Flat roof insulation POWERDECK F on wooden supporting structure with bonded single ply waterproofing systems: bitumenstock

The thermal insulation will be realised by a board of rigid Polyisocyanuratefoam (TAUFOAM by Recticel / POWERDECK F) with a core volume weight of ± 30 kg/m³ and an Euroclass E.
The boards will be faced on both sides with a mineral coated and perforated glass fleece.
The boards will have been subjected to a permanent quality control conducted by an acknowledged institute.
The production of the insulation boards is certified according to the ISO 9001 : 2000 standards.
The declared thermal conductivity coefficient λ_D = 0,026 W/mK.
Pressure resistance with 10 % deformation: > 120 kPa (1,2 kg/ cm²).
The dimensions of the boards are 1200 mm x 600 mm.
The insulation boards are:
- either fully bonded on the vapour barrier by means of hot bitumen
- or mechanically fixed in the bearing structure with a minimum of 4 screws per panel. The correct amount of fixations will be defined on the basis of the quality of the fixations and the bearing structure and the wind load.
Preceding we place on the wooden underground:
- a partition layer of glass fleece or polyestermat
- an underlayer P150/16, reinforced bitumen with polyestermat, nailed to the underground
- a vapour control layer bonded with hot bonding or torch-on method. In case of mechanically fixed insulation a vapour control barrier on synthetic base is possible which is then fastened together with the insulation boards. The above lying underlayer can then be dropped as well.
The boards are installed staggered and with closed joints. The waterproofing is applied directly after the installation of the insulation. The single ply waterproofing is fully bonded immediately after the installation of the insulation by means of a compatible cold glue and in compliance with the prescriptions given by the waterproofing 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 dimensions have to be used: