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211Racing's avatar
211Racing
Explorer
May 27, 2022

New Roof Time! Can I just layer over the existing plywood?

Got an old, unkempt 2002 Tioga 25' Class C RV recently (really cheap). Fixed the mechanical issues. Now going after the roof. Whatever they last used for a roof membrane, it is almost completely go...
BurbMan's avatar
BurbMan
Explorer II
May 27, 2022
That is a structural panel where the styrofoam and plywood is all vacuum bonded together. I would clean up the roof as you describe, then go over it with 1/8" (3mm) plywood so you have a nice clean surface, then get a roll of EDPM rubber membrane and cover the roof with that. Glue it down. Seal around vents, etc. with Dicor self-leveling lap sealant. If the rig had a rubber roof on it before there is probably trim around the edges you can reuse.

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