White Loft Trap Push Up Door and Frame Timloc 1168 Size: 562 x 662mm. Easy to install push up loft access door. Fully draught sealed & independently air leakage tested by BRE. Required Joist Opening: 562 x 662mm. Overall Dimensions: 670 x 770mm. Insulation is CFC free expanded polystyrene foam. Part L compliant to a rating of 0.82 W/m2k. Insulated area on the back of the door is fully maximised. Please note: Listing is for loft hatch only, the loft ladder is NOT included. Other loft hatches available in our shop. Technical Considerations: Timloc loft access doors comply with the most recent Building Regulations; ‘THE BUILDING REGULATIONS ‘Conservation of fuel and power’ APPROVED DOCUMENT L1A & L2A (2013 Edition). The Timloc loft access door demonstrates full compliance with the Building Regulation Part L1A & L2A while fully complying with BS5250:2011 the Code of Practice for control of condensation in buildings. Timloc loft access doors contain polystyrene insulation with a Thermal Conductivity of 0.038W/mK. For this reason, a correction U value of 0.004W/m2k should be calculated to the proposed U value figures for a ceiling. With reference to insulation, the products in this range do not use, contain, or produce Urea Formaldehyde, CFCs or indeed any of the so-called soft CFCs, i.e. HCFCs & HFAs. They have an ozone depletion potential of zero and Global Warming Potential of less than 5.