Old 2bed maisonette from the 40s or 50s with open airbricks in lounge and both bedrooms makes the house freezing as all of the warmth from the radiators escape out. Is it safe to block up airbricks or do they still serve a purpose? How can it be done with least mess as the rooms have been recently painted?
Calvin - N8
Asked: March 01 2018
Yes. They were installed for ventilation for the old boiler system. Now you have a modern gas boiler they are no longer required.
March 08 2018
Don't seal up airvents. You can insulate the floor though
March 08 2018
Below dpc level no they ventilate the floor void to stop the timbers from rotting
March 08 2018
Only solution is to take up floor lay damp proof membrain with type1 stone then concrete
March 09 2018
You must not seal them up, they are there to stop the floor rotting
March 08 2018
You can put a hit & miss vent inside, but air vents sill serve a purpose
March 08 2018
Hi No they need to be there or mould and damp will start You can buy cover vents that have screen so only let in very minor air But air flow is vital
March 08 2018
No the wooden floor needs to breath so it doesn't rot
J R ARMSTRONG BUILDING SERVICES
March 08 2018
No
David Williams General Builder & Maintenance
March 08 2018
Above Dpc level on a cavity walls thay insulate the inner wall and below thay allow timber joists to breath which prevent damp and rot
March 08 2018
I can’t believe some of the replies I read Air Brick are there for a reason Below floor level these should never be blocked up Above DPC these give ventilation in many cases blocking these up starts black spot mould Air flow through out your property is important
One Call Building Services (Herts) Ltd
July 09 2018