VM ZINC® is installed on the roof boarding.
A 40 mm continuous air gap must be left clear beneath the roof boarding, on all the roof pitches.
Continuous ventilation openings are made at the top and bottom.
In order to keep the integrity of the roof, it is recommended to install a breather membrane on the cold side of the insulation and a vapour control layer adapted to the internal humidity load of the building, on the warm side of the insulation.