Metal profile for the roof. Metal profile for roofing: classification and basic installation rules. How to cut sheets to the desired size

Metal profile, or otherwise, profiled sheet, corrugated board, is widely used in industrial construction for cladding walls, roofs, and fencing. Recently, private developers have also paid attention to it, as a cheap and practical roofing material. Externally, the profiled sheet looks like a corrugated metal sheet. The shape of the corrugation, its height and frequency can be varied, it is it that gives rigidity to the sheet. A metal profile is made from galvanized steel sheets with a protective coating of polymeric and paintwork materials.

The main advantages of a metal profile as a roofing material include:

• low cost with a sufficiently high reliability due to the strength of the metal and protective coating;
• ease of transportation without the accompanying "fight" and ease of installation that a non-professional can handle;
• low own weight with sufficiently large sheet sizes, which makes it possible to facilitate the roof structure using beams of a smaller section;
• great design choice: a wide range of colors, depending on the polymer coating, a variety of shapes and flexibility of the sheet, allow you to create a roof of an individual look.

It would be useful to mention the shortcomings of the metal profile, which are few, but they are significant:

• low heat and noise insulation like any metal. During the construction of the roof of a residential building, this can be easily eliminated by installing a heat-insulating layer that also performs the function of sound insulation;
• in case of damage to the protective coating loss of anti-corrosion properties. For a roofing metal profile, the risk is small, since the protective coating is designed for hail and accidentally fallen tree branches;
• obligatory bias roofs - at least 10 °.

How to cover the roof with a metal profile?

When calculating the required number of metal profile sheets, it should be borne in mind that the sheets are overlapped: in the horizontal direction by one or two waves, and in the vertical direction, the overlap depends on the slope angle - the smaller the angle, the greater the overlap. So, with a slope angle of 15 °, the overlap of the sheets is 20 cm.

as fastening material self-tapping screws are used. Their distinguishing feature is the presence of a colored neoprene gasket under the cap, which ensures a tight seal of the hole. You will also need roofing shears and a circular saw.

The procedure for carrying out work when installing a roof from a metal profile:

1. installation of a truss system;
2. laying waterproofing;
3. laying counter-lattices and battens;
4. installation of corrugated board;

As a waterproofing layer rolled roofing material or ondulin is used. It is laid from the eaves to the ridge with an overlap of about 15 cm and obligatory sagging. Separately, it is worth mentioning the insulating layer, which is laid out from mineral wool. It can be laid out both during the construction of the roof, and from the inside from the side of the attic. Which option is preferable? When constructing a new building, it may be necessary to carry out all the work together with the installation of the roof. In this case, a vapor barrier layer, for example, a film, is laid under the waterproofing layer, then a thermal insulation layer. Later, sheathing is performed from the inside of the attic.

The crate is installed depending on the angle of the roof slope and the grade of the metal profile. In general, we can say that the smaller the roof slope (angle of inclination), the smaller the crate step and the greater the amount of fasteners should be. The average step of the crate is 40-60 cm. The rafters and the bars of the crate should be treated with an antiseptic solution. If roofing work is carried out as a replacement for a slate roof with a metal profile, then it is not necessary to arrange a new crate, the old one will do.

Installation of corrugated sheets is carried out from the cornice upwards, each laid sheet is fixed immediately. How to lay out corners, gutters and a skate, you should consult a professional or look into special literature.

Finally, practical advice: purchasing a metal profile from specialized companies, you have the opportunity to purchase all the metal components necessary for the installation of a roof, including ribs, a ridge and a cap for a chimney.

Today we will figure out how to choose a roofing metal profile and make a reliable and durable roof. Follow all the recommendations outlined in the review, and you will be able to do the work no worse than professional builders.

If you do the work yourself, then in addition to the installation itself, you will have to perform a number of other actions: surface preparation, construction of the crate, purchase of materials and calculation of their quantity. We will break the whole process into separate stages and consider them in the order of execution.

Measurements and calculations

Before proceeding with any actions, it is necessary to carry out a number of preparatory activities:

Illustrations	Description of works
	Measure the height and width of each slope. To work, you need a tape measure of sufficient length and an assistant. You should not rely on information from the project, the actual indicators often differ from those indicated in the plan.
	Diagonals are measured. This is necessary in order to find out if the slopes are even and if there is a violation of the geometry in the roof structure. The diagonals must match, if there are discrepancies, all problems must be eliminated before work begins.
	The slope of the roof is determined. This is a very important aspect, since the calculation of the necessary materials and the design of the base to be made depend on it. Measurements do not require absolute accuracy, you must determine which gap from the diagram your roof belongs to.
	The approximate amount of materials is calculated. With a slope of less than 15 degrees, a continuous flooring is made, on which the crate is stuffed in increments of 300 mm, if the slope is greater, then the crate pitch can be from 450 to 600 mm. If you have overlapping sheets, then do not forget about the margin for joints, they are large enough. Waterproofing is laid under all types of structures, when calculating it, take into account an overlap of 100 mm at the joints.

If it is possible to close the entire slope in one piece, then it is better to do just that. Although it is less convenient to lift long elements, the roof is much more reliable and durable.

Required materials and tools

First, let's figure out how to choose and calculate a metal profile.

Here you should be guided by the following recommendations:

• Sheet length. It should be 50 mm longer than the length of the slope so that there is a slight overhang. As for the overlaps on the joints, on roofs with a slope of up to 15 degrees this figure is 300 mm, with a slope of 15 to 30 degrees - 150-300 mm, with a slope of more than 30 degrees, the overlap should be 100-150 mm;
• Sheet width. It is worth remembering that a corrugated sheet has two sizes: actual and useful width. Actual - these are the real parameters of the element, useful - the width that closes when the sheets are joined. It’s easy to understand here: the useful size is always 50 mm smaller than the real one;

• wave height. For roofing, it is best to choose options with a wave height of 10 mm or more. The most popular are profiles from 20 to 45 mm, they look good and have high strength;

• Manufacturer. Choose products from well-known companies that are well known in the market. No need to try to save money by buying products of unknown origin. The price may not be much lower, but the quality differs very much, I have met a professional sheet many times, which begins to rust in a year or two due to improper manufacturing technology and savings on the quality of the coating;

• Colour. This aspect is not related to quality, but it greatly affects the appearance of the house. The roof should be combined with the facade, so choose the shade that best suits the overall design, and will not look foreign;

• Material thickness. A very important criterion on which the strength and durability of the roof depends. There are a lot of products on the market made of sheet with a thickness of 0.4-0.45 mm, they are inexpensive, but they also have the appropriate quality. I recommend purchasing options made of metal no thinner than 0.5 mm, but in general, be guided by the principle "the thicker the better."

In addition to corrugated board, other materials are also needed, their list is as follows:

• OSB sheets. They are necessary if the angle of inclination of the roof is less than 15 degrees to create a continuous flooring over the structure. If the slope is greater, then this material is not needed;

• Anti-condensation film. It is laid under corrugated board and prevents the formation of condensate, which is very important, because metal surfaces begin to rust with constant contact with moisture. Usually the material is sold in rolls of 75 square meters, when buying, do not forget about the overlap at the joints, which should be at least 100 mm;

• Board 25x100 mm. It is used for the construction of crates for corrugated board. You can use thicker options, but thinner ones are not worth it because of their low strength;

• Fasteners. The film is fastened using construction brackets. The crate is fixed with wood screws, and the profiled sheet is fixed with roofing screws. This type of product is painted in the same color as the base material and has a washer with a rubber gasket to reliably protect the holes from moisture;

• Ridge and end elements. To close the ridge and the junction with the gables, special products are used. It is worth choosing the extensions of the same as the main material.

To work, you need the following tool:

• screwdriver. It is used to drive self-tapping screws. For conventional fasteners, a PH2 nozzle is needed, and for roofing, a M8 hexagonal nozzle is used;

• Metal shears. Can be used both electric and manual. It is better to choose a tool for curly cutting so that the handles are located above the plane of the material, so it will be more convenient for you to work;

In no case do not cut the corrugated board with a grinder. From this, the edges overheat, and the ends begin to rust in a short time.

• Construction stapler. With its help, the fastening of the membrane material will be quick, and the quality of work will be high;
• Hacksaw. With its help, the elements of the crate are cut.

How to carry out work

Installation of a roof from a metal profile is carried out according to a certain scheme. The work instructions look like this:

Illustrations	Description of works
	Vapor barrier attached. The material is spread horizontally from bottom to top; Fastening is done using a stapler, it is not necessary to tighten the membrane strongly, it should sag by about 2 cm; At the joints, overlaps of 100-150 mm are made.
	The crate is attached. It can be fixed directly to the rafters, or you can fix a counter-lattice bar to create a ventilation gap. Laying of the crate is carried out in increments of 30 to 60 cm; To observe the exact location step, cut the bar like a pattern and line up the elements on it before fastening.
	The material rises. The metal profile on the roof must be raised so as not to damage the sheets. For this: a frame is made, as shown in the figure, on which a profiled sheet is laid and then rises to the top; use gloves during work, as it is very easy to cut your hands on the edges of the material.
	Fastening is made. The profiled sheet is exposed on the roof, remember that the material should protrude 30-50 mm on the overhang. Self-tapping screws are screwed strictly vertically so that the washer is evenly pressed against the material and protects the attachment point; First, you can fix the element on several fasteners to put it in the desired position.
	Final fixing of sheets. Top and bottom screws are twisted into each wave. In the middle, they are located through the wave with a step of 50 cm and are screwed according to the location of the crate.
	The horse is attached. To do this, first, a foam rubber tape is glued to the surface, which has a profiled flooring configuration (it is sold together with the ridge); The skate is fixed with self-tapping screws every 30 cm; At the joints, laps of 50 cm are made and fasteners are screwed through the connection on both sides.
	Attached wind deflector. Elements are placed from the bottom up and fastened on both sides - both to the end board and to the corrugated board. Moreover, you need to screw the fasteners into the profiled sheet through the top of the wave to ensure reliability. Mounting step - 25-30 centimeters.

If you are changing the coating, then before you cover the roof, you need to remove the old roof, this stage is carried out before starting work so that precipitation does not damage the structure.

Conclusion

This article will help you choose high-quality material and carry out work without the involvement of specialists. The video in this article will visually show the important points of the workflow, helping to understand the topic even better. If you still have questions - write them in the comments.

How to cover the roof with a metal profile? The technology by which the profiled sheet is laid on the roof is not very complicated. The only thing that is required for this is to know the necessary features and rules for working with this material. It is not difficult to fix the corrugated board on your own, regardless of the type and configuration of the roof.

Do-it-yourself metal profile roof, as already noted, is mounted in compliance with the necessary technology and basic rules. Let's take a look at them.

First you need to make a high-quality crate, which will be durable and reliable, and on which it will fit.

Your attention! If the roof is gable, then the installation of the roof starts from the end, if it is hipped, then from the center of the hip. You also need to pull the cord along the cornice, along which the metal profile will be aligned. By the way, it is better not to align the flooring along the end of the slope.

The fastening of the metal profile on the roof should take place in the area of ​​\u200b\u200bthe ridge to the bottom of the crate for every second wave. If fastening occurs at the end edge, then fastening is carried out along the bottom of the profile in each bar located horizontally.

After that, the middle must be fixed with self-tapping screws in a checkerboard pattern. For reliable fastening, it is necessary to screw in 4-5 self-tapping screws per square meter.

It should be noted that the metal profile is attached only to the part of the wave located below, unlike slate.

A profile sheet for a roof with long slopes is made using the method of building up sheets that have an overlap of about 20 cm. The sheets are fastened simultaneously by nailing to the crate for each wave.

There are two methods that are most often used to make multi-row laying of decking from a profiled sheet:

• First you need to make a block of four profiled sheets. To do this, you need to lay the first sheet on the bottom row. Another sheet is attached to it from above, which will be the first in the second row. Another sheet is fixed on the bottom row, the same is done in the top row. Thus, four sheets are obtained on the roof. Then, next to it, with the help of an overlap, another of the same block is installed, and so on until the entire installation is completed. This method is most often used for roofing from a metal profile with a drain or drainage groove.
• How to do it in another way? A block is arranged, consisting of three sheets, which are stacked as follows: the first row is made of two sheets that are stacked and connected to each other. Then another sheet is attached to them, which is the first in the second row. After that, the block is aligned parallel to the cornice and fixed. Near it, another block is attached with an overlap, and so on until the very end. This method is used for fastening profiled sheets that do not have a gutter, since all sheets in the first row are closed with sheets of the next row.

Roof slope

How to cover the roof with a metal profile

When mounting roofs from a profiled sheet, you need to know the answer not only to the question of how to cover the roof with a metal profile, but also what angle of inclination the roof has.

In the event that the roof has a slope of less than 14 degrees, then adjacent sheets should be laid with an overlap of at least 20 cm. If the angle is increased to 15-30 degrees, the overlap can be reduced to 15-20 cm.

If the slope of the roof from corrugated board with your own hands exceeds 30 degrees, it is allowed to make an overlap of 10-15 cm. If you generally have a flat roof, the angle of inclination of which is less than 12 cm, then additional sealing of horizontal and vertical overlaps with silicone sealant will be required.

Directly mount

Roof covering with metal profile

It is best to fasten profiled sheets with special roofing screws to structures made of wood. At the end of such self-tapping screws there is a drill along with a polymer gasket. It is desirable that the self-tapping screw has a size of 4.8 by 35 mm.

In order to fix the skate, self-tapping screws with a length of 80 mm will be needed. When mounting such sheets, one should not forget to perform vapor and waterproofing, as well as provide a gap so that ventilation of the space located under the roof can be carried out.

It is worth noting that with constant heavy rainfall, damage to the roof can occur if it was incorrectly laid initially. To avoid this and not engage in constant repairs, you need to immediately answer the question of how to properly cover the roof with a metal profile.

Let's talk about why metal profiles are used for roofing. This material is made from steel sheets that are coated with a polymer and galvanized coating for protection.

The profiles acquire the required rigidity after rolling, carried out at different heights and configurations. It is noted that corrugated board is much stronger than analog wall materials.

The material is able to resist different loads due to the presence of additional stiffeners. Profile height can be higher than 20 mm. In order for the work to be done correctly and quickly, you need to do a few things.

So, how to cover the roof with a metal profile? Several rules.

• The slope of the roof has already been discussed earlier. It must be measured out very carefully, since it will depend on how strong the structure will be, and also whether there will be an unpleasant outcome.
• Then you need to calculate how many sheets you need. You also need to decide whether you need separate plates. Only after everything is taken into account, it will be possible to start preparing the material for work.
• After that, you need to pick up the sheets of the desired length. It is desirable that they be the same length as the slope, so that you do not have to carry out unnecessary work. In this case, it must be remembered that the length of the flooring should be 4 cm longer than the length of the cornice.
• Before starting installation, you need to check how flat the roof is. After that, the roof is covered with a layer of waterproofing, which will help the roof to serve without leaks for a long time.
• The next step is to lay out the rails, thanks to which air circulation will be achieved between the waterproofing and the corrugated board. It will also help protect the material from rotting and mold.

It is worth noting that profile iron for the roof is a very slippery material, so you need to be very careful when working with it at a height.

Now you should not have any questions about how to cover the roof. The main thing to remember is that in this case you need to think through each step in advance and complete all of the above points.

Among the variety of roofing material, there is a difficulty in choosing a high-quality and reliable material for your roof. Inexpensive roofing often turns out to be short-lived, difficult to repair and requires additional investment during the restoration of tightness, aesthetic appearance. Although all these problems can be fundamentally eliminated if you use a metal profile for the roof. Despite their practical price, these products are durable, easy to install and use, as well as excellent aesthetic quality that lasts a long time.

In this article

In what cases is a metal profile used on the roof

The metal profile is perfect for buildings of any category. It can be laid on the roofs of simple country houses that do not have a truss system, on the roofs of frame houses with lightweight walls and foundations. Light weight allows it to be used in buildings of various types, and thanks to the modern assortment, it is possible to choose a convenient option that is suitable for a house of any architectural complexity. This coating is suitable for residential buildings, and for outbuildings, garages, gazebos.

What is roofing material

This roofing is made from good quality steel sheets coated with zinc and polymer compounds, giving the product significant security benefits. A metal profile with a protective special coating is better protected from corrosion, due to the exclusion of contact of the metal surface with atmospheric humidity. This treatment prevents the appearance of scratches, and will also provide long-term color fastness. Therefore, such a roof is used in any climatic conditions.

Characteristics

Since the basis of the material is made of durable metal, the thickness of which is about 1 mm, the main coating weighs relatively little, which makes it easier to transport and install.

In winter and early spring, there is a danger of a large convergence of snow and ice from the roof of the house. This is due to the rather smooth surface, but also, of course, the slope of your roof. Layers of ice and snow during convergence can cause considerable damage: drains, fences, buildings that are nearby, cars. The main thing is that pets and members of your family can suffer. To prevent this, there must be snow retainers on the cornices.

Making the roof of a metal profile with your own hands

There is no particular difficulty in how to fix a metal profile on a roof. When laying, the sheets are fixed with self-tapping screws as much as possible in the lower part, which gives a density of alignment with the crate and the absence of deformations. During installation, self-tapping screws are covered by the top row of corrugated board, so the roof looks like a solid surface without distracting elements of protruding fasteners.

But there are other subtleties of installation that are learned with experience, so it is better not to engage in independent installation, but to invite professional roofers. Especially if there are many complicated areas on the roof. Do-it-yourself metal profile roof will require some calculations:

• Roof pitch measurement. The amount of overlap will depend on this. Laying a minimum overlap will require 200 mm.
• A slope angle of less than 12 degrees will definitely require additional sealing with sealants.
• Next, you will need to calculate the number of sheets used before covering the roof. When choosing the desired length, it should be borne in mind that the length of the flooring will be slightly longer than the length of the eaves.
• Before you properly close the roof, you will need to make high-quality hydro and sound insulation of the roof with your own hands.
• The final step will be laying out the slats, allowing you to achieve the effect of air circulation between the waterproofing and the metal profile. This greatly helps to protect your structure from rot and mold.

Pros and cons of installation

Buying a metal profile for a roof is a promising solution, since the service life is calculated to be more than a 20-year period of intensive use. Guaranteed to serve more than 50 years without requiring replacement.

But there are also disadvantages. So, poor-quality fastening of the metal profile on the roof reduces its sound insulation. To correct this error, various building materials are used that are suitable for the relevant parameters. Rain and hail knock on the metal, making characteristic, by no means quiet sounds. But this can be partially avoided if an additional layer of insulation and PVC film is made. But first you need to understand the reasons for the deterioration of sound insulation. And most often they are associated with poor-quality installation.

• Small roof pitch. This produces noise when precipitation occurs in the form of rain or hail.
• The uneven design of the crate and a small number of fasteners contribute to the appearance of "voids" (areas of poor connection with the crate). In these places, the metal profile roof begins to clap on the crate. And it is better to purchase self-tapping screws that are recommended by the manufacturer of roofing materials.
• Incorrect cutting of sheets and their overheating at the joints leads to significant deformation, which also affects poor adhesion to the crate. When installing a crate for a metal profile, the flaws in the rafter system must be eliminated so that the finished crate is perfectly flat, without bumps and depressions.

Noise Defect Elimination

As mentioned above, roof sound insulation is carried out with the help of special building materials, which must be selected competently and wisely. Insulating material is laid between the rafters. From above, it is limited to a crate. It would seem that everything is simple, but there is one "but". Soundproofing will not work at 100% if the influence of the so-called "acoustic bridges" is not eliminated. The rafters transmit the sound vibrations of the roof to the wall cladding. The result is a resonating surface, the vibration of which the insulating material is not able to reduce. This problem is solved by creating insulating gaskets, which can be made of polyethylene foam or ordinary felt. These gaskets are laid in two directions - along the rafters and on drywall.

One of the most common ways to cover the roof with additional sound insulation is a single-layer or two-layer laying of insulating material.

The quality of the material largely depends on the manufacturer, so it is worth studying the reviews of different companies. When choosing a coating, study its cut - it is better to take one with a thick layer of metal. Check for strength. Also check with the manufacturer how the material is stored in the warehouse. It is necessary that there are special separators between the sheets of metal.

To find out how to fix a metal profile on a roof, you need to understand the features of this material. The profile is made from galvanized steel sheets using cold rolling. During production, this material is covered with various protective layers, which makes it very reliable and resistant, so many people want to cover the roof with a metal profile. The corrugated board is treated with a specialized anti-corrosion phosphate, and then primed. The lower part is coated with a special varnish, applying a polymer coating to the surface.

Features of metal corrugated board

Steel sheets are galvanized to ensure proper cathodic protection of the entire surface and to give it anti-corrosion properties. Now corrugated board is a multi-layer structure, which is designed to withstand a variety of natural surprises.

Synthetic resin resins are organic polymers that are used during the production of polymer coatings. To give profiled sheets a more decorative look, they are supplemented with a variety of additives and pigments that perform important protective functions.

To get a wavy or trapezoidal configuration of the finished sheet, you must use a specialized device called a sheet bender. It provides the opportunity to choose the desired width or height of the waves, the main purpose of which is to add resistance to the entire roof.

It is known that a roof made of such a profile has many advantages, because this material is:

• durable;
• reliable;
• sustainable.

When planning to do most of the roofing work with your own hands, you should pay attention to this particular material, because, having understood the main nuances, it will be very easy to install.

How to choose the right material?

All corrugated board is conditionally divided into several classes, which are designated as follows:

• H - used only for fixed coatings, ceilings and formwork, it is considered the most suitable option;
• C - designed for walls, it is often used during the installation of fences;
• HC - combined, it can be used for fences or flooring.

It is very important to choose the most appropriate brand. It is clear that H is considered the most reliable and durable among all, its thickness is not too large, there are several additional stiffeners, and the corrugation itself is quite high. HC is also sometimes used for roofing, but this variety is more suitable for roofs that are not subject to heavy loads. The cost of brand H is slightly higher than C or HC, but all costs are quickly justified by the durability of use.

Profiled H can withstand just huge loads, so it is possible to increase the step between the battens. It turns out that you can use fewer fasteners and it will cost much less.

Speaking about the thickness of the flooring, you need to take into account some points. If the roof has a fairly high slope angle, then it can be covered with HC sheets, because they are a little thinner and much cheaper. However, if the roof is flat enough, then it is better not to save and not take risks. With a flat surface, the load on it increases significantly, so the larger the waves and the thicker the profile, the safer the whole structure will be.

What needs to be done before installation?

Before starting the installation of a roof from a metal profile, it is necessary to perform some more work, namely:

1. Calculate material. To determine the number of sheets, it is necessary to measure the roof slope, its battens, diagonals. Performing all calculations according to the drawings, it is necessary to duplicate all measurements in order to take into account the error if the roof is not rectangular. It works best if the length of the profiled sheet corresponds to the slope, then you do not have to provide additional sealing, and the fastening of the metal profile itself will be less laborious. During measurements, it must be borne in mind that all profiled sheets located in the first row must protrude 4 centimeters beyond the eaves.
2. Provide waterproofing and ventilation. Before fixing the corrugated board, it is necessary to ensure proper waterproofing by installing it throughout the crate. Laying a waterproofing layer is necessary to avoid the formation of condensation or leaks. Ventilation is installed so that moisture does not accumulate. There can be no exceptions here, ventilation with waterproofing must be arranged regardless of the steepness or flatness of the slopes. Between the waterproofing layer and the corrugated board, you must leave 2 centimeters. To do this, several slats are laid on top of the waterproofing. It is important to place them so that this layer of air can be freely ventilated from the cornice itself.
3. Select crate. Before starting work, it is necessary to take into account a very important point. If various additional elements are located in the roof itself: chimneys, ventilation shafts or fire hatches, it is necessary to strengthen the crate around with the help of additional bars. There are no standards regarding the thickness of the lathing, so it is possible to use many different combinations, which are influenced by the length of the screws or corrugated board. The main thing is that the cross section of the bars should be at least 32x100 millimeters. The board that goes along the eaves itself must be much thicker than the upper bars.