sheets cut into strips are manufactured (rolled) by our company's specialists using our own German equipment from SCHLEBACH, which forms a finished picture with a double standing seam.
Second phase ( installation of seam roofing): the paintings are lifted onto the roof and their sides are connected to each other with a standing seam. Then the paintings are attached to the sheathing with narrow steel strips - clamps, which at one end are inserted into the standing seams when they are bent, and the other is attached to the sheathing beam.
Thus, a high-quality roofing covering is obtained, without any technological holes. Openings at smoke and gas pipes, including ventilation ones, are covered with galvanized steel aprons.
Galvanized roofing cannot be painted with conventional enamels, nitro- and oil paints . Galvanized roofing steel is coated at the factory with protective polymer coatings. This is often done with rolls. roofing materials. Roll technology is so called because roofing “pictures” are made directly on construction sites made of metal, delivered in rolls, and can be as long as equal to the length roof slope. This is what allows you to avoid transverse (lying) folds. The connection of roofing panels is carried out, as a rule, in a double standing seam. To ensure complete tightness of the joints, the folds can be sealed with special sealants.
Advantages of roll technology (double standing seam):
· the possibility of using not only conventional galvanized steel, but also polymer-coated steel, which, compared to traditional steel, is more corrosion- and wear-resistant, and therefore more durable;
· ensuring a high degree of tightness of the coating (due to rolling the longitudinal seams of adjacent roofing sheets into a standing double seam and, as a rule, the complete absence of horizontal lying seams);
· high technology and reduced labor intensity;
· practical noiselessness, which is extremely important when working in densely populated areas;
· possibility of application for roofs with any slope, any even complex configuration and any size;
· mobility of equipment, which allows you to perform all work not only directly on the construction site, but also directly at the roofer’s workplace.
Installation of double standing seam (seam roofing)
Installation of a seam roof using double standing seam technology is carried out on a solid base using special aluminum clamps.
Click-fold
There is another modern variety seam roof: made of special steel panels with self-locking seams - Click-Fold.
The Click seam roofing system is a competent and relevant solution for roofing, since the installation technology, compared to other roofing materials, is much faster and easier.
The paintings are produced on modern European equipment in various polymer coatings and various thicknesses from European and domestic steel. The length of the painting is made to order in the range of 1.2 - 9 meters. Unlike the classic double standing seam, the click seam is not produced in materials such as copper, zinc, titanium, aluminum. All additional elements are produced in a standard design and are fastened with self-tapping screws, and unlike a double standing seam, it is impossible to produce a click seam on the site of the object under construction.
One of the features of roofing made in click-seam panels is the possible presence of waviness in the patterns, which is caused by the specificity of this material. Metal with a matte polymer coating will reduce the waviness effect.
Such folds are connected to each other without using a special tool.
Click-fold installation
A correctly installed seam roof does not guarantee the occurrence of leaks if the roofing pie is installed with deviations from standards and SNiPs.
When installing roofing pie, it is important to observe the technically competent implementation of the nodes, which will ensure proper ventilation and prevent heat loss. If we consider the entire roofing pie, then we need to approach each component carefully and pay attention to all the subtleties and nuances.
We recommend using first grade lumber and GOST so that the board is calibrated, thereby eliminating the risk of steps and waves in the seam covering. When insulating a roof, it is necessary to use not only a good multi-layer waterproofing membrane, but also a high-quality vapor barrier film mounted under the insulation. When choosing insulation, our company uses and recommends basalt-based mineral wool. Also important is the processing wooden structures roofs with a fire-bioprotective composition, which will prevent premature exit truss structures out of service. All fasteners must be galvanized from trusted manufacturers. As a rule, when performing work on the installation of a rafter system and roofing pie, galvanized screw or rough nails are used, and for hidden fastening For folded paintings, movable and fixed stainless steel clamps are used.
If you follow the technology for installing a seam roof, this will prevent corrosion of the coating, the formation of deflections and the development of deformation. Correctly installed material serves its owners for a long time, which is why it is so important to approach the matter responsibly and carry out installation work, strictly following the instructions and observing safety precautions.
This material has a special installation technique, which creates a reliable lock that prevents water leakage.
The roof is made up of separate panels that are connected to each other using folds. They are made from rolled steel or sheet type with galvanized coating. It is processed by spraying non-ferrous metals (aluminum, copper, pural, zinc, plastisor). But the most durable and the best option considered copper. This material has a high price, but quickly pays for itself due to its operational characteristics and amazing appearance.
Distinguish 4 types of seam connections:
The first option is suitable if the roof slopes are located at an angle of more than 15 °. Double option It is durable and waterproof, but its installation requires more effort and materials. Standing seams are good for joining longitudinal strips.
The advantages of a seam roof include:
Any material has disadvantages, and this one was no exception. The disadvantages include the following properties:
It is worth comparing some qualities of materials to choose an acceptable option:
Roofs are distinguished not only by material, but also by installation technology. The use of sheets is considered a classic. But roll materials are still a more innovative installation. This type of seam roofing is distinguished by high-quality seams.
The advantages of roll installation technology include the following:
Using the tool for its intended purpose ensures the longevity of the coating. You will need the main tool that is used to construct the clamp for both the sheet and roll mounting options. When rolling the seam, you can use an electric type tool or mechanical equipment.
The electric machine speeds up the work, because after rolling it itself stops at the last section. The second option involves using a special set of pliers. With their help, you can create double or single folds.
But this is not all that is required during installation. Need to prepare in advance and other tools:
Additional tools depend on the characteristics of the building and the method of installation of materials.
It’s worth starting with choosing the sheathing. For its manufacture, a steel profile, wooden beam or board is usually used. The sheathing should be as smooth as possible, without any depressions.
The step-by-step actions should be as follows:
The ribs and ridge on the material are distinguished by their straightness. If you chose wood for the sheathing, then coat it with an antiseptic compound. Before installation, secure the curtain rods along the lower edges. At the initial stage, a drainage system is also installed. Fix the valley to the sheathing and install an anti-condensation film on the rafter system to ensure high-quality waterproofing.
Rectangular slopes have equal diagonals. Fix the sheets from bottom to top. If the length of the slope is over 6 m, assemble it in several parts. Installation is carried out with an overlap. When installing a copper roof, you can use a seaming machine: it will improve the tightness of the sheet joint. Such a roof will last a long time if installed on a solid deck.
For arranging the flooring follow the general recommendations:
A solid base is also required when the roof slope is less than 14 °. Use silicone sealant after rolling the seams to improve the tightness of the sheet joint.
In this case, galvanized steel materials are used. Sheets in the form of large canvases are joined together with special grooves. The most popular options for folds include standing and lying ones, which are used in transverse and longitudinal connections. Installing self-latching sheets is easier and faster.
This type of roof amazes with its variety of textures. shapes and colors. You can easily choose an option that will perfectly decorate the building. In this case, no special equipment is required; all the work can be done independently. The result is an ideal coating, and the continuous flooring will not allow moisture to pass through. Suitable even for roofs with an inclination angle of only 8°.
The advantages include:
If you decide to choose a seam roof and install it yourself, then the self-latching option will be the most preferable. For high-quality joining of sheets, no special equipment is required. Repairing such a roof is easy: if damaged, any element is replaced with a new one.
The owner of the house significantly saves on the services of workers if the installation of a standing seam roof is carried out independently.
We wrote about how to choose a material for a seam roof, as well as what types of seam joints are considered the most reliable. Today we will talk about design features metal roofing and about the technology of its installation.
Compliance with certain rules regarding the arrangement of the roofing pie, the features of laying the roofing itself and the sequence of its installation will help to guarantee the protection of the seam roof from condensation, deformation and depressurization.
In this article we will consider the following questions:
If the construction of a house begins from the foundation, then the installation of a seam roof begins with the creation of a roofing pie that protects the attic space from condensation and cold. At the same time, the roofing pie serves as reliable protection against noise arising from precipitation.
Pavel T. User FORUMHOUSE
If the roof insulation is 250-300 mm (I have 300), then no noise is heard (unless, of course, there is hail the size of an egg). The only place where I can hear the rain (and even then weakly) is in the bathroom, which has a suspended ceiling.
To ensure that the thermal insulation is of the required thickness, the insulation can be laid in several layers (between the rafters and under them).
The roofing pie of a seam roof consists of several layers:
Let's take a closer look at them.
Support sheathing – lower wooden slats, on which a vapor barrier film and insulation are placed.
Vapor barrier film is a special material that does not allow moisture from the room to penetrate into the insulation.
Rafters – wooden beams cross section 200x50 mm. The distance between the rafters is 1.2...2 m.
Mineral wool is most often used as insulation. The insulation is laid between the rafters directly on the vapor barrier film, which, in turn, is supported by the lower sheathing.
Waterproofing – special film, which allows moisture to pass through only in one direction (bottom to top). Waterproofing prevents under-roof condensation from penetrating into the insulation, but allows moist air to pass through, accumulating in the layer mineral wool. Waterproofing film is a diffusion (breathable) membrane that is sold in hardware stores.
berd80 User FORUMHOUSE
Can be spread diffusion membrane, you can use a special volumetric membrane (but it costs a lot). There was no consensus on this issue.
Waterproofing spreads across the rafters in the direction from bottom to top (starting from cornice strip, towards the ridge). The film is attached to the wooden rafters with staples (using a stapler). Individual strips of the waterproofing membrane are laid overlapping (the overlap width is at least 100 mm). On gable overhangs it is necessary to ensure the overhang of the film (overhang width is approximately 150 mm).
The film should not be in a tense state, and the permissible sagging of the membrane between two adjacent lags is 35 mm.
Under no circumstances should you use the same material as a vapor barrier and waterproofing. Moreover, you cannot swap them. All this will lead to the accumulation of moisture in the insulation or, conversely, in the room. The development of mold and subsequent destruction of building structures in this case are guaranteed.
Counter-lattice - 50x50 timber, which is nailed to the rafters on top waterproofing film. The counter grill allows you to create air gap between waterproofing and seam covering.
A special sealing tape is placed under the counter beams, which ensures tightness at the nail joints and protects the insulation from moisture.
Sheathing - transverse strips nailed to the counter-lattice at a certain distance.
Arhios User FORUMHOUSE
A 50x50 block (counter-lattice) is nailed along the rafters, and on them (across) - 100x25 planks with a spread (lattice).
The counter-lattice provides ventilation of the under-roof space, which eliminates the condensation that forms there. In order for the counter-lattice to be guaranteed to fulfill its functions, the eaves overhang of a seam roof must be made according to the following scheme:
The sheathing must be strong, rigid and even. The maximum clearance between the sheathing and the control batten 1 meter long should not exceed 5 mm.
Effective ventilation of the under-roof space is ensured by a ventilated ridge.
And also a ventilation mesh tape made of PVC, which is stretched between the sheathing and the front board of the eaves overhang.
Thanks to these two elements, constant ventilation of the under-roof space is ensured.
The pitch of the sheathing deserves special attention - the distance through which the transverse strips are nailed. In accordance with the set of rules for the installation of metal seam roofing (SP 17.13330.2011), the distance between individual sheathing strips should not exceed 200 mm. This allows the foot of the person stepping on roofing, rest on two boards at once, which protects the metal from deformation.
Along the edges of the roof (in areas of roof overhangs), as well as in the gutters, a continuous boardwalk with a width of at least 700 mm is created.
Some users of our portal recommend making a continuous sheathing over the entire area of the seam roof, which, in general, is not a mistake (especially if this coincides with the recommendations of the manufacturers of seam roofing). For example, according to technological requirements The continuous sheathing is necessarily “spread” under the zinc-titanium roof.
Continuous sheathing is a relative concept. A small gap (no more than 10 mm) must be left between each transverse plank of the sheathing, which will compensate for the thermal expansion of the wood.
More details can be found by visiting the corresponding FORUMHOUSE section.
If you decide to make folded pictures from rolled or sheet metal, then you cannot do without the use of sheet bending and folding machines. Purchase similar equipment for personal construction– inappropriate. But this does not mean that metal should be bent by hand.
vasilpolt User FORUMHOUSE
It is better to use the service of a team that has a machine for rolling pictures. The quality of the roof in this case will be better than if you bend the rolled products by hand. There is even a separate service – “Painting rental”. Virtually every roofing company, which has necessary equipment, offer it to their clients. Try searching in your area.
Also using sheet bending equipment you can make the necessary additional elements. What kind of extras will be needed for construction - it depends on design features roofs.
The photo shows typical profiles, the geometry and dimensions of which may differ depending on the characteristics of a particular roof.
Installation of a seam roof begins with the installation of eaves overhangs. We immediately draw your attention to the fact that the eaves overhangs have different designs. It directly depends on the design of the drainage system. Gutter systems, in turn, can have suspended or wall-mounted gutters.
The eaves overhang with a hanging gutter does not have transverse folds, making the roof more airtight and easier to install. Considering that snow and ice can easily damage a suspended drain, roof surfaces with long slopes must be equipped with additional elements for snow retention.
A system with wall gutters and flat top flashings has more complex design, and it is better to trust its installation to experienced tinsmiths. The rigidity of a system with wall gutters is an order of magnitude higher than that of its counterpart with hanging gutters.
Roofer1959 User FORUMHOUSE
Regarding gutters: if they are made correctly, then any are good. The wall-mounted one is more reliable in terms of rigidity, and I can vouch for its safety. But there is a weak point - the liner of paintings (especially if the fold is single). The suspended one does not have this disadvantage, but its rigidity under certain operating conditions can be called into question.
There is no consensus on which drainage system should be installed in conjunction with a seam roof. But no matter which option you personally like, the cornice assembly will have to be arranged according to the same principles.
Installation of the cornice assembly begins with the installation of drips and ventilation tape.
The lower eaves profile – the “drip tray” (through which the condensate formed in the under-roof space will flow) – is mounted on the rafters and covered with a waterproofing membrane. This is done at the stage of arranging the roofing pie.
A thin layer of adhesive or roofing sealant should be applied between the waterproofing and drip line.
Sometimes the bottom drip is not used at all: for example, if the under-roof space is well ventilated (using a ventilated ridge on top and a ventilation tape on the bottom). But it is better if it is installed after all.
nekorsakov User FORUMHOUSE
First of all we installed plastic mesh for the gap between the sheathing and the front board. Eaves strips were placed on top of the mesh, which were fastened to the sheathing with galvanized roofing nails, driving them in a checkerboard pattern. The planks were mounted along a cord stretched along the eaves, and the mesh was simply attached tightly along the edge.
PVC mesh protects the under-roof space from insects and debris. The distance between the cornice strip and the ventilation mesh must be at least 2…3 cm.
If you plan to use suspended gutters as part of the roof, you need to think in advance about how to install eaves hooks for the drainage system. Thus, long curtain rod hooks, which are attached to the top sheathing, are inserted directly under the curtain rod. Under each hook it is necessary to make a recess in the surface of the sheathing. Otherwise, the seam paintings along the edge of the overhang will go in waves.
To give the eaves overhang additional rigidity, metal roofing spikes are installed under the eaves strip.
The crutches cut into the flooring flush with the surface of the sheathing (similar to drainage hooks) and are attached to it with self-tapping screws.
The distance between two adjacent crutches is 60…70 cm.
Standard crutches are commercially available, but you can easily make them yourself. For the manufacture of crutches, a steel strip of 40x4 mm is most often used. Blanks of the required size are welded together, after which they are drilled and subjected to anti-corrosion treatment (treated with a primer).
Fasteners for galvanized roofing (including crutches) must be made only of galvanized steel.
A standard T-shaped spike for an eaves overhang has a width of 100 to 200 mm, and its length depends on the design features of the roof.
Crutches are used to strengthen eaves overhangs, as well as other roofing elements. Therefore, they can have different geometries, which depend on the intended purpose of the product.
Seam connections themselves are already stiffening ribs. Therefore, on roofs with suspended gutters, roofing spikes may not be used, but can be replaced with strips of galvanized or painted metal. They are installed along the overhang. Steel strips are placed on top of the cornice strip or placed under it, depending on the geometry of the cornice profile.
nekorsakov
Before installing the rebated paintings, it was necessary to install additional strips of metal, reinforcing the rigidity of the overhang and forming a protrusion (50mm), for which the curved edges were then secured and crimped.
Seam roofs equipped with wall gutters and flat flashings must be reinforced with roofing studs.
Having completed the arrangement of the cornice assembly, you can move on to the next stage of work. But first, let's talk a little about construction tools.
Tools and accessories for mounting folded pictures
A mallet (plastic, wood or rubber) and a hammer are tools for forming bends and other elements of a seam roof.
Shlazen (mandrel, mandrel-blade) - a device that serves to form ridges and arrange locks at junctions (valleys, bypasses ventilation ducts and chimneys, etc.).
Straight and corner pliers (large and small) for forming seam bends and other complex elements and roofing.
Crimping roofing frames – used for crimping L-shaped and double seams. Essentially, both frames are used to close a double seam, because the folding is carried out in two passes: the L-frame closes a single standing seam during the first pass, and the frame to close a double seam is used during the second pass.
There are also frames for bending roof overhangs. They are used when installing various paintings (including self-latching ones).
Set of metal scissors with different cutting angles.
You cannot cut panels with a grinder or other abrasive tool! It's destroying protective covering material.
Installation roof slopes starts with installing the launch pad. The key difference between the starting panel and the ordinary panel is the special geometry of the profile, thanks to which you can attach the picture to the sheathing on both sides at once.
The pitch between adjacent fasteners (clamps) is 40...50 cm.
The clasps must completely repeat the geometry of the bends that are on the side shelves of the folded paintings. Such fasteners can be made independently, or can be purchased on the construction market.
If the length of the roof slopes exceeds 6.5 meters, experts recommend using movable clamps, which allow you to compensate for possible deformations from thermal expansion of the panels.
After installing the starting picture, the rest of the roof is installed.
nekorsakov
Next to the laid and fixed picture, the next one is laid, which overlaps (with a curved edge) covering the nail flange of the previous panel. Both pictures are crimped into a lock together with already installed (hidden) clasps. The result is a very reliable and airtight connection, because all fasteners are covered with sheets of metal.
Crimping of seam joints is carried out in a standard sequence. First, using a frame to close the horizontal lock, the first crimp is performed. A second crimp is then carried out using the double fold closure frame.
The finishing picture is cut to size (so that it does not protrude beyond the gable overhang), folded and secured with clamps to the sheathing. The gable overhang is subsequently covered with a special profile.
Foamed soundproofing tape, which can be placed under the seam panels along their entire length, additionally protects the room from noise generated during rain. The tape is cut to size and stapled to the sheathing.
We have described the installation sequence of paintings produced on folding equipment according to individual sizes. Installation of a self-latching roof has its own nuances.
For example, when installing self-locking panels, instead of clamps, roofing screws are used, which are screwed into the nail strips of seam panels. The nail strips have oblong holes that help compensate for thermal deformation of the panels.
To attach clasps and self-locking panels to wooden sheathing, use roofing nails or galvanized self-tapping screws with a press washer (for wood) that have a flat head.
To prevent the self-latching roof from moving into the hot weather, the screws must be screwed exactly into the middle oblong hole. In this case, after screwing the self-tapping screw completely, it should be unscrewed about a quarter of a turn (so that the panel can move slightly under the influence of thermal expansion).
The ridges of folded paintings, located in places where the eaves overhang, should be trimmed (literally by 2...3 cm).
After this, the remaining (protruding) part of the picture will easily bend under the eaves overhang, forming a reliable and airtight eaves overhang.
It is not necessary to completely remove the outermost part of the ridge. It can be folded, forming a neat decorative plug at the end of the fold.
Installation of side end strips
We present the installation diagram for the side gable profile.
At the junction of the roof slopes, the end strips are connected as follows.
The main elements of a ventilated ridge are: the upper ridge profile, ventilation grille and supporting elements.
nekorsakov
I decided to place the lower (support) strips between the sheathing and the picture, without securing anything else. I mounted the upper planks on top of them (with some overlap). The support strip is ultimately held not by individual screws, but by an entire roofing sheet, fixed with clamps and pressed together with adjacent sheets. In this mounting option, the perforated wall of the support strip turned out to be pushed deep from the edge, which seemed to me both aesthetically and functionally better (away from the “aggressive” external environment with its sediments).
Chimneys and ventilation shafts– protruding elements, the bypass of which when installing a seam roof requires certain skills in performing tin work. Let's consider standard option bypass using the example of a self-latching roof. Any non-professional roofer can install it.
Pieces with locks are cut off from standard seam panels (indicated in red in the diagram). They are used to form abutment strips (side aprons), which on one side are adjacent to the pipe wall, and on the other, snap into place with adjacent panels. The space between the side aprons is closed with junction strips (top and bottom), which do not have a latch. A hook is made on the top bar, on which the picture fits to the chimney from above rests. The bottom bar with a hook rests on the bottom picture.
The junctions of the aprons with the pipe walls are sealed with roofing sealant.
Panels that are rolled with a double seam are mounted in the same way at the pipe bypass.
All four aprons, in this case, are connected to the adjacent paintings using recumbent and standing seams.
Let us immediately pay attention to the requirements for arranging the base for the valley plank: the base here will be a solid wooden sheathing.
The design of metal junctions should ensure maximum tightness of the roof at the junction of two slopes. Therefore, the valley strip must be secured to the sheathing with clamps (in no case with self-tapping screws), and the junction of the paintings to the valley should be closed with a double fold.
The owner of the sofa
Not The best decision- make holes in the paintings (and at the same time in the valley) with self-tapping screws. It is more correct to make a fold (fold) on the edge of the picture and place it on the corresponding fold of the valley. The result is a recumbent fold. The overlap size is approximately 30 millimeters. The endova, in turn, is attached with clamps to the sheathing.
These rules are relevant for folded pictures and profiles made from sheet or rolled products using sheet bending/folding equipment. When installing junctions on a “self-latching roof”, you should follow the instructions and recommendations of the roofing panel manufacturers.
The connection to the wall is a structural element that no one can do without. complex roof. Similar connections have simple design and are performed using a special profile.
You can find out more in detail, as well as about the technological aspects associated with its installation, in the corresponding section of our portal. You can get information by reading an article based on recommendations from FORUMHOUSE users. For those readers who want to see a visual master class on installing a seam roof, we have prepared a short thematic video.
