cavity wall air bricks

4 Mar 2008
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United Kingdom
Hello all,
I'm working my way around our dormer bungalow, sorting out each room in turn, we want cavity wall insulation and I'm sleeving the air bricks that are below the suspended wooden floor,as I'm under the floor anyway sorting out plumbing and things, it makes sense for me to do it.
My question is about the air vents we have in two north facing bedrooms on the ground floor.They are just below ceiling level. I propose to fit double glazing with ventilation options on the opening windows. Can I block off the high level vents, or must I keep them? They do let in a lot of traffic noise.
There are no en-suite or vanity units in these rooms, hence no steam problems.
Any advice is very welcome. Cheers
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