Summary
Free 2 to 3 working days delivery to mainland UK.
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Quick turn around and competative prices
“Quick turn around and competative prices”
- Part L Compliant
Insulated 562 x 726mm loft hatch – Part L compliant
Free 2 to 3 working days delivery to mainland UK.
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Additional Shipping Charges
- Free delivery to mainland UK*
- Fire-rated & metal panel specialists
- Bulk discounts available*
Description
Product Reference: GL250-035-EPS
The GL250-035-EPS is a drop down, insulated loft access door for energy efficient access to the roof space. Its multi-point catch mechanism keeps a draught seal around the whole opening, helping to meet the air leakage requirements of Part L of the Building Regulations and stopping moist warm air entering the roof space, where it causes condensation and heat loss.
Choose the insulation type: 110mm expanded polystyrene or 60mm polyurethane, both listed at 0.35W/m²K, the usual benchmark for an insulated loft hatch. Approved Document L sets no U-value for loft hatches. It asks for the hatch to be insulated and fitted to be as airtight as possible, so check how the hatch fits the whole ceiling’s insulation with your designer or SAP assessor. The door is white and can be used with the GLL256 and GLL257 loft ladders.
This hatch is not fire rated. Where the ceiling must resist fire, choose a fire rated loft hatch, and for an opening other than 562 x 726mm, a made to measure loft hatch. The heat loss and air leakage rules it is designed to meet are set out in Approved Document L.
Loft Hatches Specifications
| Insulated Loft Hatch Specification | |
|---|---|
| Colour: | White |
| Packing details: | Individually packed in a polythene bag and boxed |
| Box weight: | 5.40kg |
| Material: | High impact polystyrene |
| Manufacturing process: | Injection moulded |
| Draught seals: | Expanded polyurethane |
| U-Value: | 0.35 W/m²K |
Features
- Door and frame are fully draught sealed.
- Seals supported by 12 independent perimeter catches. This stops the middle of the door sagging and bowing away from the draught seal over time, which would create an air leakage path.
- Sliding door catch operated from a single point, replacing a conventional twist action lock.
- All hinge, catch and fixing geometry is located outside of the seal, so there are no holes through the door and no air leakage paths.
- Hinge detail hidden when the sliding cover is in the fully closed (locked) position.
- Hinge pivot is positioned to maximise the accessible opening.
- The hinge design makes the door fully removable in seconds, for simpler installation and better access with larger insulation options.
- Hinge blockers prevent unwanted door removal.
- Screws fix up into the timbers, for fast and simple installation and optimum pressure on the frame to ceiling seal.
- Fully insulated door panel. The back of the door is shaped to give more space for insulation, so the 110mm of expanded polystyrene covers a greater area within the structural opening, giving a U-Value of 0.35W/m²K.
- Suitable for use with loft ladders.
The catch mechanism should be operated by hand to maintain maximum control over the door as it is opened.
Environmental & Air Leakage Assessment
The expanded polystyrene insulation used on the back of the GL250-035-EPS door has a Global Warming Potential (GWP) of less than 5. The insulation is also CFC/HCFC-free with an Ozone Depletion Potential (ODP) of zero.
The effectiveness of the draught seals on the GL250 have been independently tested by the BRE in accordance with BS EN 13141-1:2004 (test report no. 283-506). The door exceeds the requirements for a “Well Sealed Ceiling” as detailed in BS 5250 with an air leakage rate below 1m³/h at a pressure differential of 2 Pa. This door also meets the Building Regulations Part L ‘reasonable limit’ for the design air permeability of buildings with a rate of less than 10m³/h.m² at 50Pa.
| Insulation Type | 60mm Polyurethane (0.35W/m²k), 110mm Expanded Polystyrene (0.35W/m²k) |
|---|
Measuring Guide
This hatch is made in one fixed size. Before you order, check that the opening in your ceiling matches the fitting size below.
Sizes (from the manufacturer’s drawing)
- Fitting size: 726mm by 553mm (min) to 562mm (max).
- Clear opening: 715mm by 545mm.
- Overall size: 856mm by 686mm.
