Has anyone got a corrugated metal garage roof with plastisol coating, drip stop backing, or similar, does it actually work and stop all condensation? Don't want my bikes and tools getting dripped on.
The reason the drips form is due to the materials/temperature differential. I would board the roof with OSB, use a roll of roofing membrane and fix the metal to that to be absolutely certain it will be dry - this is how I did my shed/workshop roof and it’s been dry, despite 90mph winds trying to tear it off.
Has anyone got a corrugated metal garage roof with plastisol coating, drip stop backing, or similar, does it actually work and stop all condensation?
Our big barn is covered with this, we don't get condensation on the roof but we still get a bit from the steel frame that holds it all up.
The lining on the sheets works well though.
(The idea of that it doesn't necessarily stop the condensation but it holds it and stops it from dripping)
Edit: we also have a stable that has the same roof but without the drip stop on the sheets and the difference is noticeable.
My garage roof is galvanised corrugated sheets with a breather membrane below (this directs any condensation down and into gutter). Insulation between rafters and ply below as the ceiling. Then when they come and unbolt a roof panel the buggers still can't get in and wake the dog instead.
If you've got concerns about high winds use cyclone plates/washers too.
This kind of thing:
https://www.bremick.com.au/product/cyclone-plate-colorbond-without-seal/
I’ve got a 25mm composite metal roof. White inside, 25mm foam, outside colour choice and matching trims.
The only timber needed is a few joists, the panels are long enough to cover the whole garage with no horizontal joints.
No complaints at all, no condensation, the only condensation is on the single skin brickwork.
Thanks for that good to know, now I've seen how .uch companies want to do it I think I'll have to give up some free days and do it myself.
ive got a small shed roofed with corrugated steel with the plasticote top and the anticon lining on the underside. It does seem to work
I have another shed without it, and that does get condensation even though it has an open side and loads of ventilation.
the panels looked pretty easy, there are some YouTube videos I’ve seen since.
i think I paid £1k about 10 years ago for a 4*7 garage and that included a waste transfer note for disposal of old asbestos roof. I think I got lucky though as the guy seemed to do warehouse roofs and I suspect this was fill in/pocket money work during quieter times.
I've fitted a small amount before.
A decent driver, some butyl tape and self-drilling screws and you're off.
The hardest bit is getting the roofing sheets up and in place without scratching any other sheets. 💪🏻
I replaced a 8x8m square garage roof a couple of years ago. Three blokes with no experience, three days in all. I tipped off the local scrap man and he called by daily to collect the scrap from the drive. The anticon works a treat btw, but I have a constant draught (on purpose) because I season wood in on half, as well as drying clothes.
Limiting factors for me were physical strength, hauling the sheets up is hard work. Also, once the sheet's in place and the next one is on its way up we were slowed by only having one decent driver. A combi drill works but the driver is much better.
Having more than one ladder helps as does a copious supply of fixings.
Finally, keep a close eye on the position of the joists you're screwing into, it's easy for your mates (ahem) to miss them if you take your eye off the ball.
My top tip is never slide the sheets across each other as you separate them. Always lift a corner and peel/lift them off without sliding otherwise you will 100 % scratch them.
Actually you probably will slide them and end up scratching them when the cut ends touch the sheet below. But at least I can say I told you so.
Secondly a small pointy punch and hammer will make getting the fixings in much easier. Even a stout nail and hammer would work