Roofboards - Flat Roofs

Polyurethane (PUR) and Polyisocyanurate (PIR) insulation products are the most commonly used insulation product in flat roof applications. The boards offer, as a result of their excellent thermal performance, the thinnest method of achieving the current u-value requirements of the Building Regulations / Technical Standards.

PIR/PUR insulation products offer dimensional stability and good compressive strength whilst being much lighter and easier to handle than other insulation products.

The insulation has the ability to withstand foot-traffic; this is an essential characteristic, especially when used in modern flat roofs waterproofed with single-ply membranes. Unlike PIR/PUR insulation products, some insulation materials depress under foot-traffic creating dips in the roof where water can collect (known as water-ponding). When water-ponding occurs the design life of the roof can be seriously compromised
as a result of thermal stress, alkaline formation
and mould growth.

PIR/PUR insulation products are available with a wide range of facings. The choice of facing is dependant on the application i.e. a glass reinforced perforated cellulose facing would be used for an insulation board being used in a partially bonded built-up felt application.

Benefits of PIR/PUR insulation products for Flat Roof Applications:

• Provides the best thermal performance;
• Dimensional stability;
• Good compressive strength and resistance to foot-traffic;
• Constant thermal performance for lifetime of the building;
• Resistant to moisture ingress;
• Non-fibrous and do not emit harmful emissions;
• Does not support the growth of fungi;
• Easy to handle and install

For further information please contact:
Celotex
Ecotherm
Kingspan
Quinntherm
Recticel