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Damp Proofing

Decking and air brick

Anonymous user 09/03/2024 - 2.57 PM

Hi, I have recently layed a ground level decking that is attached to the building. I realised that the decking is couple of millimeters above the bottom of the air brick. My fears are when it starts pouring rain, splashes can easily seep into the vent and cause condesation and damp. I thought of the solution - installing cover over it and also cutting the decking board to create a slope, so that any excess water will not go through the holes of the airbrick. Would this be sufficient to prevent any possible water coming through the air brick? Many thanks for any answers.

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3 Answers

Brickwork Structures

Rating: 4.9 out of 5

Southampton

I would have left decking 20mm off the brickwork.putting spacers each side of airbricks

Answered12 August 2018

Anonymous user

Your house will be damp proofed already, the air bricks are in place to allow air circulation into joists as if they’re not able to “breathe” with fresh flow of air - through the air bricks then they will rot so as long as air brick isn’t fully cut off from air supply you’ll be ok

Answered13 August 2018

Shaw Preservations Ltd

Rating: 5 out of 5

Tadworth

I agree with Drake Brickwork. Due to the popularity of decking in recent years, as a company we have seen a rise in internal dampness on the wall corresponding with the decking. The most effective solution is to isolate the decking from the wall to prevent expensive problems in the future. Also as mentioned above it is vitally important the air bricks allow free movement of air. Blocking these up, or restricting the air flow may cause Dry rot in the future which may not be detected under the floor until severe damage is noticed resulting in a very large repair bill.

Answered15 August 2018