The Insulation Manufacturers Association (IMA) has launched a guide to the use of PIR insulation in flat roofs in England.
Created for specifiers, building owners, main contractors and roofing contractors, it offers advice on the key aspects affecting the specification of PIR insulation for flat roof applications.
The document provides guidance on how to meet the latest requirements of Approved Document B (ADB) of the Building Regulations 2010 for England in relation to PIR insulation in flat roofing applications. It looks at the thermal and strength characteristics of PIR to help designers understand how and where PIR can be used.
There is also guidance on other properties pertinent to the use of PIR in flat roofing such as fire, thermal performance and compressive strength. It covers the use of PIR in warm roof applications and also explains the terminology.
“This detailed publication brings clarity in respect of how and where PIR insulation can be used following the changes in building regulations with respect to flat roofing,” commented Simon Storer, Chief Executive of IMA. “It also addresses questions that have been raised regarding roofing classifications as well as issues around fire performance, compressive strength and thermal performance.”
The guide provides visual comparison of the thickness of different insulation types when achieving specific U-values to help specifiers and contractors appreciate potential roof thickness. It also looks at how moisture can be controlled in flat roofs when using PIR insulation.