Aluminium roof tile UNIMETAL
PREFA

Coverings
The tiles are made of aluminium plates, 0.65 m thick, submitted to long life stove painting, available in 9 standard colours.

The dimensions of the laid surface is equal to 620x420 mm; in order to cover an area of m2, 4 tiles weighing 2.3 kg/m2 are required.
loft structure
Minimum slope for Prefa tiles:
- Up to 7 m of roof length = 12° (ca. 21%).
- From 7 m to 12 m of roof length = 14° (ca. 23%).
- Above 12 m of roof length = 16° (ca. 27%).
simple formation of the roof
Assembly on planking: the planking must be at least 32 mm thick.
It is advisable to use an asphalt paper without sandblasting as separating element.

Assembly on splines: the spline must be at least 30x50 mm. A distance of 419 mm is recommended between the main splines. The middle spline must not be omitted because it is used for supporting the snow guard.

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