Where Should Butyl Tape Go When Installing Rood Membrane?
Updated 10/23/2025 | Published 04/02/2025
Question:
When installing side trim does the butyl tape go on the camper then tpo membrane then another strip of butyl on the trim? The video shows you adding under membrane but didnt notice any butyl added to the trim. I hope this question is clear enough to understand. Thank for your response.
asked by: Rich N
Expert Reply:
Hello Rich, good question. One layer of butyl tape is typically enough to keep things sealed. So if you do one layer under the membrane that should be fine. You can add a second layer on top of the membrane for extra protection if you wish, but it would not be necessary.
Product Page this Question was Asked From
Alpha Systems Superflex TPO RV Roof Membrane - White - 20' x 9-1/2'
- RV Roof Repair
- Roof Membrane
- TPO Membrane
- EPDM
- TPO
- 20 Feet Long
- White
- Alpha Systems
more information >
Continue Researching
- Q&A: Will Dogs Hear MouseBlocker PROx Electronic Rodent Deterrent
- Shop: RV Roof Membrane
- Shop: Revive Peel-and-Stick RV Wallpaper Kit - 100 sq ft - 50' x 2' Roll - Organic Linen
- Shop: Revive Peel-and-Stick RV Wallpaper Kit - 100 sq ft - 50' x 2' Roll - Whitewash Planked Wood
- Shop: Revive Peel-and-Stick RV Wallpaper Kit - 400 sq ft - 100' x 4' Roll - Oatmeal Linen
- Shop: Revive Peel-and-Stick RV Wallpaper Kit - 100 sq ft - 50' x 2' Roll - Sketch Linen
- Shop: Revive Peel-and-Stick RV Wallpaper Kit - 400 sq ft - 100' x 4' Roll - Crisp Linen
- Shop: MouseBlocker PROx Electronic Rodent Deterrent - 12V DC
- Shop: MouseBlocker PROx Plug In Electronic Rodent Deterrent - 110V AC
- Q&A: Does Sticky Residue on Roof Need to be Removed to Install Roof Membrane on RV
- Q&A: What is the Thickness Of The Alpha Systems Superflex TPO RV Roof Membrane?
- Q&A: Which Swing Away for Bike Racks Would You Say is Beefier in Design the Kuat or Swagman?
- Q&A: Trailer Wiring Harness Recommendation for a 2006 Jeep Wrangler Unlimited LJ
- Q&A: Which Replacement Motor for Lippert 369777 RV Stabilizing Jacks
- Q&A: How to Program Replacement MaxxAir Remote with MaxxAir Roof Vent
- Article: 30-Amp and 50-Amp RV Service: What's the Difference?
- Article: Camping Tips for First-Time RVers
- Article: The Ultimate RV Camping Checklist for Your First Year RVing
- Article: How to Replace a Rubber RV Roof
- Article: RV Roof Types: What Type of Roof Does My RV Have?
- Article: 5 Things to Know About Weight Distribution Hitches
- Article: Pintle-Hitches
Jesse M.
10/22/2025
Hey Rich, how did things go with sealing the side trim using the butyl tape and TPO membrane? Your update could make it easier for the next person working on the same roof setup.