External airbricks

Hedges1985

Hi everyone,

hoping someone can help.
Can any advise if airbricks are required above suspended floors for the cavity wall insulation? 

I live in a 1940’s bungalow with suspended floor. We have airbricks all around the property, the location of most of these sit below the floor level, which I believe is correct which allows air flow below the floor boards. I also have much larger airbricks which look they have been installed at a later date above floor level?

Areas of the bungalow which have these later airbricks do feel particularly cold, can anyone advise if they are needed? I was always under the impression airbricks weren’t required for cavity walls. 

stuart45

Air bricks were used years ago to ventilate the cavity, but were  found to cause cold spots on the walls and increase the U value of the wall to higher than a 9 inch solid wall

Hedges1985

Thank you. 

I assume blocking you the larger airbricks would be the best decision then? 

stuart45

If the air bricks were installed only to ventilate the cavity, then they could be blocked up.

TELLIT01

They were sometimes installed to provide airflow and ventilation for gas fires and back boilers, my next door neighbour had them for that reason.  If you don't have gas fire or boiler in that room you should be ok blocking them up.