New Home Owners And Snagging Forum

Advice on buying a brand new home => Snagging and defects => Topic started by: DGarland on September 01, 2023, 09:57:35 pm

Title: Air bricks and DPM ??
Post by: DGarland on September 01, 2023, 09:57:35 pm

Hi not sure if this is correct or not although the Building Control guys tells me it is acceptable.
The ground level at the far end of the property is 25mm below the DPM - this is OK as it has a cavity tray fitted?
Air bricks are almost half under the ground level - again this is fine and acceptable as it provides enough ventilation.
Weep holes are pointed - just stick a screw or something in them as this is part of the properties maintenance.
I am no builder and have no idea but something does not sound quite right with it all!??

Any help greatly appreciated

Thanks
Dan

Title: Re: Air bricks and DPM ??
Post by: DGarland on September 01, 2023, 10:01:37 pm

Here is a picture showing one of the air bricks DPM being on top of the air brick.

Title: Re: Air bricks and DPM ??
Post by: AliceScott1943 on September 08, 2023, 08:59:45 am

Hello, that air brick requires re positioning above ground level.
Water can track through the air brick from the ground and into your sub floor.

Title: Re: Air bricks and DPM ??
Post by: New Home Expert on September 14, 2023, 10:58:39 am

If, and it is a big "if" there is a cavity tray, it would need to extend around the whole section of the perimeter where the dpc is not at least 150mm above ground level.
External wall DPC should be at least 150mm above finished ground level - a building regulation and warranty standard.  regulation.

No air brick should be below ground level. Normally they are 75mm above ground level to the bottom of the air brick.
In your case rainwater can and will seep under your suspended floor and could pool there.

Weep holes should be clear and open not blocked with mortar or screws!