Damp question near Boiler

[Mattt555]

Hi,
So this problem has been there since we moved in, a few years ago, and one of things I've just not got around to.

It's Damp on three walls at the bottom in the lounge, these are internal walls, brick built.
it's worst either side of the chimney which has a back boiler fitted in the lounge. but there is also some on the other side of the door, i'll take some pictures shortly

The damp is not mouldy at all, it just looks wet and feels a bit moist to the touch.
Not really sure if anything is actually leaking as its not really changed or very very slow if it is.

Just looking for some advice on what the cause is likely to be, is it more likely to pipes or the boiler or coming from somewhere else. and what would you do about it.

 

[Mattt555]

this bit further away from the boiler, and a photo to explain where they are in the room.

 

[hi1]

Weird. I'd have gone with the leaking back boiler or possibly water ingress down the chimney apart from the fact that the damp skips quite a way from the chimney across a doorway and then up the wall. You have laminate flooring down can a piece be taken up to see if its damp underneath and travelling across under. Do you have solid floors under the laminate? Cellar? How old is the property? Whats in the cupboard to the right of fireplace?

 

[Mattt555]

Thanks, the floor is concrete under the laminate, annoyingly it runs across. So I'm going to have to take up the whole floor I think.

The house is a 50s semi pretty solid.
The cupboard is empty apart from a Hoover, except it had the water and gas pipes on the left side. There is no damp patch on the wall in the left of the lounge door though.

 

[hi1]

If its tracking under the floor then its the back boiler. I wouldn't bother taking up the flooring it will dry out once the water stops getting under it. The wall is sat in water and acting as a wick drawing it up. I'm not an expert but presumably this back boiler has to have a header tank system, if the boiler is OFF I'd tie up the ballcock of the header tank and see if the level drops.

 

[stardanny]

Do you have downstair radiators with pipe from floor?

Where is the main stopcock?

When was the boiler last serviced? You need gas registered engineer to remove fire front and check out boiler.

Daniel.