Corrugated tin, hands down.
Just plywood is crap, it will delam and rot in a couple years. Plywood + shingles = similar total cost in materials to tin but with much more labor.
The corrugated tin installs with just a couple screws in each end of each panel. Labor wise, you're looking at major savings. All you need is a cordless drill and you can build a roof in like 20 minutes.
The corrugation is actually very rigid and can span up to 6 feet without any under-girdering.
Over 6 foot span and you'll want to run a 2"x4" down the middle of the roof, from wall to wall, PERPENDICULAR to the corrugation, and put two screws through each panel into this girder.
For perfect water sealing you'll want to use special tin roofing screws with a steel and rubber washer installed into each screw, which you can find at the hardware store, but you can get away with normal screws, it won't leak that much at all.
And yes, the plastic corrugated roofing is cheap but has a very limited life span.
-todd
Just plywood is crap, it will delam and rot in a couple years. Plywood + shingles = similar total cost in materials to tin but with much more labor.
The corrugated tin installs with just a couple screws in each end of each panel. Labor wise, you're looking at major savings. All you need is a cordless drill and you can build a roof in like 20 minutes.
The corrugation is actually very rigid and can span up to 6 feet without any under-girdering.
Over 6 foot span and you'll want to run a 2"x4" down the middle of the roof, from wall to wall, PERPENDICULAR to the corrugation, and put two screws through each panel into this girder.
For perfect water sealing you'll want to use special tin roofing screws with a steel and rubber washer installed into each screw, which you can find at the hardware store, but you can get away with normal screws, it won't leak that much at all.
And yes, the plastic corrugated roofing is cheap but has a very limited life span.
-todd
