Insulation for flat roofs waterproofed using mechanically fastened single-ply waterproofing, this 25mm thick Kingspan Thermaroof TR26. The rigid thermoset insulation core is faced on both sides with a low emissivity composite foil facing that is used for flat roof insulation and is fully compatible with most mechanically fixed single-ply waterproofing systems as well as most green roof systems. Ideal for new construction and renovation projects. Insulation is made utilising a blowing agent that has zero ODP and a low GWP. The product is simple to handle and install.