Flat roof insulation POWERDECK with A1 reaction to fire on wooden deck with mechanically fixed single ply waterproofing - not bitumenstock

The thermal insulation will be realised by a board of rigid polyisocyanurate foam (Taufoam by Recticel / Powerdeck ) with a core volume weight of ± 30 kg/m³ and an A1 reaction to fire according to RD 19/12/1997 or Euroclass D s2 d0 (product) or Euroclass B s2 d0 (end use steeldeck) according to EN 13501-1.
The boards will be faced on both sides with aluminium foil of approx. 50µ.
The boards will have been subjected to a permanent quality control conducted by an acknowledged institute and will have a technical approval. The production of the insulation boards is certified according to the ISO 9001 : 2000 standards.
The declared thermal conductivity coefficient λ_D = 0,024 W/mK.
Pressure resistance with 10 % deformation: > 150 kPa (1,5 kg/ cm²).
The dimensions of the boards are 1200 mm x 2500 mm.
Previously we place on the underground:
- a partition layer consistent of rough glass fleece or polyestermat
- an underlayer P150/16, reinforced bitumen with polyestermat, nailed on the underground
- a vapour control barrier bonded with hot bitumen or with torch-on method
The boards are mechanically fixed to the wooden deck. The amount of fastenings is minimally 6 per board. The mechanical fixations to be used will meet the demands in compliance with the UEAtc-class II and will have a minimum diameter of 4,8 mm. The waterproofing has to be applied immediately after the installation of the insulation. The single ply waterproofing will be mechanically fixed through the insulation boards into the wooden deck. The instructions of the manufacturer of the waterproofing should be followed.
The necessity of a vapour control layer will be determined by a calculation or by the Technical Information 215 "HET PLATTE DAK" (the flat roof) of the WTCB. The specific guidelines of the note 215 are applicable.
The following surfaces and thicknesses have to be used: