Adhesive for Aluminum roof to plywood?
My husband and I are rebuilding a camper and are about to get to our roof install. We are doing a seamless aluminum roof which will be going over plywood. We want to avoid using any type of screws as ...
Forum Discussion
Having worked for 6 years in mobilhome mfg and then owned my own mobilehome/rv repair business and specializing in structures and exteriors for a while just about all roofs we saw and worked on had a fiber board of varius brands or luan type of plywood of various brand names across the roof ribs. This was some years back.
Now we did find some older cheap brand rv's that was just aluminum roofing over roof ribs. Fiber boards and luan was shot down with staples and aluminum roofing was glue down to help prevent roof rumble. We still see some older mobiles with old tires laying around the roof... for that reason.
Roof rumble did two things .
The worst was noise on windy days and especially nites the aluminum actually flapped in the center if not glued down. This is where a fast setting glue is used. Never add screws on a roof covering except around roof fixtures and roof jacks and in molding around the edges. The less holes up there the less chance of a leak down the road.
The second is like others have said aluminum constantly expands/contracts and if not glued down works the sealant till it isn't bonded anymore. Wind does this on a mobilehome. Same principle as the rv is pulled down the road at highway speeds.
Another thing we found is aluminum roofing gets brittle with age (20+ years). Especially if the unit was left outside in the sun.
Now we did find some older cheap brand rv's that was just aluminum roofing over roof ribs. Fiber boards and luan was shot down with staples and aluminum roofing was glue down to help prevent roof rumble. We still see some older mobiles with old tires laying around the roof... for that reason.
Roof rumble did two things .
The worst was noise on windy days and especially nites the aluminum actually flapped in the center if not glued down. This is where a fast setting glue is used. Never add screws on a roof covering except around roof fixtures and roof jacks and in molding around the edges. The less holes up there the less chance of a leak down the road.
The second is like others have said aluminum constantly expands/contracts and if not glued down works the sealant till it isn't bonded anymore. Wind does this on a mobilehome. Same principle as the rv is pulled down the road at highway speeds.
Another thing we found is aluminum roofing gets brittle with age (20+ years). Especially if the unit was left outside in the sun.
