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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Laying flooring over compromised foundation /damp

8 replies

Sunflower960 · 19/11/2024 10:09

Hi.

I have recently moved in to a house that has damp.
After having the house replasterd (with dpm) I have taken up the flooring to see theat the concrete slab is very thin, uneven, cracked and not ideal at all. The damp issues in the house are definitely coming from this problem.
I have been advised by a groundsman that the whole floor in my living room is dug out and new laid. (Not yet received the quote)
Problem- I have just paid £3k to have a media wall installed and do not want to comprose this as you can imagine.

Before the laminate was removed, the actual flooring did not appear to have any issues as a plastic membrane had been put under and it kind of trapped the moisture underneath. This flooring has been down for at least 5 years looking back at pictures on rightmove.

Iv also had someone round to quote for flooring before the groundsman came and he said the floor is not ideal for LVT and that he would advise carpet laying in the livign room instead, as this is breathable and any moisture underneath will be evaporated through the fabric.

I don't know what to do.
My options will be to wait for the quote from the groundsman, dig floor out, compromise the media wall and have a load more work going on in my house around freshly plastered walls etc
Or
Lay flooring back down with the info that the flooring person has advised. I.e. carpet in living room and LVT elsewhere.
Has anyone experience of laying flooring on a concrete slab like this?

OP posts:
JacquesHarlow · 19/11/2024 10:36

There is a property and DIY forum, @Sunflower960

www.mumsnet.com/talk/property

ScottBakula · 19/11/2024 10:47

I have a concrete floor , two rooms were knocked into 1 before I moved in ( over 20 yrs ago ) the rear of the house is damp due to many many years of bad gutters/ damage bricks + moter and rotten window frames.
They all go fixed but the damage was done to the gloor and I didn't realise how bad it was.
A few years ago I had to throw away my carpet due to mould I could get rid of so I left bare concrete For 8 months during summer time to try to get it to dry out.
Them put 12 millimetre laminate down , it warped within 6 months.
So u put thin carpet back down , so far it's OK but it's been a relatively dry year.
I was advised not yo use a waterproof barrier under the carpet as it would impead the drying.

OchAyeTheN00 · 19/11/2024 10:48

You can have a liquid damp proof membrane put down which is what we did. Won’t then need to have your wall destroyed.

OutVileJelly1 · 19/11/2024 10:49

Where there is damp there is probably Mould which is a killer, very bad for lungs.

I would get rid of it at any expense

If you throw down flooring for a quick fix now you could end up regretting this

Sunflower960 · 19/11/2024 12:14

ScottBakula · 19/11/2024 10:47

I have a concrete floor , two rooms were knocked into 1 before I moved in ( over 20 yrs ago ) the rear of the house is damp due to many many years of bad gutters/ damage bricks + moter and rotten window frames.
They all go fixed but the damage was done to the gloor and I didn't realise how bad it was.
A few years ago I had to throw away my carpet due to mould I could get rid of so I left bare concrete For 8 months during summer time to try to get it to dry out.
Them put 12 millimetre laminate down , it warped within 6 months.
So u put thin carpet back down , so far it's OK but it's been a relatively dry year.
I was advised not yo use a waterproof barrier under the carpet as it would impead the drying.

Thanks.
This is what they had said to me- to not put membrane under carpet but I can't get my head around how the carpet won't be damp/mouldy in no time.
Laminate will trap moisture yes but surely the carpet will soak it up and smell?

OP posts:
Sunflower960 · 19/11/2024 12:15

OchAyeTheN00 · 19/11/2024 10:48

You can have a liquid damp proof membrane put down which is what we did. Won’t then need to have your wall destroyed.

You mean like a hard setting resin material or a paint type? Which did you have?

OP posts:
ScottBakula · 19/11/2024 12:31

Yes I have been worried about that too, so far it seems OK but with nothing down for 8 months I hope it's dried enough .
It seems OK atm but as I say it's been dry so winter time will tell.

OchAyeTheN00 · 19/11/2024 14:27

Sorry I have no idea. He told us what he’d use face to face and it was over a year now. Just a liquid DPM is all I remember.

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