Loft Hatch AT

The AT metal loft hatch is the first air tight loft hatch of its kind. Insulated to meet Part L of the building regulations.



Further Information

  • ❑  Airtight at 600Pa air pressure (Positive and negative)
  • ❑  Easy to fit and easy to open with hinge down movement
  • ❑  Neatest loft hatch on the market, protrudes just 2mm from ceiling when fitted
  • ❑  AT35 fits a structural opening of 645 x 560mm (see The variations in Technical Specifications Tab)
  • ❑  AT35 clear opening when fitted 520 x 560mm (Meets NHBC guidelines)
  • ❑  Fabricated from steel, finished in white Powder coat (RAL 9010)
  • ❑  Made from 80% recycled steel. GWP and ODP ratings of zero
  • ❑  2 XPS insulation options giving U values of 0.35 (60mm - Blue) and 0.25 (100mm - Blue)
  • ❑  PIR Foam (100mm) insulation to give U Value of 0.15
  • ❑  Patented granted


Stock Sizes

 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



More Information

The best performing airtight loft hatch available

❑  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.

Easy to fit

❑  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.

Appearance

❑  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)

Lock options:

❑  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



Insulated Meter Box Technical Drawing


FITTING INSTRUCTIONS FOR 600mm JOIST CENTRES

AT35 DROP-DOWN LOFT HATCH

Preparation

Trim out a suitable opening and fix noggins between trusses to form a clear opening of 642x562mm.

Fitting

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.

External Wall Insulation Electric Meter Box




LENGTH CONVERTER

Type a value in the Inches field to convert the value to mm:

mm

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MADE IN THE UK




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