Flat roof insulation with EUROTHANE Bi3A on concrete deck for roofs with limited drainage and partially bonded bituminous waterproofing with torch-on methods

The thermal insulation will be realised by a board of rigid Polyurethane foam (Eurothane Bi-3A) with a core volume weight of ± 30 kg/m³.The boards will be faced on both sides with bituminised glass fleece.
The boards are subject 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 = 0,027 W/mK for thickness › 60 mm and 0,028 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 thickness varies in the longitudinbal direction. The fall will be 1/60 or 1/80.
The insulation boards are bonded completely on the vapour barrier by means of hot bitumen. The boards are installed with closed joints. The waterproofing is applied directly after the installation of the insulation.
On the insulation boards a perforated bituminous layer suitable for torch-on methods is applied. The insulation boards are fully bonded to the waterproofing membrane with torch-on methods.
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.
A tapered, made by the manufacturer of the insulation boards, will be presented before the start of the works. The plan will be made up in function of:
- the dimensions of the roof;
- the place of the outlets;
- the minimum average thickness.
The following dimensions have to be used: