The roof is one of the main enclosing structures of the house, serving to protect the interior from wind, cold and precipitation. Therefore, the choice of roofing material and the implementation of roofing work should be treated with special attention. Let's consider how to cover a metal tile if the work is done on its own.
Why metal tiles?
This roofing material is one of the most popular among the owners of private houses, due to its advantages:
- Metal tile Cascade- the material is quite durable and, at the same time, lightweight. That is, the created coating will be reliable, but at the same time, it will not be necessary to build a reinforced truss system, and installation will not require the involvement of equipment.
- The metal tile allows you to create coatings that are attractive from an aesthetic point of view. Externally, the roof looks like it is covered with real tiles. A wide range of colors of the material and a variety of textures allow you to solve almost any design problem. The coating does not fade under the action of the sun, so it will look just as attractive in a few decades as it did immediately after installation.
- The metal tile allows you to create durable coatings. When using high-quality material and observing the installation technology, the roof will last at least 25-30 years.
- Metal roofing is a relatively inexpensive material. In addition, if you do the work yourself, you can significantly save on installation.
There is an opinion that metal roofs are cold and noisy, that is, when it rains in the house, drops hitting the metal will be heard. But these shortcomings are reduced to zero if the installation of the metal tile was done correctly.
And proper installation involves not only laying roofing material, but also creating a multi-layer structure, which includes a layer of insulation and waterproofing. Properly assembled roofing "pie" perfectly retains heat and muffles sounds.
How to choose quality material?
Today, metal tiles are offered by many manufacturers. How to choose a really high-quality material and what to look for when choosing? First of all, you need to look at how long the manufacturer gives a guarantee.
Of course, the warranty period is not equal to the service life of metal tiles (as a rule, high-quality material lasts about twice as long as the warranty period declared by the manufacturer), but, nevertheless, the longer the warranty period, the more reliable the material.
You need to pay attention to the following characteristics:
- metal thickness;
- Zinc content;
- Type of polymer coating.
As a rule, steel with a sheet thickness of 0.5 mm is used for the production of metal tiles, since this value is recognized as optimal. If the material is manufactured in accordance with GOST, then the maximum deviation in steel thickness is allowed within 0.05 mm.
The European ISO standard has more stringent requirements, here the maximum deviation is within 0.01 mm. Therefore, you should pay attention to what standard the metal tile is made to.
Zinc coating is necessary to protect steel from corrosion, so such an indicator as the zinc content indicates the reliability of the material.
Today, manufacturers can offer metal tiles with a zinc content of 100 to 250 grams per square meter. Naturally, the higher this indicator, the more durable the material.
And the last nuance is the type of polymer coating. The cheapest samples of metal tiles are coated with polyester. The service life of such material, as a rule, is 10-15 years.
If there is a desire to purchase roofing material that will last 30 years or more, then you need to choose a polyurethane coating of metal tiles. This polymer is very resistant and retains its color throughout its entire service life.
Metal tile installation technology
Roof measurement
It is necessary to start roofing work with measurements of the roof and checking the correct shape of the slopes. By measuring the length and height of the slope, it will be possible to calculate how many sheets of metal tiles are required.
At the same time, it is important not to forget that overlapped sheets are laid, therefore, when calculating, they take into account not the actual width of the sheet, but the working one. In addition, we must not forget about the overhangs on the cornices, they are usually 4-5 cm.
Waterproofing
Before you start building a crate for fixing sheets of metal tiles, you need to take measures to waterproof the roof and insulate it.
Waterproofing films are attached to the rafters (or counter-lattice) so that there is a gap between the waterproofing and the insulation, which is necessary for ventilation. Only when using modern effective membrane films, this gap is not necessary.
In order to have conditions for air circulation in the under-roof space, the waterproofing layer is not brought to the ridge, leaving a gap of about 40 mm. On the slopes, the film is laid with an overlap (width 150 mm), the joints of the panels are glued with adhesive tape.
On top of the waterproofing, the bars of the counter-lattice are stuffed.
crate
If it is planned to cover with metal tiles, then the crate is assembled from boards measuring 32 × 100 mm. The boards are pre-treated with antiseptic solutions that help prevent the destruction of the material.
The pitch of the crate is chosen depending on the type of metal tile: it must correspond to the pitch of the waves on the sheets. Yes, on metal tile "Monterrey" this step is 350 mm.
The first board of the crate, located at the eaves, should be 15 mm thicker than the others, since an overhang will be mounted in this place.
Rules for working with metal tiles
- Metal tiles should be handled with care, they should not be thrown and crushed during unloading.
- If the material requires long-term storage (more than a month), then store it in a dry room with good ventilation, laying it with slats to avoid deformation.
- The edges of the metal tile can be quite sharp, so it is better to work with it with protective gloves.
- If you need to cut the sheet lengthwise, you can use metal shears or an electric circular saw. Cutting sheets with a grinder is prohibited, since when using abrasive wheels, the protective layer of the material burns out and the steel quickly rusts. When cutting the material in the transverse direction, it is not recommended to use metal shears, as this tool can damage the profile.
- The metal tile is fastened with the help of special self-tapping screws equipped with rubber washers. Only when using high-quality self-tapping screws, the coating can serve for a long time, since branded self-tapping screws have the same service life as the metal tile itself.
Installing a profile
Consider how to properly cover a metal tile:
- Before laying the sheets on the overhangs, a cornice strip is stuffed. At the locations of the internal corners formed by the intersection of the slopes, lower valleys are placed, and near the chimney pipes, internal aprons are mounted.
- Laying sheets starts from the roof overhang.First, one sheet is laid and temporarily strengthened with one self-tapping screw. Then, next to the stacked sheet, the next sheet is laid (with an appropriate overlap) and fastened to the first one. This is how a block is assembled, consisting of three or four sheets connected to each other.
- The block is aligned with the cornice and overhang, and the sheets are attached to the crate.
Advice! When installing metal tiles self-tapping screws for metal tiles should be screwed into the place of the deflection of the wave. Eight self-tapping screws are consumed per square meter of coverage.
- After installing all the sheets, mount the ridge strip, having previously installed the sealant, between the strip and the sheets of metal tiles.
- The ends of the slopes are closed with end strips. If a cut of the metal tile is located at this place on the lower bend of the wave, then the material must be slightly bent to prevent moisture from getting under it.
- Next, external valleys are installed, external aprons are mounted, roof ladders, snow retention elements and other accessories are installed.
Advice! Walking on a roof covered with metal tiles should be done very carefully, without stepping on the crests of the wave, so as not to crush the profile. For work, wear shoes with soft soles.
conclusions
The technology of laying sheets of metal tiles is simple, two people can easily cope with the laying of sheets. The main component of success is accuracy in work and adherence to technology.
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