Bubbling Paint in downstairs toilet

alibob22

Hello. 

I have started to notice some bubbling Paint isolated to one area of my downstairs toilet. The other side of the wall is a kitchen cupboard. Is it just a bad paint job from the previous owners? It is low level and by the sink and where a towel are kept but also next to the toilet. 

Just after a bit of advice and possible fix. It is no where else in the toilet.

akira181

To me looks like some sort of damp or poor ventilation from a bathroom environment is causing the plaster to blister.  If there's no leaks (I assume that raised tiled ledge is to cover some sort of pipework) and the damp isn't bad, I'd sand it back and use some sort of stabiliser / sealant primer before repainting and see how that goes.

If it is indeed damp (not just a leaking pipe which should be fixed regardless), the proper way would be to find the source and fix it but that could be rather expensive for a relatively small patch.  The risk of just painting over is that the sealant primer could push the damp to the next closest unsealed part.

Indigo_and_Violet

We discovered a similar problem this morning. Bathroom recently renovated but paint peeling from an internal wall with none of our pipework in it. Bathroom fitters have had a look at photos and think not related to their work (I know they would say that, but we tend to agree given the location).

One suggestion is it's coming from the flat upstairs
But it seems to top out at 1m high and be worse around the skirting boards
Which suggests maybe rising damp (internal wall is load bearing and we think the bathroom was an extension).

Just wondering who the right people are to call? I feel like if we call out a damp company immediately it's in their interest to declare it damp. We offered to pay the bathroom fitters to come round and have a look but they're on another job on the other side of London. We know people locally who can recommend a good plumber/builder etc but not sure which trade to start with.

Cheers.

ryan7

Looks like not enough ventilation to me.
Had something similar in a previous property whereby the Mrs enjoys long, blistering hot, steamy showers without the window open. 
Keep the room ventilated at all times giving that area an opportunity to dry out.
I would even go as far to wipe the walls with a dry towel after shower or use Kracher window cleaner to absorb the moisture on the walls. 

alibob22

Hello I have peeled back the paint below and cut away at the boxing to the right where the cold and hot water feed is for the tap. Inside the boxing looks clean and the same marks are not there. There is a darker shade to the bottom right of the picture of the flaking paint. There are no internal pipes in that wall either