The LaSalle Bristol XTRM PVC RV Roof Membrane # 3441700534142711435 is not difficult to install, you may have some difficulty on your 2013 Flagstaff 8528IKWS due to the change in the roof, but as long as you keep the material tight it shouldn't bunch.
The LaSalle Bristol XTRM is made of Elvaloy-based PVC material making it harder to tear and rip, but giving additional flexibility compared to TPO. view full answer...