Kingspan Thermaroof TR27 PIR Flat Roof Insulation Board is a high-performance solution designed for flat roofing applications, offering superior thermal efficiency and durability. Each pack includes two rigid insulation boards, each measuring 1200 x 1200 x 150mm, suitable for new builds or refurbishment projects. Manufactured with a fibre-free polyisocyanurate (PIR) core, this Kingspan roof insulation board delivers excellent compressive strength and moisture resistance, making it ideal for use under mechanically fixed single-ply waterproofing membranes. Easy to handle and install, the Thermaroof TR27 helps improve building energy efficiency while meeting current building regulations.