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Mould in new build

32 replies

Eumy · 14/04/2022 09:25

Apologies for the long post, but I’m super stressed and I’m finding it really hard to enjoy our new house.

So. My partner and I bought a new build, and moved in last month. We have a 2 month old baby, and specifically wanted a new build so we wouldn’t need to do any immediate decoration or have any major issues. We’ve had a new build before, which had some minor snags, but nothing to put us off buying another.

Our new one is twice the size of our previous house. In the time since we reserved ours, prices for the same house have increased 15-20k, for a worse plot. The location is amazing, good schools, commute and bus links. The house is well sized for a new build and the layout is exactly what we wanted.

We’ve had a few minor snags, which are mostly cosmetic. And you can tell it was built in a rush with not much care (standard for new builds, and will be covered over once we decorate properly). However what is getting me down (and which we didn’t have in our old new build) is flipping mould growth!! It doesn’t get counted as a snag as the houses need to dry out, and I knew this could be a potential issue, but I assumed the precautions I’d taken were enough!!

We’ve had all the trickle vents open, heating has been on 4hrs a day (20c) despite the cost. We’ve been opening the windows when we can, but it’s been raining. Plus we need to keep the cat in and the baby warm. I thought I’d been careful about keeping things away from walls to let air circulate, but apparently not careful enough!

It’s mostly been on the skirting boards, and has wiped off. I’ve then treated the area with bleach. I’ve ordered a dehumidifier to try and help, and I’ve moved furniture even further away from the walls.

I’m super stressed, and I’m paranoid checking each bit of fluff and mark on the wall. I’m worried about my baby potentially breathing in spores. Is there anything else I can do to prevent mould growth? How long am going to have to check for mould? I’m really starting to regret moving and miss our old house even though it was way too small!!

OP posts:
TheSandgroper · 14/04/2022 14:49

Well, after your update, I would take plenty of photos and get a statutory declaration from that cleaner.

Then find the industry ombudsman and ask for good information. They may not offer advice but information is always good.

SheSaysShush · 14/04/2022 18:21

It's not normal but common. A sealed box needs proper ventilation. I had a positive input ventilation system fitted in my 250 year old house because of damp and mould. The company who did it have a contract with a new build housing company...

Northernsoullover · 14/04/2022 18:24

@bellac11

Condensation is nearly always about lifestyle and how you occupy a property

Trickle vents are useless, they dont let enough air in. We have our windows open all year round.

This isn't quite true. It can be caused by structural faults.
bellac11 · 14/04/2022 18:38

I dont know about faults as such but I know that I wouldnt have cavity wall insulation as Ive read about that causing condensation so it can be structural but the most common reason is lifetyle.

WhatyadoingDH · 14/04/2022 20:03

We have had mould and I used the black mould remover spray I got from tescos. It contains bleach as it smells of it but must contain vinegar or other killing agents. It killed the mould which didn't return,

Mummy7420 · 28/07/2023 17:14

Hello, I know this is an old thread - but what was the conclusion if you are able to update me? We have the same issue in our new build and being told it’s normal - the developer have been working with us on the issue to rectifying it, but I don’t see how having so much mould is the usual state of play! Advice would be helpful from the original poster - thank you.

Mould in new build
Mould in new build
ChadCMulligan · 28/07/2023 19:54

This isn't entirely relevant to you, but may be of some interest to you and others.

We've been building a house in Poland and everyone is obsessed with drying houses out in stages.

Once we had the walls up, sub floors and roof poured (concrete) and roof on we left it without windows for six months while we did utilities.

Once the windows were in and the walls plastered it was left to dry for a while with windows open.

After the screed was poured we left it for 12 weeks, and then ran a three week screed drying program with multiple dehumidifiers.

We've had humidity sensors in every room logging data for 18 months now through the various stages.

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