Will Porous Tape Help Make Unlevel Seams on Roof Flat Enough for Alpha Systems Roof Membrane
Updated 01/19/2026 | Published 08/06/2024
Question:
I had questions about the Alpha roof replacement. The video is a great resource. However, I noticed a significant decking height difference around the 23 minute mark in the video. I understand this is not part of the Alpha systems replacement, but my question: Is this difference of uneven decking normal and if following the repair directions compensate for the uneven decking? Refer to step 3 in the Alpha system directions and the photo attached.
asked by: Barry L
(click to enlarge)
(click to enlarge)
Expert Reply:
Great question, Barry!
Yes, that difference in the decking is normal and if you follow the instructions for the Alpha Systems Superflex TPO RV Roof Membrane # AL23CV by putting a porous tape over those seams then it will help level everything out.
Product Page this Question was Asked From
Alpha Systems Superflex TPO RV Roof Membrane - Beige - 40' x 9-1/2'
- RV Roof Repair
- Roof Membrane
- TPO Membrane
- Rubber Roof
- TPO Roof
- 40 Feet Long
- Beige
- Alpha Systems
more information >
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Kate F.
1/19/2026
Hey Barry, how did things turn out with the Alpha roof replacement after you followed the directions with the porous tape over the seams? It’d be great to know if that helped even out the decking. Your update could make it easier for the next person working on the same repair.