Roof trader stocks and supplies Kingspan, Celotex, Ecotherm, Balytherm and Aisladeck rigid insulation and supplies many other roof insulation types for the use in pitched roofing, this also includes Web Dynamics Thinsulex multi-foil insulation which used in conjuction with rigid board insulations can help achieve your required U-Value. For our flat roof insulation we stock Aisladeck in 40mm, 50mm, and 100mm.