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Insulating a loft hatch is a simple, cost-effective DIY job that keeps the heat in and the cold out of your property. This is especially true if your loft is only insulated at joist level, rather than rafter level. Draught-proofing the loft hatch at the same time will also help ensure you gain the maximum savings on your energy bills, too and helps to insulate your home.
Furthermore, insulating a loft hatch can prevent issues with condensation in the loft space. Warm, moist air will be drawn into a loft space if it’s not insulated properly. When the hot air hits cold surfaces, such as roof timbers, it will condense. This can cause wood to rot and decay, causing damage to your roof’s structure over time. That’s why it pays to investigate how to insulate a loft.
Insulating a loft hatch: things to consider
Image credit: Future PLC/ Rachael Smith
What type of loft hatch do you have?
Loft hatches can vary in several ways, including size, material and opening mechanism. However as a guide, there are two common types of loft hatches found in a UK home:
- The hinged variety: These fold down into the living space, and could come with or without a fixed ladder. This is a common option in newer buildings due to the ease and accessibility that they offer.
- Flat hatches rest on the frame of the loft entrance and simply lift out. ‘These are very typical of older homes and are often poorly insulated,’ advises Camilla Govan at Green Building Store.
Understand loft hatch insulation costs and savings
‘Blanket insulation and loose-fill insulation can both be bought for around £5-£10 per m2. Adding in the tools to measure, cut, and adhere the insulation to the hatch, the total cost should be in the region of £15-£20,’ says Matthew Jenkins, heating and insulation expert at MyJobQuote.co.uk. ‘If you are also draught-proofing the hatch, self-adhesive foam tape can be purchased for about £15.’
How the rest of your loft space is insulated will determine how effective insulating your loft hatch will be. It’s good to get an overall picture of How much does loft insulation cost?. ‘If the roof is insulated at the rafter level, then you will see little to no benefit from insulating your loft hatch,’ says Matthew Jenkins. ‘If the loft is insulated at the ceiling joist level, then insulating your loft hatch should confer a substantial benefit.’
That being said, the potential financial savings according to Matthew Jenkins are roughly only £3.50 per year. It doesn’t save you a lot of money, but it is a quick, inexpensive and relatively easy job and will attribute some way towards energy savings in your household.
Image credit: Kinek00 / Alamy Stock Photo
Different ways to insulate a loft hatch
1. Insulate a flat loft hatch using blanket insulation
To insulate a loft hatch, cut the blanket insulation to match the same width and length of the loft hatch. The depth of the insulation should measure 270mm – in line with current government guidance. Once cut to size, simply glue to the loft-facing side of the hatch door with your choice of adhesive.
2. Insulate a flat loft hatch with loose-fill insulation
You will need to attach a container to the hatch to hold the insulation in, such as a carrier bag. This can then be filled to the required depth with the loose-fill insulation.
3. Insulate a hinged loft hatch
Existing drop-down hatches with attached ladders can be treated in the same way as option 2, but care will be needed to ensure the insulation does not interfere with the mechanism of the ladder. Foil insulation, which costs from around £10 per m2 could be a good material to use in this scenario, as only a thin layer is required to meet the same thermal efficiency compared to other insulation materials.
‘Cut the sheet to size and fix it to the topside of the hatch, with enough overhanging to ensure it lines up tightly with the insulation around it,’ advises William Bown, director at Superfoil Insulation.
Image credit: Future plc/Colin Poole
Draught proof a loft hatch
Draught-proofing your loft hatch will not prevent the loss of heat through the hatch itself like insulating a loft hatch does. It will prevent the passage of cold air from the loft space into the living space below, eliminating draughts and increasing your household’s comfort. ‘The performance of a well-insulated loft hatch is significantly undermined if it is not airtight,’ says Camilla Govan. ‘Draught-proofing must complement insulation and vice versa, and one without the other will have a negative effect on your home.’
• Flat hatches Cut the self-adhesive foam tape to size and stick it directly to the frame facing upwards (into the loft space). As the name implies, the tape should have a peel-off back and adhere directly to the surface. In this case, the hatch will rest atop the tape, creating a seal.
• A hinged hatch Cut the self-adhesive foam tape to size and apply it to the edges of the frame facing downwards (into the living space). The hatch will then press up against the tape when closed, creating a seal.
• A hinged hatch that does not rest against the frame of the loft In this case, you will need to apply the tape to both the frame and the hatch itself so that, when closed, the two strips meet and form a seal by pressing against one another.
Remember there are loft insulation grants available.
The post Insulating a loft hatch – everything you need to know appeared first on Ideal Home.
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