Can I Install AlphaPly RV Roof Membrane Directly Over My Existing Rubber Roof?  

Question:

Expert Reply:

Hey Karl, thanks for reaching out. For the Alpha Systems AlphaPly Roof Membrane # LC625DV, I recommend removing the existing roof membrane rather than installing the new material directly over it. You want the new membrane bonded to a clean, solid, properly prepared roof deck, and leaving the old rubber in place can hide water damage, trapped moisture, or areas where the original adhesive has already failed. Removing the old material also gives you a chance to inspect the plywood or other roof decking and make any necessary repairs before laying down the new membrane.

This particular AlphaPly membrane comes in a 9-1/2' wide by 100' long roll, so it's a great option for larger RV roof replacements where you want to cover the roof with one continuous piece rather than creating unnecessary seams. You'll also want to use an Alpha Systems-approved adhesive and compatible sealant # AL68WF around the roof edges, vents, and other openings to get a proper watertight installation.

Are you replacing the roof because the original membrane is starting to deteriorate, or have you already found water damage underneath it?

What camper are you servicing?

expert reply by: Jesse M

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