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New Build - Single Skin Garage - Condensation (13 posts / 2,742 views)
808
Posts: 198
#1 14 Dec 2025 14:22
0
Anyone got any suggestions for cost-effective solutions to the above problem? Will painting the walls with a damp proof paint actually do much?.
Tinhead Tinhead
Posts: 17,089
#2 14 Dec 2025 16:05
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In reply to Post #1
Not sure if damp proof paint is what you want, I'd wait for someone with more knowledge but uou could try a paint with cork in it.
I used Rempro on a wall within a conservatory and it definitely takes the chill off the wall.

vossy1 vossy1
MODERATOR
Posts: 9,046
#3 14 Dec 2025 16:19
0
In reply to Post #1
Our old garage had a asbestos roof and this time of year it was always dripping. I ended up putting a drain in and ground a channel all round the foundations just inside the shed, directing the condensation with tarps to the outer wall, so it ran down into the channel.

Fast forward a move, concrete sectional with single skin steel roof, it's terrible going into winter drips on everything, Recenlty had the door/facias/window replaced and the guys who came said aren't you having the roof done I bet the condensations a mare...They said their roofs have some layer on insulation on the inside, I can only assume it's some sort of foam sprayed on and it virtually eliminates condensation. I'm thinking that may be a option for you if a retrospective thing that's done, the only alternative I can think of is boarding out but OSB is so expensive now.
framey framey
Posts: 5,319
#4 14 Dec 2025 16:59
0
In reply to Post #3
I built a standalone shed/workshop
I battoned the blocks put polystyrene sheets between for the walls,OSB on top for fixing into.
Poly in the roof and floor as well and it's actually warm in there and hasn't suffered with any condensation in 15 years YET....
Tinhead Tinhead
Posts: 17,089
#5 14 Dec 2025 21:25
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The OP was asking about paint but if he wants to ho down the insulation route I recently clad a single brick wall with 25mm Cellotex, plasterboard over the top and got someone to plaster it.
Plasterboard may not robust enough for a garage so you could use ply or something but as mentioned its going to be expensive.
Probably why the OP wants to use paint
808
Posts: 198
#6 15 Dec 2025 05:09
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In reply to Post #5
Paint and price was a consideration, but also ease. My mate reckons a proper air vent tile roof tile could help?.
scozza
Posts: 18,421
#7 21 Dec 2025 20:07
2
In reply to Post #1
One word. Ventilation

Or some proper insulation may help.

Edit, just read that, your mates spot on for me, I would have one on either end to allow the air to blow through

808
Posts: 198
#8 22 Dec 2025 08:45
0
In reply to Post #7
I know a roofer, he is coming round to give me a quote.
vossy1 vossy1
MODERATOR
Posts: 9,046
#9 22 Dec 2025 08:54
0
In reply to Post #8
I'm not so sure. Our metal uninsulated roof drips like a swine when it gets really cold and it's got lots of ventilation, too much tbh, dust got everywhere, think a 1" gap under the door 8' long, unsealed facia boards, and 2" x 5" gaps where the roof meets the concrete uprights, and none of that helps.

Running a dehumidifier would be pointless and costly, the only real option is insulation but as I don't intend to stay in this house more than 5 years it aint worth the investment, so tarps it is.

EDIT, if you do a search on this it says it's due to metals high conductivity, ie, it'll be colder than the surrounding warmer air, as the air cools on the metals surface the moisture level can't be held and condenses out. Best analogy I can think of is cars, loads of ventilation but always wet in the same circumstances.
Tinhead Tinhead
Posts: 17,089
#10 22 Dec 2025 14:34
0
In reply to Post #9
I would give the paint with cork in it that I mentioned a go.
You don't have to do the whole garage, buy a small quantity and try it out on a small area.

Singlebleep Singlebleep
Posts: 2,380
Site deviant...
#11 22 Dec 2025 15:26
1
Skull cap maybe? Everyone who has a Tempest raves about them. You can leave them in place apparently
scozza
Posts: 18,421
#12 26 Dec 2025 19:37
0
In reply to Post #11


Twin skin?
808
Posts: 198
#13 11 Jan 2026 08:16
0
Skull cap does make a difference thats for sure!!.

I am going to get the tile fitted then go from there need to decide if I want to stay here long term if we do I will look at new door and go the whole hog. Cheers for the advice.
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