Do-it-yourself crate for metal roofing. How to make a crate for a metal tile with your own hands

The metal profile is the most practical, affordable, popular roofing, which is purchased and installed by millions of owners of private and country houses. The advantage of this material is that its laying technology allows you to do the work yourself, saving on hiring a professional team. However, inexperienced craftsmen often have the question of how to make a crate for a metal tile, what is the right size of boards and the step between them so that the roof can withstand intense snow and wind loads. In this article we will talk about the device of the crate under the metal tile, and how to build it yourself.

Sheathing for metal tiles - the base on which the roofing is laid. It performs 3 most important functions in the roof structure: it provides rigidity to the roof slopes and evenly distributes the weight of the metal profile, transferring the load to the foundation. For the manufacture of the base for the roof, an edged board or moisture-resistant plywood is used, the size and thickness of which is determined by the calculation of the load. The crate for the metal tile consists of 2 elements:

Control grid. The counter-lattice is wooden slats 2-5 cm thick, which are fixed along the rafter legs of the frame over the waterproofing. This structural element helps to fix the waterproofing film and forms a ventilation gap inside the "pie".
Lathing under a metal tile. When a counter-lattice is mounted on top of the rafters, a crate for a metal tile is attached perpendicular to it. To make it, an edged or unedged board or OSB is used. The size and pitch of the crate for metal tiles determines the calculation, which takes into account the weight of the roofing material, snow and wind loads.

Important! The counter-lattice and the crate for metal tiles are important elements of the roof structure, on which its strength and load-bearing capacity depend. To determine the required size and pitch, you need to correctly calculate by summing up the loads that the board is subjected to during operation.

Lathing under the metal tile is a mandatory structural element, which performs the function of supporting and distributing the load on the rafters. On this design, for the manufacture of which a cut board or moisture-resistant plywood is used, a finishing coating is laid. Properly calculated step of the crate under the metal tile guarantees strength and high load-bearing capacity of the roof. The crate for metal tiles is of 2 types:

Important! The counter-lattice and crate for metal tiles are most often made of wood. To protect the wood from moisture, it is necessary to impregnate with antiseptic compounds. It is also recommended to treat the boards from which the roof frame is made with fire-blocking substances.

Type Selection Criteria

Inexperienced craftsmen often wonder how to make a crate for a metal tile correctly. In order to answer it, it is necessary to carefully study the manufacturer's instructions, because the distance between its rails depends on the nature and wavelength of the metal profile. In order to properly mount the base for the flooring of the roofing material, 2 factors must be considered:

bias. The greater the slope, the greater the distance can be between the elements of the base. If it is flat, then the counter-lattice and the grating on which the coating is laid are made of thicker and more durable materials.
Material weight. A metal roof weighs only 3.5-4.5 kg / m2, so the dimensions of the boards for the manufacture of the base are calculated based on additional factors.
Climatic conditions. If the construction area is characterized by a large amount of precipitation in winter, then the size of the elements for the manufacture of the base is increased, and the distance between them is reduced.
Character wave profile. The distance between the rails must correspond to the wavelength of the metal profile in order to make it convenient to install the coating.

Experienced craftsmen advise taking into account the wavelength of the metal profile, calculating the step between structural elements in order to simplify the process of fixing sheets of material. A high-quality frame will save you from many problems during installation.

Influence of slope angle

It is better to start the installation of the crate under the metal tile by carefully calculating the permanent and temporary loads to which it is subjected. In order for the design to withstand all natural disasters, it is better to include a small margin of safety in the calculations. Experienced craftsmen recommend adhering to the following recommendations:

The crate for metal tiles on a low-slope roof should be solid. It is more rational to make it from sheets of moisture-resistant plywood.
The crate for metal tiles on a medium-slope structure should be lattice. The step between the slats should be 10-15 cm, and the thickness should be 4-5 cm.
The basis for the flooring of the metal profile, if the angle of inclination of the slopes is more than 35 degrees, can be sparse with a distance between the slats of 15-20 cm, and a thickness of 2-3 cm.

Please note that the roof under the metal tile must be flat so that the material does not “walk” after installation. Therefore, for the manufacture of the base, it is better to use OSB or a planed edged board, aligned in thickness.

Even an inexperienced master can cope with the installation of a roof made of profiled steel sheets, provided that the roofing pie is properly organized. The main thing is to strictly follow the manufacturer's recommendations and follow the technology for performing work. Read more about the design of metal roofs, the device of insulation, waterproofing, read in other materials on the site.

Video instruction

Metal tile is one of the most common roofing materials, which is made of aluminum, steel or copper profiled sheets coated with a layer of zinc and polymers. This structure gives the material strength and resistance to negative environmental influences. In order for the tile to retain its original appearance for as long as possible, all stages of its installation must be approached with all responsibility. First of all, it concerns the installation of the lathing, which is the basis for the roofing.

Why do you need a crate

The roof sheathing is a simple structure consisting of many small-section rails located perpendicular to the rafters. This frame has several functions:

Lathing device for metal roofing

Proper arrangement of the sheathing for metal tiles is the key to high-quality laying of the roofing material. Therefore, at such points as the calculation and installation of the crate, the choice of material and the distance between the structural elements, it is worth dwelling in more detail.

Choice of material and type of construction

As a rule, fir, spruce or pine are used as the material for the sheathing under metal tiles. If it is not possible to purchase conifers, hardwoods are used. The optimal material is pine, which is due to good strength, hardness, ductility during processing and reasonable cost. It is worth considering that the lumber must be dried before laying on the roof, they should not show signs of rot and traces of insect activity. In addition, wooden elements in thickness should be the same. If the board or timber is insufficiently or incorrectly dried, then over time it will warp (lead).

In addition to the choice of materials, you should know that several types of crates are made under the metal tile:

For a roof made of metal, the minimum angle of inclination should be 14˚.

How to choose a pitch between rows

Lumber used for sheathing under metal tiles can have different sizes:

The use of unedged or semi-edged boards is unacceptable, since the materials must withstand people with loads during installation.

The step of a sparse crate depends on the type of tile and its parameters. The standard value for the considered roofing material is 35 cm. This size allows you to fix the coating at the lowest point of the wave. In most cases, the manufacturer of the roofing material indicates the necessary data for the step of the battens. If there are no recommendations, the distance between the boards is determined based on the wavelength of the coating. The main frame sizes for profiled tiles are 30, 35 and 40 cm. For Monterrey metal tiles, the sheathing pitch is 35 cm.

Required Tools

To build the frame, you will need to prepare the following set of tools:

roulette;
level;
triangular ruler;
felt-tip pen;
screwdriver;
a hammer;
galvanized nails and screws;
tools for cutting wood (electric jigsaw, electric scissors, hacksaw);
ladder or wooden platform.

Calculation and dimensions of the crate under the metal tile

In order to avoid getting fasteners into the voids during screwing, it is necessary to correctly position the boards of the crate. In this case, it is important to calculate the distance between the rows. It is best to use the existing roofing for calculations or know its exact dimensions. The parameters of the sheets, as well as the additional elements of metal tiles, are different - from 0.4 to 8 m in length and 1.16–1.19 m in width. This suggests that the installation of the crate without knowledge of the dimensions of the metal tile can lead to errors in the calculations. As a result, it may be necessary to redo the entire frame. The size of the crate under the tiles is easy to calculate. The procedure is reduced to determining the wave pitch and the corresponding arrangement of boards or bars.

Mounting sequence

When everything you need is prepared, you can proceed with the installation work. Let's consider the arrangement of the crate for the Monterrey metal tile, since this roofing material has a wide range of colors and is suitable for buildings of different architectural styles. Installation is performed in the following sequence:

Video: installing a sheathing under a metal tile

Features of the lathing on a gable roof

Lathing and counter-latting for a simple roof with two slopes is carried out the same way on both sides with a step of 30 cm. For more complex configurations with the formation of internal corners at the joints, the installation of boards and bars is carried out in accordance with the geometry of the roof and taking into account the manufacturer's requirements for a step between rows. The frame of a hipped roof is built in the same way.

The sheathing of the gable roof is the same on both sides

Lathing in the valley area

The valley is the inner corner of the roofing system. This area experiences much greater loads than the rest of the roof area, since water flows through it, in winter it withstands a large mass of snow, and in summer it heats up more in the sun. So that there are no leaks in this place, the valley device must be approached with special responsibility. An additional layer of waterproofing material is laid on the inner corner. The counter-lattice is nailed in increments of no more than 10 cm, while the beam should not be closely attached to the flooring of the valley, as this will negatively affect ventilation and condensate removal.

The lathing of the inner corner of the roof is carried out with half a smaller step than on the rest of the roof area.

Under the valley, most often they arrange a continuous crate

Counter-lattice under the metal tile

The purpose of the counter-lattice under the metal tile is to create a gap for the passage of air in the under-roof space. The structure is mounted on top of the waterproofing, resulting in an open space for air.

Do I need a counter-lattice under the metal tile

The advantages of the counter-lattice are as follows:

roof ventilation is provided;
the formation of mold and fungus on the elements of the roof structure is excluded;
rotting of wooden roof elements is prevented;
condensation does not accumulate on the reverse side of the roofing material.

It follows from this that the installation of a counter-lattice under the metal tile is mandatory. The design, in addition to the listed positive points, allows you to correct the irregularities that were made during the construction of the truss system.

The counter-lattice creates a gap for ventilation in the roofing pie and allows you to correct uneven installation of roof trusses

Counterbar thickness

Basically, a bar with a section of 30x50 mm and a length of 135–137 cm is used for the installation of a counter-lattice. Such lumber is used for the construction of a simple roof. If a sloping roof is being erected, the cross section must be increased to 50x50 mm. The distance between the elements of the counter-lattice along one rafter leg should not exceed 30 cm.

Installation instructions

Having prepared the bars of the required size, you can proceed with the installation, which is performed in the following order:

Waterproofing under metal roofing

During the operation of the house, condensation forms under the roofing material, which leads to rotting of the elements of the wooden structure and wetting of the thermal insulation. Moisture adversely affects the wood and leads to its gradual destruction, which may require serious repair costs. To protect wooden products and insulation from condensation, waterproofing is used. The choice of material for waterproofing depends on what kind of roof is planned - a cold attic or an insulated attic.

Instead of modern materials, you can use the well-known roofing material. However, it is in many ways inferior to new waterproofing products. Ruberoid is characterized by a short service life, burns well and emits a pungent odor when heated. If you listen to the opinion of experts, then you should not use roofing felt as a waterproofing under metal tiles.

Video: waterproofing device for metal tiles

Proper installation of the sheathing under the profiled tiles is the key to high-quality roofing. To do the job correctly, you need to familiarize yourself with the nuances of the frame device for the roofing material. Only in this case it will be possible to avoid errors in the installation of metal tiles and prevent problems in the future.

To install a roof made of metal sheets and tiles, a special frame is required. Installation of the crate under the metal tile is easily done by hand, if you have all the necessary building materials and instructions.

Design features of the crate under the metal tile

The frame, crate or carrier system is the most important factor of all that affects the durability of the building. If you decide to install a roof made of metal, then you should immediately be prepared for difficulties, because when working with other roofing materials, one optimal gap between the beams or the cross-sectional area is allowed.

Photo - the principle of installation of metal tiles

Features of the crate under the metal tile:

You can mount the frame in two ways: solid or in increments. In the first case, the boards are installed almost close to each other, i.e. no gaps at all. This is necessary because of the peculiar structure of the metal tile and the principles of its installation. In the second, you need to make a gap, the distance of which will be at least 350 mm, this method is good for large tiles, but is mainly used for corrugated board;
You need to be very careful about the choice of bars and boards. Most often, a wooden beam with a section of 50 mm is used, and a board with dimensions of 32x100 mm;
Before starting work, it is necessary to treat wooden surfaces with special antiseptic compounds. When laying metal tiles, there are often some gaps or crevices that moisture will penetrate into. Condensation will cause mold to develop in the frame or wood rot;
Each metal tile has its own unique wave. When installing the frame, you need to carefully study the purchase and only after starting the construction of the carrier system;
Do not forget to cover the tree with a layer of hydro and vapor barrier;
The first board of the frame is slightly wider than the rest, about one and a half centimeters.

Photo - the difference between solid and gap battens

Many manufacturers of metal tiles have their own requirements for the installation of the coating. If there are any, they will be indicated on the box with the building material or in the installation instructions that come with the purchase.

Photo - a general view of the crate under the metal tile; a general view of the crate under the metal tile

How to make a crate with your own hands

Our installation instructions can be used by both professional builders and novice craftsmen. Let's first consider installation option for crates with a step. To get started, you need to draw up a plan of action. Also pay due attention to the drawing, with it the process will go much faster, because. it will immediately be clear what needs to be taken on in the first place, and what sizes of beams are needed:

It is necessary to cover the roof with waterproofing material. This will be required so that the tree does not collapse under the influence of condensate, which rises to the ceiling of the dwelling. A layer of such a film must be passed under the drainage system during installation;
Directly on the waterproofing layer, you need to install a beam of the selected section. Let's take 50 mm as an example, i.e. bar with parameters 50x50;
To the common truss system, the beams must be fastened with self-tapping screws. It is not advisable to use nails - they destroy the structure of the tree and contribute to a decrease in its durability, but if you have opted for them, then it is better to choose large slate nails;
After that, an edged board is mounted to the bars. It needs to be laid with a certain step. Carefully study the installation instructions for the selected brand of metal tiles - some manufacturers do not allow the installation of building material on the crate in increments of less than 30 cm;
Next, two more beams must be fixed to the rafter beams, which will serve as a support for the ridge of the metal roof. They must be installed at a distance of no more than five centimeters from each other;
We remind you that for a roof that will be covered with metal tiles, the optimal design is a gable. With such an organization of the roof, it does not overload the foundation and looks stylish in any exterior;

After fixing the boards, you can proceed with the installation of metal tiles. It also needs to be installed using self-tapping screws and special tools. The metal roof pie in this case will look like this:

Photo - Roofing cake

If you want to make a crate for a metal tile with gap-free installation then detailed instructions are provided below:

The roof is also covered with a layer of waterproofing material. At this stage, you can make another layer - a vapor barrier surface. It is very important to stretch it without seams, otherwise water will still penetrate under the roof;
After we install the bars. Unlike the first method, they need to be mounted without a gap or with a minimum (as many builders do in order to save building materials). Fasteners are made with self-tapping screws with wide heads using a screwdriver;
On a layer of beams you need to install boards for crates. If you have chosen a non-gap installation of the crate under a galvanized metal tile, then most likely you have a material with a small wave. You don’t have to worry about the complexity of covering the frame - the tile will lie beautifully and tightly due to the universal corrugation;
Similarly to the first method, it is time to install the ridge board. To do this, two beams are installed at the top point of the roof at a distance of five centimeters from each other;
This technology is suitable for a small house, utility room or building with a solid monolithic foundation. It must be remembered that the metal tile itself is quite heavy, and the continuous crate is another factor that makes the entire structure heavier.

Photo - Roof frame made of metal tiles

To calculate whether it is possible to use such a carrier system on your house, you need to contact the design office for help and order a project there. With this approach, you will immediately receive not only detailed installation instructions, but also recommendations for choosing a building material.

Video: do-it-yourself installation of the crate

Calculation of the estimate

To install the crate for metal tiles, you need to stock up on the following details:

Self-tapping screws construction and mounting nails (if necessary);
Manual cordless screwdriver;
Special walkways and ladders, climbing equipment for high-altitude work - all this will help you move along the roof surface;
Wooden boards and beams, bars for the ridge;
Metal tiles;
Paints and varnishes. Primer, sealants, antiseptics, grout for metal tile attachment points;
Additional elements - gutters, snow retainers, collars for chimneys.

It is also very important to remember about the need for insulation. Of course, a crate for a cold attic does not imply an additional layer of thermal insulation. But if you have a house without an attic or this room is used as a living room, then you need to take care of this factor.

Photo - crate for metal tiles with insulation

On construction forums, home craftsmen recommend working with self-tapping screws with gaskets so that they do not scratch the surface. After installation, each self-tapping screw must be treated with a special primer, sealant and, if desired, paint (so that the fasteners do not stand out on the common surface of the roof). Every six months, clean the roof of dirt: leaves, dirt. In winter, you need to clean off the snow layer so that it does not form additional pressure on the house.

Metal tile is one of the most common roofing materials. Made mainly from thin steel(although there are types of metal tiles made of copper or aluminum), stamped in such a way that the finished product takes on the appearance of a classic ceramic tile, the use of which has been proven by centuries of experience.

The surface of each sheet is covered with a special protective layer of a polymer-metal coating that reliably protects the material from corrosion - the declared service life is 15-60 years. looks very solid and elegant. The weight of the material is approximately two times lower than that of slate, which allows you to use lightweight and reduce the load on the load-bearing elements of the building.

With a well-executed installation, there are no problems, although there are disadvantages: relatively high cost, the possibility of corrosion, the risk of condensation and good sound conductivity - during rain, the roof is quite noisy. When installing, these points must be taken into account and, if possible, try to mitigate the negative impact. In this article, you will learn how to make a crate for a metal tile and how to correctly calculate the pitch of the crate.

Fixing the cover with self-tapping screws

How to make a crate for a metal tile? We will talk about this further.

Do-it-yourself installation of the crate under the metal tile

The roof lathing under the metal tile is made from the lower edge of the roof in a certain sequence. We bring to your attention - installation of a crate for a metal tile (step by step instructions).

, fastening it to the rafters with the help of rails of the same thickness. They are usually cut from the same board that goes to the crate.
The last row of the crate is attached to the slats, carrying drains and cornice strips.
The next row of the crate is installed, the wave step is measured from the edge of the first row to the middle of the second.
Subsequent rows are set with calculation of the wave step from the middle line of the board.
The installation of rows of battens alternates with the installation of a waterproofing film. It is necessary to monitor the tightness of the insulation, glue the joints of the canvas with adhesive tape.
Wall junctions are reinforced with an additional row of planks. Attached to them (skate, corners, etc.).
Constantly monitor the condition of the rows, avoid deflections, waves and other curvatures. If necessary, put slats under the boards, wedges, leveling the row.

Roofing pie metal tiles

Important! It is necessary to constantly carry out all available operations to control the preservation of the substrate plane, this will help eliminate deflections and increase the life of the roof.

Waterproofing and vapor barrier of metal tiles

Metal roofing is most dangerous due to the possibility of condensation. In this regard, no measures will be superfluous, since the wetting of the truss system and the roof itself will disable the roof in a short time. You will have to completely change all the elements, which means high costs and labor costs. Therefore, it is important to competently produce hydro- and vapor barrier of the roof.

The main condition will be the provision between the waterproofing film and the actual roof. This will enable the evaporation of moisture, the release of steam through the membrane, and will contribute to preservation.

The movement of air is provided by the crate for the metal tile, which creates a sufficient gap between the layers and guarantees the absence of points of contact.

CAREFULLY!

Waterproofing of metal tiles is advisable even if the attic is non-residential, since water vapor is constantly squeezed out of the internal space of the house, which will gradually affect the roofing material. The presence of a cut-off will allow it to be removed without contact with the metal, excluding corrosion.

Useful video

We invite you to watch a thematic video on self-installation of the crate:

Conclusion

In conclusion, it should be noted the importance of competent and accurate installation of the crate under the metal tile as an element responsible for the safety and efficient operation of the roof as a whole. The service life of the roof depends on the quality of the crate, to some extent - the load on the walls and the general condition of the building. Responsible attitude to the installation of the battens will avoid unnecessary labor and costs and guarantee the most efficient operation of the roof.

When arranging a roofing pie, you can’t do without a crate. But when installing it, there are many subtleties. What material to choose, with what step to install and how much sheathing will be required on the roof? These issues need to be dealt with before the start of installation work. Features of the roof will depend on the chosen coating. You can make a crate for a metal tile with your own hands.

The crate under the metal tile is a cut board, which is installed with a certain step for fastening the roofing sheets. And their thickness is determined in accordance with the angle of inclination of the slope, the pitch of the rafter legs, and the height of the snow cover.

Coniferous trees can be used as material. Pine boards are the most common.

The scheme of the flooring of the crate must be selected before the start of installation work. Its type will depend on various parameters:

If there is a heated under-roof space, in addition to waterproofing, laying a counter-lattice will be required, which will create a ventilation gap. Such an event will ensure the removal of water vapor from the insulation.
The counter rail is not needed when installing the lathing on a cold roof. In this case, waterproofing is used in the form of a film laid on the rafters, which will provide additional protection of the under-roof space from snow and rain, which can get under the joints of the metal tile, ridge or cornice overhang under the influence of a strong wind.

The step of the crate will depend on the type of metal tile. Different manufacturers offer different cell sizes. These recommendations should be indicated in the instructions for the purchased roofing material.

So, for example, for a Monterrey metal tile, a crate with a step of 35 cm is required, and for Maxi - 40 cm.

The crate must be installed without violating the required step. Otherwise, errors can lead to problematic installation of roofing.

The process of installing the crate under the metal tile must be carried out strictly in certain weather. Should be dry and windless. This will ensure the safety of high-altitude work, as well as eliminate the need for additional protection of lumber from getting wet.

For work, you can also use moisture resistant plywood and OSB boards. Such a crate will create additional strength and give reliability to the roofing pie. The same effect can be achieved by installing a continuous crate of edged boards. But it should be noted that this significantly increases the consumption of material and the weight of the roofing cake.

Material selection

It is better not to save on the material of the crate, which is planned to be laid under the metal tile. As a flooring for such a roofing, only a cut board is suitable, which is of high quality and good drying.

Selection options:

The first and, perhaps, the most important requirement relates to the thickness of the crate. The best choice would be a value of 32 mm, but it is also allowed to use edged boards of at least 25 mm. It is best to independently calibrate the spread of boards in thickness, which should not be more than 2-3 mm, before purchasing the material. in one party.
If the variation in thickness exceeds the required value, then the use of such boards will affect the formation of inconsistencies in the sheathing on the rafters. And the laying of metal tiles will be uneven, the risk of wave formation is high.
A suitable board width is from 10 to 15 cm.
Different lengths of sheathing boards are allowed, but it is more convenient to use the corresponding step of the rafter legs. In this way, waste generation can be minimized.
A planed board will cost more and is not at all necessary for work. The minimum deviations in thickness will have edged unplaned boards, sawn on a good band sawmill.
Before installation, the crate is treated twice with a flame retardant and an antiseptic to prevent fire and decay.

The most suitable thickness of the boards for the sheathing will depend on the step with which the rafter legs are installed. Accordingly, the larger it is, the thicker the boards will be required. For example, with a rafter pitch of 90 cm, a crate with a thickness of at least 32 mm is used. And for a step of 60 cm, 25 mm boards are suitable.

Features of installation work

For example, we will consider mounting sheathing boards on a roof with insulation, because this is the most difficult option:

Before laying the flooring, some preparatory installation work must be carried out. Waterproofing is placed under the metal tile coating, and it must be fixed with a stapler to the rafter legs. The anti-condensation film is overlapped. Work is carried out by moving from the bottom up the roof. In this case, a suitable overlap width will be a value of at least ten centimeters.
Next, we proceed to stuffing the counter rail. She has another name that reflects the purpose - the ventilation rail. For this, a wooden edged beam with a section of 32x50 mm is suitable. You can also use boards with parameters 32x100mm.
The counter rail must be laid, stepping back from the overhang from 15 to 20 cm, and leave the place where the first crate board will be fastened. The starting board must be selected with a thickness corresponding to the sum of the thicknesses of the batten and the counter rail.
In the case of installing the first crate on the counter rail, its thickness should exceed the ordinary elements by 10-15 cm. This will avoid the formation of a hanging protrusion on the edge of the overhang.
Proper installation of the starter board will require special attention during installation. It must be nailed to the end of the rafter leg, positioning in a straight line. Do this throughout the cornice overhang. Next, with the help of screws, you will need to fasten a vertical board, which is also called a frontal board, and a metal cornice strip.
The gutter is fastened to the frontal board.
The first sheet of a metal-tiled roof is laid in such a way as to provide a protrusion of 3-4 cm beyond the edge of the cornice strip. This will ensure that snow and rain directly enter the gutter without the possibility of flowing into the under-roof space.
The most difficult thing is to properly arrange the overhang. Further fastening of ordinary boards of the crate is carried out using self-tapping screws or nails to the surface of the base, parallel to the starting board.
With any option for fastening the boards of the crate, fasteners should not be allowed to stick out. And their placement should be in the center of the board. When working with self-tapping screws, it is necessary to correctly tighten the gaskets.
In order not to be mistaken with the distance of the crate step and to simplify the work on constant measurement, you can use templates. For this, two slats of the appropriate length are suitable. They need to be applied to the bottom board, and on the upper part it will be possible to align the next board of the crate.
When working with the laying of metal tiles on the ridge or pediment sheathing, it may be difficult to see the fastener points. The sheets will cover the flooring. If the step of the boards of the crate deviates even by a seemingly insignificant couple of centimeters, you can simply miss the placement of the fasteners. The result is a defect in the form of a through hole to the roofing.
Another difficult moment in fastening the boards of the crate is the ridge part. It is necessary to take into account, in addition to the main fastening of the metal tile sheet, the installation of a special profile that will cover the joint along the entire length. In order to ensure such an installation, floor boards of increased width are used. Let's say another option is to install two narrow purlins end-to-end.

If there are additional elements on the roof, for example, snow retainers or stairs, reinforcement of the crate will be required. This can be done by installing additional support boards.

Compliance with the following important rules guarantees you the correct installation of the crate:

In the place where the crate adjoins the ridge, pipe, skylights or valleys, its step is reduced to a maximum of one centimeter. For these places it is more rational to use a solid crate.
Gutters, as a rule, are mounted on brackets, which must be installed before the installation of metal tiles begins. The same swings the eaves plank.
An anti-condensation film will help protect the insulation from moisture. It is laid without tension, and the minimum sagging is allowed at one to two centimeters.
To compensate for linear expansion with a constant change in air humidity, the crate of sheet material is made with a gap of 3-5 mm. It is also necessary to shift the ordinary sheets relative to the first one by a distance equal to half the width. This will increase the strength of the rafter system.

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