- 27 Jul 2021
- Reaction score
- County Durham
I'm pretty confident of the water tightness of the wall and render so I wonder if this will be helpful or not. What do you think please?the problem is that you have constructed the shed without seeking advice until you've nearly finished and in so have now severely limited your options . There is little to gain in now being petulant with those that are trying to help you .
Your problem now is not trying to exclude water vapour from outside the shed with a vapour check . What you need to do is to extract the water vapour which will form every night when the temperature drops . Warm air during the day will store a lot of water in the form of vapour but when the temperature drops the air molecules have to shed that vapour because they are unable to retain the moisture .
You can either install an extractor in the roof of the shed ,(preferably at the highest point ,) or you can install a dehumidifier which will extract and store the moisture and will require emptying periodically.
These are simple,cheap and very effective options for your situation that will cause minimal installation disturbance .
The other thing you might consider is how hot the inside of the shed will become when the outside temperature rises and the sun is beating down on the timber flat roof. Some form of extraction system will be essential if you intend to work in the shed in comfort during Summer months . Opening the door and windows is unlikely to provide adequate through ventilation