Damp in shed
Moderator: Moderators
- davek0974
- Senior Member
- Posts: 514
- Joined: Mon Dec 24, 2007 10:27 am
- Location: Hertfordshire
- Has thanked: 103 times
- Been thanked: 20 times
Damp in shed
Hi all,
I have a 8x6 wooden shed, only built a couple of years back. I made the cardinal error of using up some spare kingspan insulation and lined the roof with ply.
Yep, you guessed it i now have mould. I have pulled the lining down and removed the insulation, left the window open for a few days in the warm weather and things are drying out now but i have a very thin layer of light green mould on some areas of the underside of the marine ply roof sheet.
The issue was made worse by the spill-vent on the single UPVC window being left shut as well.
Is there anything i should do with this or just brush/vacuum it off and leave it as-is??
There does not appear to be any lasting damage to the structure.
Thanks
I have a 8x6 wooden shed, only built a couple of years back. I made the cardinal error of using up some spare kingspan insulation and lined the roof with ply.
Yep, you guessed it i now have mould. I have pulled the lining down and removed the insulation, left the window open for a few days in the warm weather and things are drying out now but i have a very thin layer of light green mould on some areas of the underside of the marine ply roof sheet.
The issue was made worse by the spill-vent on the single UPVC window being left shut as well.
Is there anything i should do with this or just brush/vacuum it off and leave it as-is??
There does not appear to be any lasting damage to the structure.
Thanks
DIY - Joining things together to make stuff ;)
https://davekearley.co.uk/
https://davekearley.co.uk/
-
- Senior Member
- Posts: 16941
- Joined: Fri Jan 20, 2006 5:51 pm
- Location: Essex
- Has thanked: 807 times
- Been thanked: 3498 times
Damp in shed
I would use a bleach solution. Paint it on liberally and leave it to dry out, by the morning it will have killed the mold and you can brush it off. Obviously, use eye and mask protection.
DWD
DWD
- These users thanked the author dewaltdisney for the post:
- davek0974 (Tue May 30, 2023 7:48 am)
- Rating: 7.14%
- davek0974
- Senior Member
- Posts: 514
- Joined: Mon Dec 24, 2007 10:27 am
- Location: Hertfordshire
- Has thanked: 103 times
- Been thanked: 20 times
Damp in shed
Sounds good, just a normal bleach cleansing mix?
DIY - Joining things together to make stuff ;)
https://davekearley.co.uk/
https://davekearley.co.uk/
-
- Senior Member
- Posts: 16941
- Joined: Fri Jan 20, 2006 5:51 pm
- Location: Essex
- Has thanked: 807 times
- Been thanked: 3498 times
Damp in shed
Yes,household bleach mixed in water, not too diluted. I painted some gates that were green, and by morning and a jet wash down they were clean. I also had a green shed wall and that was cleared overnight after painting with the solution.
DWD
DWD
- These users thanked the author dewaltdisney for the post:
- davek0974 (Tue May 30, 2023 8:31 am)
- Rating: 7.14%
- davek0974
- Senior Member
- Posts: 514
- Joined: Mon Dec 24, 2007 10:27 am
- Location: Hertfordshire
- Has thanked: 103 times
- Been thanked: 20 times
Damp in shed
The bleach seems to have neutralised any mould, smells a lot better now.
However the shed is still not right, i'm guessing it needs air flow. There is a vent strip at the top of a single UPVC window and that is full open now, but the humidity in there is still way too high, not sure why?
Its measuring about 42% indoors at present but the shed is showing 75% and feels very humid. I'm guessing this is bad.
The shed is joined on to a double concrete garage which has been lined and decorated and now houses a pool table. There are no opening vents in this part at all. I was weary of adding vents as in the winter it is kept at a min 7c with background heat to stop the table getting too cold etc.
Any ideas here - i'm looking to stop any damage occurring to the tools in the shed or the decoration/table in the garage part, picture of pool area below.
However the shed is still not right, i'm guessing it needs air flow. There is a vent strip at the top of a single UPVC window and that is full open now, but the humidity in there is still way too high, not sure why?
Its measuring about 42% indoors at present but the shed is showing 75% and feels very humid. I'm guessing this is bad.
The shed is joined on to a double concrete garage which has been lined and decorated and now houses a pool table. There are no opening vents in this part at all. I was weary of adding vents as in the winter it is kept at a min 7c with background heat to stop the table getting too cold etc.
Any ideas here - i'm looking to stop any damage occurring to the tools in the shed or the decoration/table in the garage part, picture of pool area below.
DIY - Joining things together to make stuff ;)
https://davekearley.co.uk/
https://davekearley.co.uk/
- aeromech3
- Senior Member
- Posts: 3598
- Joined: Fri Feb 26, 2010 11:16 am
- Location: Ash Surrey
- Has thanked: 177 times
- Been thanked: 665 times
Damp in shed
I find my wooden shed, open space on all sides, feels humid, and 75% is a hi moderate level, I am guessing the wood holds some moisture and a flat roof will have a large temperature range during sunny days, your venting should improve matters but check for staining on the roof wood indicating leaks.
- davek0974
- Senior Member
- Posts: 514
- Joined: Mon Dec 24, 2007 10:27 am
- Location: Hertfordshire
- Has thanked: 103 times
- Been thanked: 20 times
Damp in shed
Thanks, the roof is good, it has an EPDM sheet glued on and appears to be in mint condition, there is no staining on the inside or sign of any water ingress.
My guess is to add some through ventilation, maybe even forced by a small fan ?
I'm just not sure whats best. Today the house is reading 45% and the shed/pool room is reading 70% still
My guess is to add some through ventilation, maybe even forced by a small fan ?
I'm just not sure whats best. Today the house is reading 45% and the shed/pool room is reading 70% still
DIY - Joining things together to make stuff ;)
https://davekearley.co.uk/
https://davekearley.co.uk/