I have a small carport (32' wide x 22' deep) on which I have installed
Palram | PALTOP corrugated sheets. This stuff is a lightweight PVC foam sheet. It has been on there about 5 years. It seemed like it was pretty durable, but several sheets came loose last spring during a big windstorm we had.
I got this stuff @ Home Depot, and marketing materials on the shelf proclaimed a 10 year warranty (which on the website seems to have been reduced to 5 years) I called the manufacturer with my complaints, and it seems the only things the warranty covers are hail damage and color fade. On top of that, it seems I didn't install it correctly. I used self-drilling sealing screws in all of the valleys, directly to the purlins. They want you to use their special "closure" strips and put the screws through the hills.
What failed was the material around the screws; cracks developed about 1/2" away from the fasteners, which let the material lift off. Once the first section got started, there was more 'sail area' which made it easier for the next set to fail, etc. I think this is a combination of some of the fasteners were too tight, which stressed the material, and because I put the fasteners in the valleys, which are curved and not flat.
I need to replace the entire roof. I want something that is not translucent, and is durable. My handyman neighbor is saying I should just sheath it and put standard asphalt shingles to match the house, but I think that might be too much weight. I thought about using metal sheets, but that would be too loud, and this is right outside my bedroom window. There's another company that makes an asphalt-based corrugated roofing sheet, but from what I've read on the 'net, it's not suitable for anything larger than a garden shed.
So, should I try this PalRuf material again, and use the special purlin strips? Or is there another option of which I'm not yet aware?
