Saturday, March 22, 2008
A Guide to Cavity Wall Insulation
I wasn't sure whether to include this video as I think it's irritatingly patronising. What do you think?
Annoying videos aside, cavity wall insulation can make a huge impact on your home heating bill and on your carbon footprint. About half the houses in Britain have cavity walls, although if your house is under 25-30 years old it probably had the cavity walls insulated at the same time it was built.
If you live Britain you can contact the Energy Saving Trust who will put you in touch with a local contractor. They will check whether your house already has cavity wall insulation by drilling a small hole in your exterior wall to have a look. They will fill the hole up again when they're done so there is nothing to worry about, and they will carry out the check free of charge. If you don't have cavity wall insulation it's great news in a way, because you can save up to 15% of your home heating bill (abut £90 per year) by getting insulation installed. That's about the same as you can save by having your loft fully insulated - almost as much heat leaves your house through the walls as through the roof.
It costs about £500 to get cavity wall insulation installed. It's a quick and clean procedure. And you should recoup the cost in lower heating bills within about 5 years. There may be grants available, so ask the Energy Saving Trust about grants when you speak to them.
We've already got cavity wall insulation. It was here when we bought the house. But if we didn't I would definitely get it done. It's one of the most important things you can do to save energy, save carbon (about 3/4 of a tonne per year), and save yourself loads of money.
If you get a contractor to come and check whether you have cavity wall insulation, you can tick "I've done one thing on the list!" in the poll in the right-hand-sidebar. If you need to install insulation and you do it, you can tick it again.