Gorter roof hatches are the only ones in the roof hatch category with a proven high insulating value. EuroSolid investigated the thermal performance according to EN ISO 10077-2 and is officially stating that Gorter RHT roof hatches have an insulating value of Uw ≤ 0,319 W/(m².K)

The good insulating properties are obtained by combining a unique design with the right materials. The roof hatch features a patented (Patent no. 2519072) fully thermally insulated construction and a double sealing between cover and curb. The special design makes sure that during severe winter conditions, or if used in very cold regions, no icing or condensation will occur on the inside of the roof hatch.