How much did you pay for damproofing ?

29 replies

Redlarge · 13/10/2024 15:17

I've been quoted £9k to damproof whole downstairs of small terrace house and one bedroom. Including plastering and new skirting boards. I wasnt expecting this much. What have others paid?

OP posts:

Original poster

Redlarge · 14/10/2024 20:24

Snugbug123 · 14/10/2024 16:22

We've also got a house around the same time period and has been a learning curve! As others have said damp means usually you need to fix something that is going wrong externally - e.g. wrong pointing material (cement vs lime), leaky gutter, drain issue, ground too high near the property etc. Injections or chemical solutions might be a temporary (expensive) plaster but won't fix the underlying issue. It's a bit more hassle working through what's causing it but will probably be a lot cheaper and more permanent!

Had a builder there today he identified that the render and pebble dash outside is too low and a gap should have been left. The chimney and gutters are causing a leak.

OP posts:

PigletJohn · 15/10/2024 00:44

Redlarge · 13/10/2024 16:00

I've had a surveyor out. He has identified leaking gutter and repairs needed on chimney which is obviously causing the high readings. But he actually recommended a dpc as he said there is no evidence of one in the property.

What town is your 1900 house in?

In the then London, DPC was compulsory since 1875

Other towns and cities took civic pride in keeping up.

Slate was usual. It lasts for millions of years and does not wear out.

Houses do not create water, it usually comes from leaking pipes or drains, which are buried and out of sight. It will be worse if airbricks have been blocked or the DPC bridged by raised soil or paving. These faults are all very common on older houses. Sometimes it is a spilling gutter or downpipe, or chimney. Almost never, an underground lake or spring,

Interestingly, silicone injections do not repair any of these faults,

kirinm · 15/10/2024 08:00

Hello98765 · 13/10/2024 15:46

Do not do this. Most damp resolves on its own.

That's a silly thing to say. It's all completely dependent on what's causing the damp.

OP, period properties need damp proofing in ways that more modern houses don't. We've just had a structural survey and were told that injections don't work in older properties.

Have a look at heritage house.

1983Louise · 15/10/2024 08:37

This does seem expensive, has the company been recommended to you as there are.lots of dodgy companies out there. Never pay money up front and see if you can check out their previous work if you do decide to go ahead.

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