Strange circular patch on wall

spr0ut · Post by **spr0ut** » Fri Nov 08, 2024 10:24 pm

I noticed today (behind a piano music stand - so we'd not noticed it before) a round patch in the wall. It looks like a damp patch but doesn't feel damp. I looked at the outside of the exterior wall and can't see anything amiss.

It doesn't feel damp, like I say, but the paint is discoloured and very slightly flaky.

The wall was built 4 years ago and there's no other signs anywhere else.

Any ideas what it could be? It's about 1m from the floor.

Neelix · Post by **Neelix** » Sat Nov 09, 2024 5:02 pm

Interesting. What is on the other side of the wall ? Photos would help that show the wall and the area above it

spr0ut · Post by **spr0ut** » Sat Nov 09, 2024 7:30 pm

Neelix wrote: ↑Sat Nov 09, 2024 5:02 pm Interesting. What is on the other side of the wall ? Photos would help that show the wall and the area above it

I'll take some photos tomorrow when it's light, but it's an external wall that often has a wheelie bin near it but doesn't at the moment.

There's a narrow passage and the the fence to next door.

spr0ut · Post by **spr0ut** » Mon Nov 11, 2024 1:35 pm

Neelix wrote: ↑Sat Nov 09, 2024 5:02 pm Interesting. What is on the other side of the wall ? Photos would help that show the wall and the area above it

This is the external wall. I've marked roughly where the patch is on the inside

dewaltdisney · Post by **dewaltdisney** » Mon Nov 11, 2024 1:59 pm

There is no evidence of an apparent damp patch externally. Check the guttering to ensure it is not blocked and flows freely as a blockage might cause spillover that has found its way to the internal wall where there might be a wall tie or a bridge formed to cause the patch. (This is all highly speculative) Are you sure it a damp patch and not the result of a spill from inside? Is it still damp or just a mark?

DWD

spr0ut · Post by **spr0ut** » Mon Nov 11, 2024 2:46 pm

dewaltdisney wrote: ↑Mon Nov 11, 2024 1:59 pm There is no evidence of an apparent damp patch externally. Check the guttering to ensure it is not blocked and flows freely as a blockage might cause spillover that has found its way to the internal wall where there might be a wall tie or a bridge formed to cause the patch. (This is all highly speculative) Are you sure it a damp patch and not the result of a spill from inside? Is it still damp or just a mark?

DWD

Thanks - I'll try that. It doesn't really feel damp on the inside so could well be a mark from something, but we're just perplexed as to what it could have been from.

dewaltdisney · Post by **dewaltdisney** » Mon Nov 11, 2024 3:15 pm

I think I would initially spray it with this https://www.screwfix.com/p/ronseal-400m ... aint/82093 and leave it a while to see if anything happens.

DWD