Line the attic ceiling with a plastic vapor barrier.
How to keep metal porch roof from sweating.
This will provide flow through ventilation at the point where the hottest air rises to.
Place a vapor retarder under floor gravel or concrete ventilate enclosed building when concrete is being poured and continue to ventilate.
The five key points to stop your metal roof sweating are.
The goal is to use as many full sheets of plywood as possible.
Fighting condensation factor 1 keep moisture from getting in.
Use the nail gain to affix the plywood onto the frame of the structure.
Roll out the vapor barrier and cut it to size with a utility knife to fit over the ceiling.
When conditions change the ambient air temperature usually rises thereby raising the dew point.
The lower the pitch of a metal shed roof and also the deeper the corrugations the.
The key to getting condensation to evaporate is air flow.
Tape it all the way around with duct tape so it is secure and make sure there are no gaps or seams for any moisture to get through.
The moisture is then released from the drip stop material back into the air in the form of normal humidity.
This roll of plastic will help keep the moisture from leaving the attic.
Hoist the plywood on top of the structure and line it up.
If there is no high level ventilation already installed install a 15cm ventilation grille at the highest point at each end of the eaves.
Having ventilation holes around the roof at eaves level and in.
You must have a vent at both ends not just one.