A water control layer (WCL), or water flow reducing layer (WFRL), is a loose laid membrane installed over inverted warm roof insulation. The performance of

For a flat roof construction – be it a cold roof, a warm roof, or a warm inverted roof – the calculation method for year-round

A blue roof is a flat roof construction – either a warm roof or an inverted warm roof – where additional elements are incorporated into

Rob Firman, Technical and Specification Manager at Polyfoam XPS highlights common misconceptions about ground floor insulation and offers guidance on specification and installation. How many

Ian Exall, National Sales Manager of Polyfoam XPS gives his view. Fundamentally, price remains the driving factor on construction projects, but priorities have shifted. The

December 2018 saw the publication of amendments to the Building Regulations in England, as part of the response to the Grenfell Tower disaster. The amendments

A revised version of BS 6229, the code of practice for ‘flat roofs with continuously supported flexible waterproofing coverings’, came into effect on 30th November

As a British Standard only (rather than an adopted European or International standard), BS 6229 concentrates on flat roof construction in the UK. It describes

Poorly specified and/or installed insulation can have a detrimental impact on ground floors. Rob Firman, Technical and Specification Manager at Polyfoam XPS explains the risks

Stuart Bell, Managing Director at Polyfoam XPS reflects on 2018 and talks of what’s in store for 2019. Throughout 2018 we continued to see sector

Rob Firman, technical and specification manager at Polyfoam XPS, addresses contractors’ queries about inverted roofs and extruded polystyrene insulation. Why is a different lambda value

Rob Firman, Technical and Specification Manager at Polyfoam XPS highlights the risks of inaccurate U-value calculations and need for a more rigorous approach during the