ducting and air bricks for Bathroom exhaust

[Lk1980]

Hi,
I have a new exhaust fan installed in the bathroomand the ducting with plastic 100mm pipe stops where the airbricks are present at the moment. The electrician advises that there is no need for the airbricks to be chased out as the holes in the bricks are big enough.

Can anyone please advise if it is of for the air bricks to stay or to be removed and add a grill outside.

I have a Xpelair CV4S fan which stays on all the time to ensure there is very little humidity.

 

[Nige F]

I would say that terracotta airbrick holes aren't big enough - cut out and replace with plastic ones

 

[Lk1980]

I would say that terracotta airbrick holes aren't big enough - cut out and replace with plastic ones

Hi Nige, thanks for your reply. The holes are quite big as compared to other small holes that my neighbours bricks has got.

If I do not get that air bricks out, is there a possibility of damp between the cavity and the brick wall?

 

[Nige F]

I would say you'll be OK . If you could put a large bead of silicone where the pipe will sit against the airbrick then the vent will seal well against the brick. I would use an offcut of pipe so that you can push it against the airbrick and mark the inside by reaching through with a pencil. Then you will have the exact place to position the silicone bead. Hope this helps.

 

[Lk1980]

I would say you'll be OK . If you could put a large bead of silicone where the pipe will sit against the airbrick then the vent will seal well against the brick. I would use an offcut of pipe so that you can push it against the airbrick and mark the inside by reaching through with a pencil. Then you will have the exact place to position the silicone bead. Hope this helps.

Thank you Nige. I think i ll do that. But of for any reason I can't seal, do you think damp can occur? Also there is a large window on the side which is open to all the time to ensure the air flow. The fan is a backup option to avoid the paint flaking on the top corner of the ceiling and is always on.

 

[Nige F]

I don't think damp will occur across the cavity to inside