Questions tagged [damp-proof-course]

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What external options are there to prevent penetrating damp from a difference in ground levels

I have a single skin/solid brick wall garage. It has a problem of penetrating damp due to the external ground level being 2 to 3ft above the damp proof course. Outside is flat ground with a patio on ...
Mark W's user avatar
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7 votes
3 answers
2k views

What is this small metal cover on my exterior wall?

I have a mid-60s house in the UK, at the front of the property at spanning DPC level there's a small metal cover (approx. dimensions are 1 brick wide and two bricks tall). None of the neighbours seem ...
Max's user avatar
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1 vote
0 answers
166 views

Self Levelling and Liquid DPM over damp on ground floor quarry tiles - disaster

I have a question about rising damp on quarry tiles ground floor in old building. I removed the old carpet and realised there was damp patches on the tiled floor below, im believe there is no dpm ...
Wal Comps's user avatar
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Lime slurry crumbling after damp work done

last year we had a company come out to take everything back to brick in our kitchen and added a lime slurry to the wall as we had damp raised in our survey. This is what they done. Drill and inject ...
Megan Mitchell-Cox's user avatar
2 votes
0 answers
93 views

Brick property - Building over Damp Proof Course (DPC) ? Protecting wall with Membrane?

Someone mentioned to me that you could build above the external Damp Proof Course (DPC) as long as you protected it with a membrane Damp Proof Membrane (DPM). Im not convinced and think this will ...
sam's user avatar
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1 answer
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Should there be a gap between my patio door frame and the subfloor?

Under the door trim I have discovered a small gap between my patio door and my floor. It is about 1cm in width and 3cm deep. At the bottom it is concrete and my flooring above this is concrete. Should ...
User1's user avatar
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0 answers
2k views

What is causing a damp patch in patio door corner?

I have spotted a damp patch in the corner of my patio doors (pictures below). Things I have tried so far: Reseal the door inside and out patch up some mortar on the outside that was crumbling away ...
User1's user avatar
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0 votes
1 answer
320 views

Moisture in bay window bench seat

I live in a 1940s house with uninsulated double brick wythe exterior walls. The interior wythe has some kind of masonry skim coat. The front wall of the house has a bay window. Last spring, I built a ...
1941House's user avatar
2 votes
2 answers
141 views

Advice on injectable silicone-based damp-proof course

I have a 140-year-old house of heavy masonry (bluestone/basalt) construction. It is built into the side of a hill with about 25% of the "basement" actually below ground level: You can ...
Telescope2334's user avatar
1 vote
0 answers
333 views

Would a shed at the side of my house expose it to a risk of damp?

We're looking to maximise some garden/patio space by relocating our bike storage to a new shed at the side of our property. (See attached picture- apologies for the amateur editing!) The shed will sit ...
James Wiseman's user avatar
3 votes
2 answers
848 views

Will I lose a ton of efficiency by removing the blue foam insulation from my unfinished basement?

My house inspection noted that the exposed blue foam insulation in my basement is not to code and (if there’s a fire) could be dangerous due to noxious fumes. The insurance provider has told me to ...
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1 answer
389 views

Bricking up door/damp

I'm about to block up this doorway and have noticed damp in the bottom corner. If I were to lay a DPC between the screed and first layer of blocks, would that solve the issue....or is it going to ...
Phil Hawthorn's user avatar
1 vote
0 answers
92 views

Damp exterior bricks near the roof and windows

I been looking everywhere. Some say it could be a drainage issue or mold. Would anyone know what could cause this discoloration?
Angel's user avatar
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1 answer
631 views

How to determine if damp smell, marks, cracks, mould, on internal walls is from; rising damp : condensation or other

I live on the ground floor of an art deco complex, with 2 apartments above me. We have lived here for almost 13 years and have never had a problem with damp / mould issues....other than our bathroom ...
Leonie's user avatar
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2 answers
507 views

Can a wood cabin be laid directly on a existing concrete foundation if a DPC is added?

I am figuring out the foundation for a small wood cabin for my back garden, due to height being a premium I was wondering if I could put the wood directly on an existing garage foundation. Providing I ...
James McClelland's user avatar
2 votes
1 answer
1k views

DPC around a window (UK)

I had an integrated garage in the house. I have recently had a builder come and replace the garage door with a brick wall and a large bay window as I plan to turn this garage into an office. I have ...
Mark Hayward's user avatar
0 votes
0 answers
2k views

Lay a damp proof membrane followed by a self levelling compound

I have an uneven concrete floor inside. I need to put down a damp proof membrane and self levelling compound on top of that. My questions are: Is there any reason to use a roll of DPM vs a liquid one ...
Mr_Random_Guy's user avatar
-1 votes
1 answer
5k views

Damp proofing a single-skin outbuilding for batten & insulation

I have a small outbuilding (~2m x 4.5m) which I currently use for storing tools and my bicycle. It's a semi-detached single-skin construction with a concrete roof, concrete floor and single-skin brick ...
Michael Dodd's user avatar
2 votes
1 answer
5k views

What to do about gap in bottom of plasterboard wall when fitting floating floor (UK)

I have removed the skirting boards in my new build house, as I am going to fit engineered wood floor via the floating method. The issue I have is that after removing the skirting, I was presented ...
123's user avatar
  • 133
3 votes
1 answer
2k views

Can I remove excess damp proof membrane under garage concrete floor?

I recently moved into a house with a garage at the bottom of the garden which has a damp proof membrane (DPM) that protrudes out at the base of every wall by approx 4 to 5 inches. Can I safely trim ...
Bendihossan's user avatar
1 vote
0 answers
702 views

Where did the water under my basement floor come from?

I have just bought a house that had a continuous engineered oak flooring downstairs. There was an obvious buckle in the floor in the hall, at the centre of the house that we were told by surveyor/...
pingu's user avatar
  • 111
0 votes
1 answer
535 views

Has the DPC (damp proof course) failed if moisture is showing above paint?

We have just purchased our first house (hooray) and uncovered a few gremlins the home buyers report failed to pick-up. There was some damp on the wall behind a sofa in one room (which failed to get ...
Harrypot's user avatar
4 votes
2 answers
20k views

What can I do about a house with internal concrete floor with no DPM?

My partner and I have just bought our first home.A 1950's bungalow which is need of refurbishment. So far it has thrown us a ton of surprises! The worst so far being the floor in one of the bedrooms. ...
davey's user avatar
  • 171
4 votes
3 answers
215 views

Dealing with nicotine stains in a Victorian property

I am just in the process of buying an old property, previously lived in by heavy smokers. What is the best way to clean and prime walls to prevent nicotine stain recurrence in a solid brick Victorian ...
New House Buyer's user avatar
0 votes
2 answers
4k views

What is causing a wet patch on an internal wall?

We recently bought and moved in to a house. It's 16 years old. One of our walls has developed a patch of wetness. This wall is part of what was once the garage, and has since been converted into a ...
lynsey's user avatar
  • 1
8 votes
1 answer
2k views

What should I do about my rendering & damp-proof course?

I have a house that was built around 1890 and is of brick construction with a rendered band running around the base which also forms square edged columns around the front door. Until recently the ...
Gideon Purser's user avatar
3 votes
2 answers
7k views

Is snow piled against the outer wall likely to cause damp?

My question is basically that recently we have had a lot of snow, some of it is high enough to be over the damp-proof course (DPC). Should I be worried about this, or would damp penetration take ...
Paul Michaels's user avatar
2 votes
2 answers
3k views

Appearance of damp after dpc injection - can "good enough" plaster go soft?

Approximately 1 year ago we had a wall treated with damp proof course injections (silicone I believe) and we then rendered with a mixture including a relatively strong mix of good waterproofer. ...
Timbo's user avatar
  • 123
2 votes
1 answer
1k views

How can I damp proof this wall?

I have stripped plaster from our dining room walls to reveal the brickwork in preparation for plasterboard and skimming. The room features one main exterior wall and an adjoining wall. Prior to ...
Adam Houldsworth's user avatar
1 vote
2 answers
18k views

How do I render over a DPC (damp proof course)?

We own a 1930 house we cavity brick walls and have a few damp problems.., Our render goes over the top of our DPC (damp proof course). The DPC is only about 1cm above the level of the paving. So I ...
Walker's user avatar
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4 votes
2 answers
11k views

How do I fit a drain gully when the drain pipe is very close to the surface?

I wish to lower some paving round my house, as it is too close to the DPC (damp-proof course). However the drain pipe will not be very far under the new level of the new paving. Therefore how can ...
Walker's user avatar
  • 6,219