Important elements in the arrangement of a metal tile roof are the cornice strip for the metal tile, as well as the end strip. Despite the fact that these elements occupy a small (compared to the roof slopes) area, they perform quite important functions, maintaining the integrity of the roof and protecting it from damage.
Both end and wind slats are produced using the same technology as the main sheets of metal tiles, designed to cover roof slopes.
They are based on a metal profile made of galvanized and passivated steel with a thickness of 0.4 - 0.5 mm, while they are covered with the same polymers as the rest of the metal tile: the end and wind bar can be produced with both plastisol and polyester coatings, and for composite metal tiles, the end strips are covered with basalt chips.
In this article, we will analyze why these elements are needed, as well as present the technology for their installation.
Appointment of eaves and end strips
The cornice strip is a longitudinal element of the metal roofing, the main task of which is to protect the frontal board of the eaves from getting wet when in contact with atmospheric precipitation and, as a result, from the penetration of moisture into the roof space.
The end plank for a metal tile has a design similar to the design of the eaves plank, however, unlike it, it is attached not at the bottom of the slope, but at the side ends of the roof.
Overlapping the end, the end plate not only protects the crate from moisture, but also prevents damage to the roof due to wind loads.
It is this function that gave the end plank its more common name, the metal tile wind plank.
Installation of the cornice strip
Installation of the cornice strip for metal roofing is carried out according to the following scheme:
- The first stage is the installation of the front board. We fasten the frontal board to the ends of the rafters with the help of galvanized nails.
Note! In some cases, an alternative to the frontal board can be a cornice board, which is attached to special grooves in the rafters.It is also possible to simultaneously install both frontal and cornice boards in order to strengthen this roof assembly.
- Then - execute roof eaves liningusing grooved boards or corrugated board. In any case, for filing the cornice on the wall of the building, we attach a support beam, from which it will be attached roof eaves lining.
- Immediately before installing the cornice strip, we mount hooks for roof drain. We attach the hooks either to the cornice board, or (if we did not install the board) directly to the rafters. The legs of the hooks must be sunk into the wood.
- Next - install the cornice bar itself. It is installed before we begin to mount the metal tile. We lay the plank in tension over the hooks for the gutter (to avoid rattling in the wind) and fasten it with self-tapping screws to the frontal and cornice boards. The fastening step of the cornice strip is 300-350mm.
- When building a cornice strip, the overlap is no more than 100 mm.
End plate installation
After a metal tile is installed on the roof slopes, the end plank should cover the ends of the roof, protecting them from moisture and wind. The end plate is mounted as follows:
- We set the end bar above the level of the crate, exactly at the height of one wave. The end plank is laid in such a way that the corner of the end of the roof is completely blocked - if the crate was mounted evenly, then you can do it without difficulty.
- We fix the end plate with self-tapping screws from above and from the side, while the upper self-tapping screw must additionally fix the bar to the metal tile.
- The overlap of the end plank during its extension is up to 50 mm.
- The joint of the end plate and the metal tile can be additionally sealed by laying a sealant in it.
If during the arrangement of the roof the cornice and end plank were correctly installed, the metal tile will serve you for a very long time. And this is due to the fact that these small details reliably protect the roof from rain and wind!
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