Air Bricks / Cavity Wall Insulation

2 Aug 2006
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United Kingdom
My house must be the draftiest in England. We can't have Cavity Wall insulation as apparently the cavities are not deep enough - anyone ever heard of this?

Anyway, we have airbricks on the walls upstairs - one in the bathroom and two in the toilet (at foot and high level). There are also airbricks on the outside of the wall that match up - to allow air to pass outside I guess.

The previous owner has placed a thin plywood cover over the internal airbricks - to prevent drafts I suspect - but they let a hell of a lot of cold air in. Could I remove these air bricks and brick up the gaps, but leave the external air bricks on the outside wall alone?

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The high level vents are there to ventilate the room (bedrooms mostly) and reduce condensation. They can be removed if you ventilate the room by opening windows regularly or you will find if the room is used that the walls will get damp during the winter and may get mouldy..

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