---These hatches are designed to be fitted with the minimum fuss and labour and provides simple, easy access through a ceiling into your loft space. ---Superior Door:Draught seals are found between both the frame and the ceiling and the door and the frame. These ensure the product meets the air leakage requirements of Part L of the building regulations and prevent moist warm air entering the loft space. The high impact, expanded polystyrene Insulation is over 50mm thick making it very effective at insulating your property. It is also CFC free. The high impact, expanded polystyrene Insulation is over 50mm thick making it very effective at insulating your property.