Flat roof insulation EUROTHANE Bi3 on steel deck for roofs fully bonded bituminous waterproofing with bituminous cold glue

The thermal insulation will be realised by means of 100% CFC-free boards of rigid Polyurethane foam (Eurothane Bi3) with a core volume weight of ± 30 kg/m³.
The boards will be faced on both sides with bituminised glass fleece.
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 NBN-EN-ISO 9001:2000 standards.
The declared thermal conductivity coefficient λ_D = 0,027 W/mK for thickness › 60 mm and O,028 W/mK for thickness ≤ 60 mm.Pressure resistance with 10 % deformation: > 120 kPa (1,2 kg/ cm²).
The dimensions of the boards are 1200 mm x 600 mm.
The minimum thickness of the insulation boards will be 1/3 of the corrugation width of the steel plate. When the corrugation width is larger than 100 mm care should be taken that the insulation board edges are fully supported. The boards are installed with closed joints. The waterproofing is applied directly after the installation of the insulation. The boards are mechanically fixed to the steel deck. The amount of fastenings will be defined according to their quality, the wind load and the thickness of the steel board with a minimum of 4 fastenings per board in the central roof area and a minimum of 5 or 6 per board in the edge zone and in the corners of the roof. Fixation on the roof edge will be provided. 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 bituminous waterproofing is fully bonded on the insulation boards by means of adapted bituminous cold glue in compliance with the prescriptions of the glue manufacturer. The compatibility of the cold glue with the PUR-boards will be shown by the glue manufacturer.
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 incorporated in the Technical Approval of the insulation material are applicable. Follow the general regulations of the note 215 when the technical approvals are not available.
The following surfaces and minimual average thicknesses have to be used: