The AT metal loft hatch is the first air tight loft hatch of its kind. Insulated to meet Part L of the building regulations.
|CODE||STRUCTURAL OPENING||CLEAR OPENING ONCE INSTALLED||"U" Value||DEPTH||WEIGHT|
|AT35||560 x 640mm||520 x 538mm||0.35||60mm||4.5kg|
|AT25||560 x 640mm||520 x 538mm||0.25||100mm||4.8kg|
|AT15||560 x 640mm||520 x 538mm||0.15||100mm||5.4kg|
❑ The AT35 metal loft hatch is the first air tight loft hatch of its kind. Insulated to meet Part L of the building regulations the AT35 is airtight in both positive and negative air pressures at 50Pa. This hatch is designed specifically to meet the stringent demands new properties are subjected to ensure they are as airtight and well insulated as possible. The air permeability test is based on BS EN 1026:2000 and BS EN 12207:2000 for a ceiling use only.
❑ Fitting is a doddle, just screw fix through the pre-drilled holes in the frame into the surrounding joists. The spring loaded twist catch lock ensures a high compression seal between the door and the frame. The outer frame is also fitted with a seal to ensure air cannot easily escape from around the outer edge of the hatch.
❑ This steel loft trap protrudes just 2mm from the ceiling when fitted. You'll also notice its lovely clean lines and smooth finish (Powder-coated in white) it's the neatest loft hatch on the market. Let's face it does anybody really want a great unsightly lump of plastic protruding from their ceiling?
❑ Insulation - 65mm foam insulation bonded to the inside of the lid (AT25 and AT35) 100mm PIR (AT15)
❑ Standard: Twist lock with a tri-drive lock body (Comes with opening key - Pole also available as separate item)
❑ Optional: key lock available (Key supplied) Please note pole not suitable for use with this option
Trim out a suitable opening and fix noggins between trusses to form a clear opening of 642x562mm.
With hatch open at 90 degrees, offer the frame up to the opening pushing tightly upwards to ceiling to engage the frame seal, hold in place with speed clamps or an alternative safe & secure method. Then fix using the six 40mm long woodscrews with air-seal black rubber washers (provided). Ensure the screws are fixed in straight to gain the required air-seal and do not over tighten. Make the frame is fixed squarely, check the diagonals are identical, adjusting with the screw tension if necessary. Close the hatch and lock with the triangular drive key.
Type a value in the Inches field to convert the value to mm: