DPP 25 is a double skin system for slooped roof consisting of a structural tray as inner facing and a trapezoidal steel sheet as wheather facing, the system provides a thermal performance of Up 0.25W/m².K.
Non load-bearing tray Hacierco C 450.70 non perforated or perforated type P with a thickness according to the span
Cleats or steel spacer
Glass wool or mineral wool 70mm thick (in the bottom of the tray (λ = 0.040W/m.K maximum)
Airtight vapor barrier film
Glass wool 120 mm thick unrolled between purlins (λ = 0.040W/m.K maximum)
Glass wool 60 mm thick nipped on the purlin(λ = 0.040W/m.K maximum)