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Green mould in Garage advice
Hi, first time poster and complete novice gardener. In the last 10 months we've bought our own house which has a lovely mainly paved back garden.
Long story short there's been a problem with green mould in the garage, we had an old worn down summerhouse next to it. I was advised the issue was water pooling at the back of the garage cause of the angle that rain was coming off the summer house roof. So last summer I tore the summer house down leaving some old decking which I've just started taking up and once done making some kind of plant bed.
In respect of the garage I've scraped all the mould off the walls, re-sealed the garage, used anti-mould paint and got a dehumidifier in there.
So the advise I'm after is, what would you recommend to put down to increase absorbing the moisture? What are low maintenance plants? Any more tips to help reduce the mould in the garage? Cheers Cat 🙂
Long story short there's been a problem with green mould in the garage, we had an old worn down summerhouse next to it. I was advised the issue was water pooling at the back of the garage cause of the angle that rain was coming off the summer house roof. So last summer I tore the summer house down leaving some old decking which I've just started taking up and once done making some kind of plant bed.
In respect of the garage I've scraped all the mould off the walls, re-sealed the garage, used anti-mould paint and got a dehumidifier in there.
So the advise I'm after is, what would you recommend to put down to increase absorbing the moisture? What are low maintenance plants? Any more tips to help reduce the mould in the garage? Cheers Cat 🙂


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In our old house, the garage was permanently wet because of it's position, and it also had the down pipe just sending water down the back of it. We created a raised bed with rock, leaving a gap between it and the route the water took from the pipe, and just gravelled that part so that the water could filter away.
You'll probably find that once you remove the rest of the decking base, you'll be able to create a bed there no problem. You'd need to factor in how/where you create it, so that you can access it well for maintenance etc.
I live in west central Scotland - not where that photo is...
Have you been tracking the changes since you took down the summer house? How has the garage been since then? How is the mould inside and out?
If I understand right, you shouldn't have a moisture problem any more as the cause was removed last year.
Does the garage have good/new/strong guttering? It's useful to have it on structures, to direct rain away from problem areas.
Welcome to the forum, Catherine.
if not the decking, then the screen block walling behind looks very high compared to where the dpc should be.
I think there is/was a damp proof course but as mentioned we've only been in the house ten months so not 100%. The garage has decent guttering and since I did the mould proof paint and garage seal the mould doesn't seem to have come back but it's still early days.
In respect of the plant bed once I've removed the decking and dug it out, do I do chipping at the bottom and earth on the top to help with the moisture? Thanks again Cat