What Do I Need to Replace the Roof on a 2018 Grand Design Reflection 315RLTS?
Updated 10/21/2026 | Published 10/20/2026
Products Featured in This Question
Question:
Im looking to replace the roof on my 2018 Grand Design Reflection 315RLTS travel trailer. Its about 38 feet long and the original roof is starting to show its age. Would this Alpha Systems kit have everything I need to redo the roof or do I need to order other materials separately?
asked by: Brian
Expert Reply:
Hey Brian!
The Alpha Systems SuperFlex Roof Installation Kit # AL75EF is a great starting point for replacing the roof on your Reflection!
It includes 2 gallons of adhesive, 6 rolls of butyl tape, 15 tubes of self-leveling sealant, and 2 tubes of non-sag sealant. The actual roofing membrane is sold separately.
For your trailer, I'd recommend looking at the Alpha Systems SuperFlex TPO Roof Membrane # AL42CV, which measures 40' x 9-1/2. We also have the longer 45' roll # AL62CV if you need a bit longer of a roll.
You'll want to measure your actual roof, including the material needed to wrap over the front, rear, and sides, before choosing a roll.
Do you know your roofs actual dimensions? I can help narrow down which membrane size you'll need.
Product Page this Question was Asked From
Alpha Systems SuperFlex RV Roof Membrane Installation Kit - Gray - 26' and Longer
- RV Roof Repair
- Roof Installation Kit
- Metal Roof
- Rubber Roof
- TPO Roof
- 30 Feet Long
- Gray
- Alpha Systems
more information >
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Brian
10/21/2026
Thanks Andrew. I'll measure and grab one of those rolls. The 40 foot roll should work for me.