Glidevale AH4 Part L loft hatches are push-up opening manufactured from injection-moulded polypropylene under BS EN ISO 9001 to meet the demands for the requirements of loft hatches as outlined in Building Regulations Approved Documents L and C. By meeting these requirements it’s certified that Glidevale AH4 push-up loft hatches offer high performance.Glidevale loft hatches offer a full loft hatch system which seals to the ceiling. The thermally insulated hatch continues the loft insulation or ceiling insulation to reduce heat loss. Seals also works towards reducing the risk of condensation as they reduce water vapour migration. The infill of insulation in the loft hatch offers 0.35 W/m2K but options to enhance the insulation to meet stricter requirements can be arranged by contacting us on 01752 692 206.Twin latches and an anti-wind uplift mechanism protect the hatch itself as well as the contents of the loft space whether the hatch is for domestic or commercial buildings. For tenanted properties however, there’s an option of two lockable security bolts to restrict access. These can be requested by calling our insulation experts on 01752 692 206. Glidevale AH4 Part L Push Up Loft Hatch Specification Accessible Clearance Opening: 680mm x 520mmTrimmed Opening Size: 717mm x 555mmOperation: Push-Up