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Hinged Plastic Airtight Loft Hatch (Insulated Loft Doors)

Insulated hinged loft access hatch and frame sets to provide simple, easy access through ceilings into the loft space.

Loft doors with zero air leakage at Part L's 50 Pa - under positive test conditions.

Featuring an integral anti-draught, vapour and condensation migration seal with a choice of insulation U value performances of 0.82, 0.35 and 0.25W/m2k.

Simple twist operated catch release with secure key lock option.

Tested by BRE (Building Research Establishment) as meeting Building Regulation Part L’s reasonable air leakage requirements of <10m3/(h.m2) at a pressure differential of 50Pa and BS5250:2011

  • *air permeability measured at 50Pa as 0.00m3(h.m2) under positive pressure test conditions.

Designed to fit between 38mm thick trussed rafters or ceiling joists spaced 600mm centres which provide a clear joist opening width of 562mm.

Easy to use, from floor level, and cost effective dedicated loft door operating poles available for this range - to be ordered separately (not suitable for key lock variants).

Clean simple design that will blend well with most surrounding decors; with slightly textured finish that can be painted if required.

Concealed downward opening hinge mechanism allows use with telescopic loft ladder systems.

Free Loft Hatch/Loft Door BIM and Revit components available.

View product range & add to quote

Features & Benefits

  • Insulated door panel
  • Standard, 0.25* and 0.35* U value insulation performance options (*to help meet the requirements the Robust Details)
  • Integral anti-draught and condensation migration seal
  • Purpose made product saves time and money compared with traditional joiner-made timber loft access doors
  • Meets the requirements of Part L’s air leakage requirements and BS5250:2011
  • Air permeability measured at 50Pa as 0.00m3(h.m2) under positive pressure test conditions
  • Excellent aesthetic appearance
  • Factory finished and ready to fit straight from the box
  • Can be painted if required
  • Easy twist operated ‘anti uplift’ catch or secure key lock alternative

Applications

  • Residential new build installations
  • Product replacement projects

Technical Information

  • Ozone depletion potential (ODP) of zero
  • Global warming potential (GWP) of less than 5
  • Contains polystyrene insulation with a thermal conductivity of 0.038W/mk, therefore a correction U value of 0.004W/m2k should be calculated to the proposed U value figures for a ceiling
  • The insulation materials featured in this range do not use, contain or produce Urea Formaldehyde, CFC’s or any of the soft CFC’s, ie HCFC’s
  • Meets the air leakage requirements of Building Regulation Approved Documents L1A & L2A (20130 editions) ‘Conservation of fuel and power’ of <10m3/(h.m2) at a pressure differential of 50Pa
  • Complies with BS5250 2011 the Code of Practice for control of condensation in buildings

Installation Advice

  • Designed to fit between 38mm thick trussed rafters or ceiling joists spaced 600mm centres to provide a clear joist opening width of 562mm
  • If the roof design does not provide this joist opening width, a suitable opening must be formed
  • Trimmers must be installed across the ends of a frame; these should be spaced to give a clear opening length of 662mm
  • The frame fixes ten screws (supplied) - three through each side and two through each end
  • Do not over tighten the fixing screws as this could distort the screws
  • Fit the loft access door after the ceiling has been plaster boarded and skimmed
  • The frame must be a good fit into the trimmed opening, never force it into an opening that is too small, if the opening is too large use packers to ensure a good fit

Quality, Regulations and Standards

  • Satisfies NHBC and Robust Detail requirements
  • Manufactured to BS EN ISO 9001 (quality) and BS EN ISO 14001 (enviromental)
  • Complies with Building Regulation document L1A & L2A (2013 edition)
  • Meets all relevant British Standards inc. BS5250:2011
  • Fully complies with NHBC standards for having a minimum access opening of 520mm
  • 0.25 and 0.35 U value insulation performance options to help meet the requirments the Robust Details

Material and Colour

  • One piece injection moulding in polypropylene frame
  • One piece injection moulding in polypropylene door/hatch
  • Insulation material is CFC free expanded polystyrene foam
  • Ozone depletion potential (ODP) of zero
  • Global warming potential (GWP) of less than 5
  • Hatch and frame available in white (RAL 9010 - slightly textured to aid painting if required)

Care and Maintenance

  • Clean using a soft cloth with mild detergent
  • Spare keys are available upon request for key lock product only
  • nbs plus
  • riba

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