Porting Air Bricks - Concrete or Substrate?

[DitchManPete]

Hi All,

looking for a bit of advice, I’m planning an extension on the rear of my property and I’ve been advised to port the existing air bricks through which seems sensible.

Due to the slant of the ground around the property if I bury the porting pipe work in the substrate (mot type 1) I’ll need to have the air bricks underground somewhat defeating the purpose. Alternatively I can bring the ports through between insulation sheets but will this pose a problem for the concrete that needs to sit on top? I could also raise the floor height to allow for a deeper substrate base but this would also lift the DPC to 325mm above ground which seems little too high.

photo of plan attached.

thanks in advance

 

[freddiemercurystwin]

Just use telescopic air vents that exit above ground level.

 

[DitchManPete]

Yes, that’s a good idea. Never heard of these before but that’s a perfect solution. Thanks Freddiemercurystwin.