What are these airbricks?

[TDack]

I’ve had an extension built with hot water underfloor heating. The builder knew that I wanted a patio that looked like a continuation of the kitchen floor but now I find that I’ve got these vents below the cill of my bifolds. Is there anything I can do about this? TIA

 

[muggles]

They aren't vents for your underfloor heating, they're cavity vents to prevent condensation in your cavity wall. Without them, you'd have a damp wall. They could possibly be moved up a bit but you'd need to seek expert advice on that

 

[^woody^]

You would fit an ACCO drain along the wall and use it for venting not draining.

BTW, is not the builder that decided to put the air bricks in.

 

[TDack]

Muggles - thanks, he did tell me they’re fir the underfloor heating but may be wrong. Strange that the side walls haven’t got them.

Woody - thanks. I’m not bothered about who decided to put them there.

 

[footprints]

Strange that the side walls haven’t got them

I expect they marry up with the existing under floor ventilation on the main building.