A water flow reducing layer (WFRL), is a loose laid membrane installed over inverted warm roof insulation. The performance of a WFRL is independently tested, and the result incorporated into the Agrément certificates of inverted roof solution providers. It is not a waterproof layer, but acts as a barrier to severely reduce the volume 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 condensation risk set out in BS EN ISO 13788, known as the Glaser method, is almost always sufficient. As long as the roof accords with good practice then a more […]
A blue roof is a flat roof construction – either a warm roof or an inverted warm roof – where additional elements are incorporated into the build-up to provide temporary control of the flow of rainwater during heavy rain. The aim is to provide a sustainable urban drainage solution (SUDS) on sites where other solutions […]
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 types of rigid insulation can you can name off the top of your head? And no, this isn’t an attempt to shame anybody for being unfamiliar with insulation, and there […]
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 focus is no longer on specifying or purchasing the cheapest products. The priority for most of our customers is value for money. They want affordable products, but which can still […]
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 came into effect in January 2019. Which areas of the Building Regulations have been changed? Part B of the Building Regulations, supported by the guidance published in the two volumes […]
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 2018. As part of the wide-ranging update, the standard’s guidance about inverted roof construction was amended. For more information about what BS 6229 covers generally, we have written a separate […]
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 best practice in the design, construction and maintenance of cold, warm and inverted flat roofs with a fully supported, flexible waterproofing layer. Like any British Standard code of practice, the […]
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 and offers advice on what products to choose. If you’re a flooring contractor, how far would you go to demonstrate that you have correctly constructed a floor? Would you open […]
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 growth – although the bad weather at the beginning of the year stalled some roofing projects, the momentum soon picked up and we saw positive results overall. The insulation market […]
