How to choose the material?
In order to know how to properly mount metal, you need to navigate in the types of material and choose one of the types for your roofing. All of them have different advantages and properties, so before buying any type of shingles you need to familiarize yourself with them and find the best option. Also important is the type of coating metal. As an external coating for it serve as pural, polyester, PVLF and plastisol.
- Pural is a glossy coating, easily tolerated by atmospheric precipitation and sudden temperature changes. Apply a layer of 25 microns.
- Polyester is a cheap substance based on polymers applied by a layer of 25 microns. Resistant to sunlight, which allows the tile for a long time not to fade.
- Plastisol is the most durable coating with a thickness of 200 μm. On the surface you can apply notches and reliefs to combat the "glare" of the roof.
- PVLF: 80% of the composition is polyvinyl difluoride, and 20% is acrylic. The coating has a thickness of 27 microns, it is durable, does not fade and is resistant to mechanical damage.
Note! The choice of type of coating should be based on the climatic conditions of your region.
Metal with a polymer coating can be both matte and glossy, and with colored stone powder. The matte coating is more expensive than the gloss, not to mention the tile with a sprinkling, which costs twice the usual material. The cost determines the quality of steel, the strength of the protective coating, the height of the wave and the brand.
What you need to know before you start
When deciding how to close a roof with a metal roof, you need to take into account some of its features: lightness, thermal conductivity and a large area. The first factor allows you to build a light rafter, and the last - a rare crate. Due to the dimensions, it is possible to make the roof of a simple shape fairly quickly and with a material waste of only 5%.A complex form will increase waste to 35%.
You also need to know how to mount metal roofing to make proper ventilation. This factor is especially important for the roof, inside which condensation occurs, which in time can cause destruction of the structure. To prevent this, it is recommended to use anti-condensation membranes.
Important! Antikondensatsionnye membranes are one-sided, so they are laid with a rough surface to the heater.
All layers of the roof are arranged in order of increasing their ability to skip the steam: the first thing is the vapor barrier, then the insulation and the air layer 30 mm thick, the waterproofing membrane and another layer of the air layer. After this, the tile is directly attached.
Stages of work
Now we will proceed to how to join metal roofing and make a roof. In this process, as in any other, there is a sequence of actions:
- After the rafters are installed, it is necessary to check the entire structure, as deviations from the project may occur.
- The main size and length of the ramp are calculated taking into account the eaves tile from the eaves to 40 millimeters. If the length of the ramp is more than 7 meters, then the sheets must be broken down into several parts and stacked with a lap of 150 millimeters.
- Natural ventilation is installed with the expectation that the air circulates freely between the cornice and the ridge.
- Coils of waterproofing are stacked;
- Work is underway to arrange heat and sound insulation indoors.
- The crate is laid;
- On the joints to the crate, a lower valley bottom is attached. Next, sheets of metal tiles are laid, and the upper end of the valley is mounted on the joint.
- For internal joints with chimneys, the inner apron is made. On top of the sheets of tiles. The question arises: how to properly screw metal? This is done by screws that cut into rafters or crates.
Important! Moving on sheets is only necessary in soft shoes, stepping into the deflection of the wave.
- The drainage system is installed.
This completes the installation of the metal tile.