Plylok® - Insulation

Plylok is a high performance rigid polyisocyanurate (PIR) foam board for use in warm flat roofs under traditional bituminous waterproofing and single ply membranes.

It is faced both sides with a multi-layer coated aluminium foil with a layer of 6 mm plywood bonded for additional strength and rigidity.

Roof drainage

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.

Thermal bridging

With increasing levels of insulation it is important to ensure the continuity of insulation at the junction of elements.

- Wind uplift

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 6399 and the membrane manufacturer’s recommendations for the number of fixings and the fixing pattern.

Features and benefits:

• Manufactured to ISO 9001 Quality and ISO 14001 Environmental Management Systems.
• Manufactured using a blowing agent with zero ozone depletion potential (ODP) and low global warming potential (GWP).
• Low thermal conductivity of 0.022 W/m·K.
• No requirement for roof ventilation and condensation risk within the roof is reduced as the structure is maintained close to the internal temperature.