Rigid PIR insulation for warm flat roofs under torch-on waterproofing systems.
Powerdeck® U is a high performance rigid polyisocyanurate (PIR) foam board for use in warm flat roofs under bituminous torch-on waterproofing systems. It is faced with a bitumen glass fleece on both sides.
J41/10 Built-up reinforced bitumen membrane warm deck roof covering
J41/420 Rigid urethane foam warm deck roof insulation
|Standard product features|
1200 x 600 mm.
When tested to ENV 1187 Test 4, it achieves a Broof (t4) rating on a plywood deck and with an IKO SBS Gold Seal cap sheet. For other specifications, contact the manufacturer of the waterproofing.
Exceeds 150 kPa at yield, and suitable for loads associated with maintenance traffic. For heavier traffic, extra precautions should be taken (consult the waterproofing manufacturer for appropriate details). Care must be taken to avoid damage to boards by impact or concentrated loads during installation.
Other sizes available on request.
To ensure adequate drainage the roof should have a minimum finished fall of 1:80. This may mean designing for twice the minimum finished fall to account for building inaccuracies, roof deflection and building settlement. Powerdeck® U boards are also available for tapered insulation schemes.
With increasing levels of insulation it is important to ensure the continuity of insulation at the junction of elements.
The wind uplift force exerted on the roof will vary according to geographical location, site location and building height. Reference should be made to BS 6229 for adequate bonding of the vapour control layer to the deck. Calculations relating to the bonding of the insulation and any supplementary fixings should be made with reference to BS 6399.