Bellevue Commercial Roof Project, WA | Landmark Shingles + 80 Mil PVC
Pinnacle Roofing Professionals, LLC completed this Bellevue commercial roof project in Bellevue, Washington. The property needed a complete roofing solution that addressed both steep-slope and low-slope areas, so we combined CertainTeed Landmark architectural shingles with a high-performance 80 mil PVC membrane by IB Roof Systems. This hybrid approach gave the building a unified, attractive appearance on the steep sections while providing long-lasting waterproofing on the flat areas.
Why Combine Composition Shingles with PVC Flat Roofing?
Many commercial buildings have mixed roof planes—some pitched and some flat. Using one material for every surface is not always practical or cost-effective. For this Bellevue project, the steep-slope sections received CertainTeed Landmark shingles, a proven architectural asphalt product, while the low-slope sections received a heat-welded 80 mil PVC membrane. The combination delivers curb appeal, durability, and reliable water protection across the entire building envelope.
CertainTeed Landmark Shingles for the Steep-Slope Sections
CertainTeed Landmark shingles are a popular choice for commercial and residential properties that need a durable, attractive composition roof. Their dual-layer construction and color-blended design provide dimensional curb appeal and strong protection against wind, rain, and algae staining. Landmark shingles are backed by a solid manufacturer warranty and are well-suited to the wet, variable climate of the Pacific Northwest.
80 Mil PVC by IB Roof Systems for the Flat Roof Areas
For the low-slope portions of the building, we installed an 80 mil PVC single-ply membrane by IB Roof Systems. The thicker 80 mil membrane offers extra puncture resistance and durability compared to standard commercial membranes. The seams are heat-welded rather than taped or glued, creating a monolithic, watertight surface that resists ponding water, chemicals, and UV exposure. This is a smart solution for flat commercial roofs that demand long-term performance with minimal maintenance.
Commercial Roofing Expertise in Bellevue, WA
Pinnacle Roofing Professionals is a licensed roofing and electrical contractor with experience on commercial, multi-family, and HOA properties throughout Bellevue and the Eastside. We handle tear-off, decking repairs, steep-slope shingle installation, low-slope PVC and TPO systems, flashing, ventilation, and final inspections. Learn more about our commercial roofing services, composition roofing, and flat roofing options, or view our Bellevue, WA services.
Get a Free Commercial Roof Estimate in Bellevue, WA
Planning a commercial roof replacement or new roof in Bellevue? Pinnacle Roofing Professionals provides detailed inspections, honest estimates, and expert installation for mixed-slope and flat commercial roofs. Call 206.919.3538 or request a free estimate today.