This Seattle PVC flat roof project in the Madison Park area, near the south end of Lake Washington, replaced a severely leaking torchdown roof with a lifetime-warranty 80 mil IB PVC membrane by IB Roof Systems. Because the home sits on the water, Pinnacle Roofing Professionals installed the membrane using a two half-sheet method for added wind-uplift protection and custom-fabricated 4-inch stainless steel scuppers at the roof curbs.
Project Overview: Madison Park Flat Roof Replacement
Flat roofs on waterfront homes in Seattle face extra exposure to wind and rain, so material selection and installation method matter. For this Madison Park home, the old torchdown roof was leaking and needed to be removed. The Pinnacle Roofing crew installed an IB Roof Systems 80 mil PVC membrane, a heat-welded, single-ply system designed for low-slope applications. The two half-sheet layout was used to improve wind resistance, and the custom scuppers were built to handle drainage at the roof curbs.



Flat Roofing Materials and Details
- 80 mil IB PVC membrane by IB Roof Systems with lifetime warranty
- Torchdown roof removal and deck preparation
- Two half-sheet installation method for enhanced wind uplift resistance
- Custom 4-inch stainless steel scuppers at roof curbs
- Heat-welded seams and complete flashing system
If you have a leaking flat roof or need a torchdown replacement in Seattle, Madison Park, or anywhere on the water, contact Pinnacle Roofing Professionals or call 206.919.3538 for a free estimate.