For installations where safety is of paramount importance, the fire-rated square drop-down door from Manthorpe is a strong solution. Crafted in powder-coated mild steel, this extremely robust fire-rated loft door is finished with a lightly textured surface that's both easy to clean and paint (to match any decor). Certified by Chiltern International Fire Ltd, this fire-rated square door features built-in draught seals at all four sides and secures with a latch, stopping damaging moist air from entering the loft space and creating problems for the roof structure and stored items. Each door is designed with mineral wool insulation that provides a uValue of 0.35 W/mK. Engineered to be fitted flush to the ceiling, this unobtrusive design manages to blend safety with aesthetics to provide an innovative, modern solution. Manthorpe Fire Rated Loft Door Specification Frame fitting size: 531mm x 531mmAccessible Opening size: 515mm x 430mmVisible Size: 580mm x 580mmMaterial: Zinc Electro-Galvanised Mild SteelInsulation: Mineral WoolColour: WhiteU-Value: 0.35W/(Km2)Fire Rated: 1 Hour