Damp

Sammysmall · 22 Feb 2017

We bought a house in October that had a lot of damp on one wall. After speaking to some experts they said the damp was caused from loose pointing in the stone work, (house 150 years old). They Patched repaired the loose pointing and sprayed the stonework with belzona. We had it re-plastered in the main areas. This seemed to stop the problem. Three months on and went up to the house last night and found 3 areas on the wall that were absolutely soaking to touch (the bits we didn’t get re-plastered (Were going to paper that section). The new plastered areas were absolutely fine.

It was raining last night but could this be condensation, and simply the old plaster attracting the water? The heating is currently off and no flooring is down in the room. I also noticed when I went to the house yesterday the windows were wet on the inside.

JohnD · 22 Feb 2017

are the gutters spilling water down the wall?

Sammysmall · 22 Feb 2017

Not that I can see, the damp is taking place downstairs, with no sign upstairs at all. The damp is located in a patch on the bottom of the wall near the door that rises to about 1 meter, and at the top of the wall and onto the ceiling about 3 meters from the door

Sammysmall · 22 Feb 2017

Don't know if this helps at all, the green is the previous damp and the red is the areas, that felt wet.

Bosswhite · 23 Feb 2017

A lot of it could be condensation if the property hasnt been aired for three months.
was there any type of heating during that period. i.e. Heating on " Tick over"

foxhole · 23 Feb 2017

If the gutter or downpipes leak water it is likely to appear at the base of the wall.
Brickwork is porous, you have that above the wall treated with Belzona which means rain will run down the brickwork an get trapped behind, only to find it's only way out, into the house.

Sammysmall · 24 Feb 2017

Thank you for the replies, after doing some more investigation, the render halfway up sits around 2cm off the brick work the lip of the render is straight and has no run off, having prodded that lip, I found it to be spongy in places, in the same areas as where the damp is coming in on the inside. Should the lip of the render ontop be at an angle so the water will run off and not just sit on top?

The house has only had the heating off for a couple of weeks, whilst the bathroom fitters have been in

drpepe · 24 Feb 2017

What;s the humidity like in the house?

vinn · 25 Feb 2017

OP,

Why not post pics of the outside and the inside of that room - I assume that its one room you are talking about?
External pics should show the ground level and the roof line.
There appears to be a chimney breast in the corner of the room - is there?

Render or pointing for inside or outside should be a sand & lime mix.
Gypsum plaster should not be used where any kind of damp presents.
Is that masonry paint on the render or some other kind of paint?
Is the wall a cavity wall or a solid wall?
Is it brick or stone?

What did the mortgage surveyor have to say about damp conditions?

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