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Advice needed for dealing with damp/mould issues

46 replies

AngeloMysterioso · 19/09/2021 11:36

Posting here as advised in another thread I started in Chat. This will be quite long as I want to include as much relevant info as I can; going to bullet point things for ease.

  • I live in a small, 2 bedroom ground floor flat at the bottom of a pretty steep hill, with my husband and 22mo DS. Currently pregnant with 2nd DC due early December.
  • The building I live in was built around 1910. It is now four flats but it’s such an odd shape that I really don’t think it was originally intended to be residential (have added floor plan).
  • There is a small lawn in the garden which sits about a foot higher than the bottom of the building at one end, on a slope so it gets higher further back. There are air bricks around the base of the building.
  • We moved in in December 2019- our neighbour in the other downstairs flat moved in summer 2019. We both had the usual surveys done and neither came up with any current or potential damp issues.
  • We had the extractor fan in the bathroom disconnected in April last year. This was necessary as it had been wired alongside our electric shower in such a way that it presented a serious safety risk. Until recently the bathroom window was always opened after every bath/shower (I say until recently because it’s now open pretty much all the time). Bathroom door has always been kept closed at all times. We have yet to have the extractor re-installed, purely for financial reasons but it is top of our to-do list and will hopefully be done before DC2 is born if we can afford it.
  • Due to the odd shape of the building, our bedroom has three external walls. The only internal wall is largely occupied by a fireplace which we intend to have professionally sealed (also on the to-do list). We have very tall wardrobes against one of these external walls, which we have had to fix to the wall at the top for stability, so they can’t be moved (have added floor plan for this too, furniture positions drawn in red).
  • Because the flat is so small, space and storage is an issue and we have things in every nook and cranny- as well as the large wardrobes we have under-bed drawers, things tucked under the changing table and cot bed in DS’s room, cupboard under the stairs is full to bursting etc. We have looked into storage but it is just too expensive at this time.
  • Last October we began to find things going mouldy; to start with it was the boots and shoes that are kept on shoe shelves in the bottom of my wardrobe. Then clothes in the under-bed drawers. Last week found mould on things kept in DS’s room and around the frame of his cot bed. So far we haven’t had any issues in the sitting room, bathroom or kitchen. So far there are no signs of mould on the walls. I have washed/scrubbed everything with copious amounts of white vinegar and sprayed the carpets under the bed and DS’s cot bed.
  • Our neighbour in the other downstairs flat says she also has a mould problem- in her case it actually is on the walls, and she has redecorated with mould resistant paint.
  • We do not have a tumble dryer, there is no space for one and we can’t afford a washer-dryer. We have dried clothes outside when the weather has allowed and quite often take a few loads up to the launderette but this is quite expensive so we have largely been drying clothes around radiators. I have recently bought a large heated airer with a cover and plan to use this, with the de-humidifier running beneath it, instead.
  • Ventilation has been an issue- we had very old, single-glazed wooden sash windows, the frames were in very poor condition with all manner of insects living in them so they were opened rarely. We have just had new UPVC sash windows installed so that will no longer be the case. The new windows do not currently have trickle vents, we have spoken to the fitter about this who is going to contact the manufacturer and see if they are able to be fitted with the type of windows we have. If it’s an option then we’ll be getting them fitted ASAP. Until then we will be opening the windows at least a crack every day. I have also started lifting up the mattress in DS’s cot bed every morning and leaning it against the side to allow more air underneath, and opening the wardrobe doors and drawers for a while each day as well.
  • We have also just been given a Meaco Low Energy 20l dehumidifier, which we will be running initially every evening and overnight until we can get humidity to a healthy level- target is 45%. The first night we had it it read 79% in my bedroom- it is now down to 65-70% depending on where we have it in the flat.
  • We have also had a slug problem- they are popping up mostly around the sofa and back door in the sitting room, and also between the bed and wardrobes in the bedroom. Not sure if this is related in any way.

So the advice I’m looking for is what other steps I can take to solve or at least mitigate this issue? Finances are currently very stretched and we now have the new windows to pay for so we can’t make any big purchases for at least the next few months, but I am otherwise open to any and all suggestions.

OP posts:
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AngeloMysterioso · 19/09/2021 11:38

These are the floor plans - the whole building and just our flat.

Advice needed for dealing with damp/mould issues
Advice needed for dealing with damp/mould issues
OP posts:
AngeloMysterioso · 19/09/2021 11:39

Also tagging in @PigletJohn who kindly posted in my other thread- you seem pretty well versed in this type of problem! Would be very grateful for any more advice you can give me.

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AngeloMysterioso · 19/09/2021 11:43

The sitting room and the main bedroom have been swapped round so both bedrooms are next to each other- made more sense that way as what is now the sitting room has an external door.

So in our bedroom (bottom right) we have going clockwise from the top - the main wardrobe (there is a radiator between the wardrobe and the wall on the right), the bed (it’s the kind with shelves in the headboard and a gap at the bottom so there is space between the main portion of the bed and the wall, but stuff in the under-bed drawers is still going mouldy), DH’s desk, a chest of drawers on one side of the fireplace and another small wardrobe between the fireplace and the door on the other.

DS’s room has built in wardrobes in one corner, then the changing table by the fireplace, DS’s cot bed in the opposite corner by the window, then a tallboy chest of drawers and the glider chair. Another very small set of drawers tucked in between the door and the wardrobes.

Kitchen- fridge by the door. Bin next to the sink- there’s a weird sort of ridge about a foot high which sticks out about 4 or 5 inches which I’ve drawn in as well.

Sitting room- bureau against the left wall, dining table in the top left corner, then the chimney breast which is where the radiator is now. Other side of that is a sideboard type unit with the tv on. Sofa against the opposite wall by the back door and a small side table next to it.

OP posts:
PigletJohn · 19/09/2021 12:09

the slugs are probably due to damp under the floor. Take some boards up along the external wall.

Please post some pics of the outside of this wall, showing the DPC and airbricks (if any), and any drains, gullies or downpipes. Look for any paving, ground or concrete that is cracked, patched, or sunken, or any that is unexpectedly new looking.

NeilBuchananisBanksy · 19/09/2021 12:17

I posted on your last thread. You need uk really open the windows every day, even in winter. The upvc double glazing is likely to make things worse until you get on top of it all.

Don't block up the fireplace. That can itself cause damp. Old buildings aren't designed to be hermetically sealed. Prior

NeilBuchananisBanksy · 19/09/2021 12:18

Gah, pressed send!

Prioritise the extractor in the bathroom and getting a washer dryer.

Plus looking for any sources as pigletjohn has advised.

HavfrueDenizKisi · 19/09/2021 12:34

We have lived in many old properties and our current one has original sash windows (so single glazed).

In my experience you must have air flow:

Windows open at the top (we have stops in ours so they can stay safely open a few inches all the time). Top open is better than bottom in case of rain.

Large furniture pulled a few inches away from walls (especially external walls) for air flow.

Not cramming things under beds/on top of wardrobes etc. Hard but you have to be ruthless.

Why would you block your fireplace??? This is an excellent flow of air.

Heating on more than an hour in the morning/night. This really is important. Older properties need more heating to keep condensation etc under control. Yes it will cost you more unfortunately.

We have a heated airer and I stand it next to an open window.

Plus check gutters are clear and not leaking onto walls; down pipes are working correctly and all air bricks are clear around the exterior.

HavfrueDenizKisi · 19/09/2021 12:34

And extractor fan as said by PP. get the best possible one installed ASAP.

InTheNameOfAllThatIsHonest · 19/09/2021 12:37

Run the dehumidifier 24/7

PigletJohn · 19/09/2021 12:42

"Kitchen- fridge by the door. Bin next to the sink- there’s a weird sort of ridge about a foot high which sticks out about 4 or 5 inches which I’ve drawn in as well."

this might be a duct for the soil pipe from the WC if I interpret your diagram correctly. Especially if the floor is concrete so it would be too much effort for the builders to dig it up to run to the nearest manhole or underground drain. Is there a manhole outside in that direction?

TakeYourFinalPosition · 19/09/2021 12:46

The extractor fan will make a WORLD of difference. I used to rent a similar building and the mouldy things/damp/slugs were horrendous if the extractor fan wasn’t used regularly.

Can you get that done quickly?

I’d prioritise the extractor fan, and running the dehumidifier all the time until that’s done and to dry it out a bit once it is. You’ll also probably find that you’re not heating the place enough, two hours a day doesn’t really work for most older buildings.

I’d second unblocking the fireplace, too.

PigletJohn · 19/09/2021 12:46

look under the sink at the waste pipe. Does it run towards this duct?

PigletJohn · 19/09/2021 12:49

the bathroom extractor will typically have a 4"/100mm diameter plastic duct going through the wall, with a plastic vent outside. Does yours?

Is the fan above the bath? If so, how high above the floor?

How far is it from the ceiling light fitting?

PigletJohn · 19/09/2021 12:56

"things going mouldy; to start with it was the boots and shoes that are kept on shoe shelves in the bottom of my wardrobe. Then clothes in the under-bed drawers."

this is consistent with damp from the floor.

Are these all wooden floors?

For the moment, try under-bed plastic storage crates with tight-fitting lids (not the ones with a hinged lid)

you will have to dry everything very thoroughly before boxing it. If you have an airing cupboard this will be helpful. Otherwise a laundrette tumble drier.

Do you have a water-meter?

GreenestValley · 19/09/2021 13:54

Eek, I think you should be considering moving out temporarily while it clears up if it’s so bad that clothes and shoes are going mouldy? Damp is really dangerous to live in day in day out and could affect your DS e.g. lungs etc.

AngeloMysterioso · 19/09/2021 14:00

Ok, so airbricks etc- these are the ones under the windows outside our room and DS’s room

Advice needed for dealing with damp/mould issues
Advice needed for dealing with damp/mould issues
OP posts:
AngeloMysterioso · 19/09/2021 14:01

Drain on the corner of the house by main bedroom window, can’t see any obvious faults with it

Advice needed for dealing with damp/mould issues
Advice needed for dealing with damp/mould issues
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AngeloMysterioso · 19/09/2021 14:03

Path at the side of the house, this is the wall that my bed and the side of the wardrobe is against and also where a few slugs have popped up in my room- no airbricks on this wall, no obvious cracks or sunken areas in the path.

Advice needed for dealing with damp/mould issues
OP posts:
AngeloMysterioso · 19/09/2021 14:14

Airbrick at the base of the wall that the back of the wardrobe in my bedroom is against (which upstairs neighbours have put a planter against) and another drain. Some sort of cover or something fell down from the top of the pipe last week, I’ve circled in red where it fell off.

Advice needed for dealing with damp/mould issues
Advice needed for dealing with damp/mould issues
Advice needed for dealing with damp/mould issues
OP posts:
AngeloMysterioso · 19/09/2021 14:17

Airbricks at base of sitting room wall. This is where the slugs have popped up, they seem to surface by the back door and migrate to the wall under the sofa. Or maybe it’s the other direction…

Advice needed for dealing with damp/mould issues
Advice needed for dealing with damp/mould issues
OP posts:
AngeloMysterioso · 19/09/2021 14:20

Bathroom- the fan is right below the ceiling. (This is a temporary window, the glass wasn’t ready when they came to fit so it’s going in next week)

Advice needed for dealing with damp/mould issues
OP posts:
PigletJohn · 19/09/2021 14:32

"Airbrick at the base of the wall that the back of the wardrobe in my bedroom is against"

there is green moss or algae around here, so it must be long-term damp.

Does the ground slope towards it, causing puddles?

PigletJohn · 19/09/2021 14:33

"Airbricks at base of sitting room wall. This is where the slugs have popped up"

see if you can scrape away the stone scalpings to see what is underneath. The airbrick is rather close to the ground.

PigletJohn · 19/09/2021 14:35

Between the two doors, where the rainwater downpipe and the soil pipe come down, appears to be a small brick plinth. Can you take some pics around this, please.

is there a dark brown glazed clay gulley inside?

PigletJohn · 19/09/2021 14:41

"Ok, so airbricks etc- these are the ones under the windows outside our room and DS’s room"

this pic shows a shed or something, with a sloping roof, positioned so that rain falling on the roof will run against the wall, making it wet. Unless it has a gutter that I can't see? Is it your shed?

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