Roof Insulation

Insulating your flat roof can reduce your roof’s heat loss by around 90% and save you hundreds of pounds a year on your heating bill.

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How it works

Roof insulation works by helping your home to retain heat– reducing the amount of fuel you need to burn for heating and reducing your heating bills in the process.

Flat roofs should ideally be insulated from above using insulation boards. These can be attached either on top on your roof’s waterproof covering or between the timber and the weatherproof layer. It’s ideal to do if you are replacing your roof covering, and is actually a legal requirement in this situation. You can get the insulation installed on the underside of your roof instead, but this may cause condensation issues. Both types of insulation should usually be installed by a contractor.

Cost and Maintenance

A guide to roof insulation types and costs is available here.

Savings

Roof insulation can typically save the average home £180 a year on their heating bills.

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FAQs

I live in a flat, can I get cavity wall insulation installed?
It's not practical to insulate a single flat in a block. If the property has cavity walls, the whole building should be insulated.
Are there any grants available for installing solid wall insulation?
The will be a grant scheme available for solid wall insulation under the ECO (Energy Company Obligation), the complementary grant scheme to the Green Deal. Under the ECO (Carbon Saving Obligation), any UK resident will be able to get their solid wall insulation installation either partially or fully funded. It's not yet clear how people should apply for this scheme, as the both the Green Deal and ECO have just launched. It's likely we'll know more in March (2013).
How much loft insulation do I need?
To meet current Building Regulations you need 270mm of mineral wool insulation - that's 100mm between the ceiling joists and 170mm laid over the joists.
Why wasn't my house built with cavity wall insulation and the right amount of loft insulation?
Houses comply with the building regulations that apply at the time the property is built. Since the oil crisis in the early 1970s, the insulation standards in the Building Regulations have been progressively upgraded.
There is a lot of pipework in my loft space. Should I insulate the pipe work too?
Yes, it is a good idea and many insulation installers will do this for you - it usually involves fitting foam 'jackets' over the pipes.
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