To make a quality roof from metal sheets, it is necessary to have a clear understanding of the technology of installation, have construction skills and own the basic working tool. Below will be considered the construction of the roof from metal sheets with their own hands.
Features of the material
Metal tiles are steel sheets with a thickness ranging from 0.35 mm to 0.7 mm. And the rigidity and stability of the roof directly depends on this indicator. Sheets are galvanized on both sides, the outer coated with a special compound, polyester or plastisol. Dimensions of metal roofing tiles are as follows: sheet width is usually 1 m, length varies from 1 m to 8 m.
The main advantages of the roofing material in question include:
- low weight (no more than 6 kg per square meter);
- ability to easily withstand temperature fluctuations;
- ease of replacing damaged elements;
- corrosion resistance (subject to certain conditions);
- reliability and long service life (up to 50 years);
- relatively low cost;
- color variety.
Rules of Arrangement.
When working independently on the creation of the roof, you must clearly follow the technology of installation of metal roofing. Allowed slope angle of at least 14 degrees.
When installing a gable roof, start laying from the bottom corner of the left side. The next sheet is superimposed on the previous one with an overlap of one wave. If a hipped roof is meant, the work begins at the highest point, gradually descending on the opposite sides.
The last metal sheets should be hung over the final board of purlins by about 5 centimeters. They are fastened with special screws of the appropriate color, with rubberized gaskets. The ridge is covered with special gaskets, over which the ridge metal element is installed.
A variety of additional elements of the roof brings with it the emergence of gaps, which must be sealed. For this purpose, silicone-based sealant, special sealing tapes are used.
Under-roof space is the place where the cold prevails and condensation can form. Therefore, it is necessary to make a quality roofing pie, taking care of proper vapor and waterproofing component, as well as ventilation.
To work you will need: a screwdriver with a bit for roofing screws, cutting tools, a special rail to maintain the same distance between the crates, a tape measure, tapping cord, marker, sealant, hammer.
Professionals do not recommend using an angle grinder to cut sheets, as it will burn the edges of the cut, can leave traces of hot dross on the surface. This will subsequently lead to corrosion of the metal.
Warm roofing pie.
Layers of the roofing pie must be arranged in strict sequence. The composition of the warm roof is represented by: rafter system, vapor barrier film thermal insulation layer, waterproofing, counter-battens, lathing and, finally, the metal roofing tiles.
The rafters and additional reinforcement of their load-bearing capacity constitute the framework of the roof. Vapor barrier releases steam from the room, it is attached to the inner side of the boards of purlins. Thermal insulation is placed between the rafters, for example, it may be mineral wool.
Waterproofing of the roof under the metal tile is necessary to prevent condensation, which falls on the back side of the metal. Lattice presses against the rafters waterproofing layer and creates the necessary ventilation gap between the waterproofing and purlins. Lath boards are nailed to the counter-battens, and metal tiles are attached to them with self-tapping screws.
Cold roofing pie
A waterproofing layer is laid over the rafters, which is previously secured with a construction stapler. Then the counter battens are nailed. The boards of the purlins are attached to it, and then the metal comes.
As in the case of a warm pie in this case also needs proper ventilation of the roof of metal. It is achieved through counter-battens, which gives a gap between the waterproofing film and sheathing boards.
For the considered roofing pie device additional vapor barrier layer is not required. The technology itself is used very rarely, because the roof without insulation gives large heat losses and poorly copes with noise. It is possible to insulate the ceiling, which serves as the ceiling of the house.
Installing a roof ridge
The knots of a metal roof need special attention. One of the knots is the ridge. If it is flat, the slats are attached with an overlap to each other. And the resulting gap should look in the opposite direction to the one from which the prevailing winds.
Semicircular ridge is fastened along the lines of the metal tile. When the slope is triangular or trapezoidal shape, the ridge bar is adjusted to the slope of the ridge, if necessary, it is bent or unbent.
Installing a valley.
Fixing the slats carried out with an overlap of 20-40 cm. It is necessary to move from the eaves to the ridge. The end of the bottom eave board is made under the ridge. A seal is made on the last slat near the ridge.
Sheets of metal suitable for the valley, cut about 7 cm from the axis of the laid slat. The valley itself is fixed with self-tapping screws, the cut edge of the metal is fixed in places of contact with the slat.
You can decorate the edges of the trimmed metal sheeting with special overlays. The latter are laid starting from the bottom of the roof, the overlap should be about 10 cm. Overlaps prevent the snow from blowing under the sheet cuts, simplify the rolling of water into the valley.
Nuances of chimney trim
After the arrangement of waterproofing around the pipe and on the entire surface of the slope, a special gutter is installed, which will act as a water drain.
The entire construction requires some general rules to be followed:
- Fixing the apron involves the use of a sealant;
- The apron itself must cover the top of the wave sheet metal;
- First attached to the inner apron, which is laid in the established gutter, then the outer.
Properly assembled roof of metal roofing is characterized by strength and durability. If you follow the technology of laying sheets, as well as the arrangement of the entire roofing structure, including insulation, you can get a perfect roof over your head. And your photo of metal roofing, posted on the network, will help beginners to cope easily with this stage of building your own house.
Photos of metal roofing