The last couple of months I've been having great fun building a shed/greenhouse/summerhouse in my graden. Concrete base, timber structure, windows, 2mm perspex roof at an angle of around 10 degrees.
Trouble is, the inside of the roof is constantly coated in condensation, to the point where droplets are dripping onto the floor. Any idea how I can prevent this?
Most of the advice I've seen regarding these sorts of problems is to ensure there's adequate ventilation. Well my shed hasn't had any doors on it for the past 6 weeks, so air circulation shouldn't be a problem.
The conrete has had plenty of time to dry out, and the rest of the inside of the shed is dry - no moisture on the windows, and the wood is dry (and has been treated). I've applied sealant all around the inside sides of the roof, just in case rain was seeping in.
I'm trying to work out why the condesation is forming, and what I can do to stop it. Presumably it's because the air inside the shed is slightly warmer (although I can't see how, when there are no doors on the shed) and the outside of the roof is cooler - so the water condenses out of the air.
A friend suggested placing a sheet of 1/2 inch plywood over the roof (ie sitting on top of the perspex) during the winter. It would be a bit of pain removing it in the spring and putting it back on in the autumn, but if it solves the problem, I might have to.
Before I spend 40 quid on plywood, though, does anyone have any suggestions? If I added another sheet of perpsex, say 10mm below the existing sheet, I'd end up with sort of double glazing. Would the air layer between the two sheets help prevent condensation?
Trouble is, the inside of the roof is constantly coated in condensation, to the point where droplets are dripping onto the floor. Any idea how I can prevent this?
Most of the advice I've seen regarding these sorts of problems is to ensure there's adequate ventilation. Well my shed hasn't had any doors on it for the past 6 weeks, so air circulation shouldn't be a problem.
The conrete has had plenty of time to dry out, and the rest of the inside of the shed is dry - no moisture on the windows, and the wood is dry (and has been treated). I've applied sealant all around the inside sides of the roof, just in case rain was seeping in.
I'm trying to work out why the condesation is forming, and what I can do to stop it. Presumably it's because the air inside the shed is slightly warmer (although I can't see how, when there are no doors on the shed) and the outside of the roof is cooler - so the water condenses out of the air.
A friend suggested placing a sheet of 1/2 inch plywood over the roof (ie sitting on top of the perspex) during the winter. It would be a bit of pain removing it in the spring and putting it back on in the autumn, but if it solves the problem, I might have to.
Before I spend 40 quid on plywood, though, does anyone have any suggestions? If I added another sheet of perpsex, say 10mm below the existing sheet, I'd end up with sort of double glazing. Would the air layer between the two sheets help prevent condensation?
