Could just cry

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Advice needed. Basically I have an old stone wall house. I have terrible trouble with condensation forming in bedroom. Tries leaving window open, dehumidifier, air brick and all the rest but to no avail. Decorated room 6 months ago. Great till last month - paint has now started blowing off 2 external walls. Walls are running with condensation. What on earth can I do - this room must have been decorated about 6 times in as many years. Whatever I do just doesnt work. Spent a fortune on Zinsser paint last time - that didnt work. This is def condensation and not damp. Please help before I take a sledgehammer to the bloody wall. It is costing me a fortune.
 
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You absolutely sure it's not caused by damp? Seems extreme. Have you had someone have a look outside at the bricks, render, the guttering, even your windows?
 
Some pictures would help. would it be practical to install insulated plaster. The condensation is caused by the warm heated air hitting the cold stone wall.
 
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Raising the surface temperature of the walls is key, if its condensation.

Probably means insulating external walls with PIR board insulation and then plasterboard -its probably the only permanent solution and will improve thermal efficiency as well.
 
The walls must be really cold surely? Insulate the walls with kingspan boards, seal up everything with insulation tape, plasterboard, skim. Will be disruptive, but you'll save a fortune in Zinsser paint and it will be a much nicer room to live in. I am in the process of insulated solid brick walls.

Put good extractor fans in kitchen and bathrooms too, and use them!
 
Thanks for all replies
Yes positive its not damp. We have the rendering, old chimney, guttering etc checked (one of the first things we did after it started blowing off second time). We have double glazed windows. It is only the 2 outside walls it is happening to. As i say leave window open as much as possible. We can leave them open all night as we live on an extremely busy main road and the noise would be too much to bear :(
The walls are freezing to the touch infact whole room is cold. We have a large double radiator in bedroom too.
I thought off insulating walls - know it would be expensive but ...............
How much roughly room would we lose (in other words what thickness are the boards?
Going down to buy dehumidifier soon (bigger than the one we already have - hopefully will help for a quick fix until I can sort somethings out!!!
 
The walls must be really cold surely? Insulate the walls with kingspan boards, seal up everything with insulation tape, plasterboard, skim. Will be disruptive, but you'll save a fortune in Zinsser paint and it will be a much nicer room to live in. I am in the process of insulated solid brick walls.

Put good extractor fans in kitchen and bathrooms too, and use them!


How are these put up? I take it they go in between external walls and plasterboard? alos any ideas what thickness would be best to solve my problem? Many thanks
 
How are these put up? I take it they go in between external walls and plasterboard? alos any ideas what thickness would be best to solve my problem? Many thanks

The simplest is a continuous layer of celetex tight against the wall, bare min 25mm ideally 50mm all over wall, tape all the joints with foil tape. screw on 50 x 25mm battens flat. Then foil backed plasterboard.

Alternatively insulated plasterboard is a possibility -I dont know how well that works though
 
i use 50mm kingspan fixed on with Everbuild Pink grip dry fix foam, then with plasterboard fixed with same foam. All joins on insulated board sealed with insulation tape to help stop moisture getting through.
You can also mechanically fix (some say to do this in case of fire ... but I don't bother - if a fire is so hot they melt, then the room will need redoing anyway! - makes sense in corridors in flats etc for access).

You can use any thickness board, the thicker, the warmer. But some people say that if you put too much insulation on internal walls, the stone walls get too cold and you will get problems with more damp / moisture in the walls - the idea is that it is not perfect, some heat still gets through as old walls "designed" to breath etc.

Here's the pics, was a full refurb. Removal of chimney, insulating under floors, rewiring electrics etc. First time doing something like this for me (my background is office work!).

https://photos.app.goo.gl/tSGFt3HD2CWY7sGa9
 
Then that suggests a damp problem and not condensation.

We have had people on checking all walls plastering etc and they say all is fine. They thinks its because our walls are so thick about 2ft (really old house) its just cold. Its upstairs room and it really only happens where there are items in front of wall cupboard etc. They have to go against these walls - I know its because there isnt enough air getting to those parts. Thanks for your input though :)
 
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