The value of VIP insulation Boards Oh Dear, here we go again, starting with a correction! Last month we talked about insulating balconies, and one very important word was missing from the statement “Of course, balconies over heated space always need to be insulated...

Insulating external balconies Firstly, Dear Reader, an apology. The thick book has had to be brought into use this last month due to an authoring error.  As correctly pointed out, all WFRL’s are not made equal, they are in fact made out of different materials from...

What is the importance of a WFRL? If you haven’t been involved with inverted roofing before, the acronym ‘WFRL’ may be a new one for your collection – there are lots of them in construction! If you have been involved in inverted roofing the Water Flow Reducing Layer...

High performance XPS For over 30 years the design of flat roof systems in new construction has been driven by the availability of low Lambda value, high thermal performance Polyurethane (PUR) and later Polyisocyanurate (PIR) insulation boards. The reason is simple;...