Commercial Roofing System in Seattle for Lasting Protection
At Washington Weather Shield, we design and install commercial roofing systems engineered for the demands of the Pacific Northwest. Clean installs. Systems tailored to your building.
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High-quality roofing systems for commercial buildings
We design and install commercial roofing systems engineered for the demands of the Pacific Northwest.
Why Choose Washington Weather Shield for Commercial Roofing Systems
Choosing the right commercial roofing system is only part of the equation. The real difference comes from how it is planned, installed, and managed.
With our roofing systems, you get predictable performance, clean job sites, and clear communication. Here’s what sets our service apart.
Leak-Free Performance Pledge
Documented QA to promote consistent installation quality and dependable leak protection.
Portfolio Care for PMs & Owners
Free roof audits, 3-year capital planning, and priority scheduling across your properties.
Clean Site Guarantee
Walkways kept clear, common areas protected, and daily cleanup completed to maintain a tidy, professional jobsite.
On-Time, On-Budget Scorecard
Transparent milestones, change orders, and progress photos. We start when promised and finish as bid.
Certified Crews, Modern Systems
Authorized installation of premium commercial roofing systems backed by ongoing training.
Warranty & Protection
20–30 year manufacturer warranties for qualifying new roof installs. See our Warranty & Protection page for more details.
Types of Commercial Roofing Systems We Install
Every commercial roofing system is a combination of materials, detailing, and installation quality. The right solution depends on your building’s design, how the space is used, and your long-term maintenance goals. We design each system to align with your roof layout, daily operations, and project timeline, helping minimize disruption while supporting long-term performance.
Below are the primary types of commercial roofing systems we install across Greater Seattle and the Puget Sound:
TPO Roofing Systems — Single-ply membrane (often white or grey) that reflects heat and helps reduce energy costs. Lightweight and cost-effective, with heat-welded seams that create a strong, watertight seal. Well-suited for flat roofs across Western Washington.
PVC Roofing Systems — Durable single-ply membrane designed to resist chemicals, grease, and standing water. Heat-welded seams form a reliable waterproof barrier. Performs well in Seattle’s wet climate and offers strong fire resistance.
Roof Coating Systems — Fluid-applied systems installed over existing roofing to improve waterproofing and extend service life. Seamless application helps protect aging roofs when the underlying structure remains sound.
Metal Roof Systems — Long-lasting panel systems designed for sloped commercial roofs. Fire-resistant, low-maintenance, and available in multiple profiles to match your building design.
Commercial Composition Roofing Systems — Architectural asphalt shingle systems used on sloped sections of commercial buildings. Cost-effective and suitable for offices, multi-family, and mixed-use structures with pitched roof areas.
Dec-Tec / Walkable Deck Systems — Waterproof PVC membrane designed for decks, balconies, and roof patios over occupied space. Built to handle regular foot traffic while protecting the structure below.
EPDM Roofing Systems — Flexible rubber membrane that expands and contracts with temperature changes. Known for reliable long-term performance and lower upfront cost. A practical solution for many low-slope commercial roofs.
Final Cleanup and Jobsite Reset
Ongoing daily cleanup throughout the project and a final walkthrough to ensure the jobsite is clean, safe, and ready for normal operations.
Drainage and Gutter Improvements
Ensuring water moves off the roof properly to prevent ponding and future issues.
Flashing and Edge Metal Upgrades
Replacement or integration of flashing, edge metal, and penetration details to strengthen perimeter protection and support long-term leak prevention on commercial roof replacements.
New Roofing System Installation
Installation of the new commercial roofing system using certified methods and manufacturer-approved details, completed by an experienced commercial roof replacement contractor.
Substrate and Deck Evaluation & Repair
During commercial flat roof replacement, decking, insulation, and structural elements are evaluated and repaired as necessary to support the new roofing system, whether installed as a tear-off or overlay.
Roof Preparation and Selective Removal
When we replace a commercial roof, our approach depends on existing conditions and system design. Projects may involve a full tear-off or selective removal to properly prepare the roof, with clean, controlled debris handling to protect the building and surrounding areas.
Complete Roofing Solutions
A commercial roofing system performs best when installation, repair, and maintenance work together over time. Whether you need a targeted repair, a long-term plan, or a full replacement, we manage each project with a clear process, organized communication, and clean job sites.
Commercial Roof Replacement
Full replacements for aging and failing commercial roofs, including tear-off and recover options and long-term performance materials.
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Commercial Roof Repair
Targeted repairs that stop leaks and prevent further damage, from flashing and membrane fixes to storm damage.
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Commercial Roof Construction
New roofing systems for commercial construction projects, with drainage and slope planning across TPO, PVC, metal, and low-slope systems.
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Commercial Roof Waterproofing
Fluid-applied waterproofing and coating systems that protect aging roofs and extend service life.
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Commercial Maintenance & Cleaning
Routine maintenance and cleaning that protects drainage, catches issues early, and extends roof life.
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Meet Your Commercial Roofing System Team
Meet the team responsible for delivering dependable workmanship and consistent project performance.
Ivan Prokopets
Rita Prokopets
Washington Weather Shield Team
Our Commercial Roofing System Installation Process
We keep the process straightforward so you can make decisions with confidence. Whether you are reviewing new roof systems or replacing an aging roof system, you will always understand the next step and what to expect. Here’s a simple three-step process to get started.
Step 1: Schedule Your Free Roof System Evaluation
We visit the property, evaluate the existing conditions or project plans, and document current conditions with photos.
Step 2: Approve Your Scope and Project Plan
You receive a clear estimate with commercial roofing system options, recommended scope of work, and timeline, so expectations are established before the work begins.
Step 3: Installation, QA, and Project Closeout
Our crew completes the work, manages cleanup, and keeps you updated throughout the project. At closeout, you receive the documentation needed for warranty support and future roof planning.
Why the Right Commercial Roofing System Matters
A commercial roofing system affects more than the roof surface. It impacts interior protection, tenant comfort, maintenance budgets, and long-term asset value.
The right roofing system helps reduce unexpected repairs and emergency calls, while the wrong system can lead to recurring issues over time. Our role is to help you select a commercial roofing system that supports reliable performance, predictable maintenance, and long-term peace of mind.
Client Testimonials
Our work is measured not just in completed roofs, but in the confidence property managers, owners, and contractors feel throughout the process. These testimonials reflect that commitment.
I hired Ivan for a TPO roofing project, and I couldn’t be happier with the results. He stepped in on very short notice right before the rain was coming, which helped us avoid major issues. His work was professional, clean, and done exactly the way it needed to be.
Roman Gural
Washington Weather Shield replaced a metal and PVC roof on one of our custom Mercer Island homes and did an excellent job. Great communication, skilled crew, and top-quality work from start to finish. Highly recommend!
Remont Construction
Excellent roofing company! Washington Weather Shield just did an apartment building for us. Definitely our go to roofer going forward. Delivered a superior product in a timely manner and on budget as promised. Super professional every step of the way and great communication. Thank you Washington Weather Shield! Highly recommended! A++++
Mark Caldwell
What Clients Say About Our Roofing Work
When people search for a local commercial roof replacement company, they want steady communication and reliable results. See what Seattle businesses say about working with our commercial roofers.
FAQs on Commercial Roofing Systems
What is a roofing system?
A roofing system includes all components that work together to protect a building from water, weather, and temperature changes. This typically includes the roof membrane or panels, insulation, attachment method, flashing, and drainage components.
Commercial roofing systems are designed to manage water flow, temperature movement, and building expansion and contraction — not just cover the roof surface.
What is the most common roofing system used today in Seattle?
On commercial properties throughout Greater Seattle and the Puget Sound, single-ply membrane roofing systems are among the most common choices, particularly for flat and low-slope properties such as office buildings, warehouses, retail centers, and multi-tenant facilities. Single-ply membranes include options like TPO, PVC, and EPDM, with TPO roofing systems frequently specified because of their balance of energy efficiency, heat-welded seam strength, and cost-effectiveness in wet, rain-heavy climates.
Which TPO roofing manufacturers does Washington Weather Shield install?
Washington Weather Shield installs commercial TPO roofing membrane systems from GAF, Duro-Last, and Versico. We are certified installers for all three manufacturers, allowing qualifying systems to be installed in accordance with manufacturer requirements for warranty eligibility of 20-30 years.
We are also a GAF GoldElite™ Commercial Contractor, a certification awarded to contractors who meet GAF’s standards for commercial installation quality and training.
Manufacturer selection typically depends on project specifications, building conditions, and long-term performance goals. We recommend the TPO roofing membrane system that best fits the needs of the property.
What is the most efficient roofing system?
The most efficient roofing system depends on the building, roof design, and insulation strategy. For many flat roof systems, single-ply membranes like TPO or PVC provide good energy performance when properly installed. The best commercial roofing systems are those designed for the building’s use, not selected based on material alone.
How do you protect your commercial roofing system?
Protecting a commercial roofing system starts with regular inspections and basic maintenance. Clear drains, sealed penetrations, and early repairs prevent small issues from turning into larger problems. Limiting foot traffic and having a documented maintenance plan helps extend the life of commercial roof systems and keeps costs predictable.
What is a TPO roofing system?
A TPO roofing system is a single-ply membrane commonly used on commercial flat roof systems. The seams are heat-welded to create a continuous, watertight surface. TPO roofing systems are known for durability, energy efficiency, and compatibility with many commercial roof designs.
What is the best metal roofing system?
The best metal roofing system depends on the building and performance needs. Standing seam commercial metal roofing systems are a popular option due to their strength, longevity, and low maintenance. Proper detailing, attachment, and drainage design are more important than the metal type itself.
What is an EPDM roofing system?
An EPDM roofing system is a rubber membrane used on flat and low-slope commercial roof systems. It is flexible, durable, and performs well in varying temperatures. EPDM flat roof systems are often chosen for their long service life and ease of repair.
What is a GAF roofing system?
A GAF roofing system refers to commercial roofing systems installed using GAF-approved materials and methods. GAF is a manufacturer, not a roof type. When installed by certified contractors, GAF commercial roofing systems may qualify for extended manufacturer warranties.
What affects the price of commercial roof systems?
The cost of a commercial roofing system depends on several factors, including your roof size, existing roof condition, system design requirements, and the level of work needed to achieve a durable, watertight installation. A well-designed commercial roofing system balances upfront cost with long-term performance and maintenance predictability.
Common factors that affect cost include:
- Roof size (total square footage) and building configuration
- Manufacturer of the roof system
- System type for your commercial roof system (TPO, PVC, EPDM, coatings, or commercial metal roofing systems)
- Tear-off vs recover
- Insulation upgrades and code requirements (often important for flat roof systems)
- Drainage improvements such as crickets, additional drains, scuppers, or ponding corrections
- Roof complexity, including curbs, skylights, parapets, penetrations, and rooftop equipment
- Site access and staging requirements such as lifts, cranes, and material loading zones
- Occupancy considerations including tenant coordination, work hour limitations, and protection of operations
- Warranty level and manufacturer system requirements for qualifying coverage
- Deck repairs if deterioration is discovered during tear-off or preparation
Do you offer written estimates and detailed scopes of work?
Yes. Washington Weather Shield provides written estimates and detailed scopes of work for commercial roofing projects. Your proposal outlines system recommendations, scope, timeline, and warranty coverage options so you can compare bids clearly and make a confident decision.
How do contracts and payment schedules work for commercial roofing projects?
At Washington Weather Shield, all commercial roofing contracts must be signed prior to the start of the project. Our standard payment schedule is 50% upfront to order materials and secure your installation dates on our calendar, with the remaining 50% due upon completion of the project. For larger commercial roofing projects, progress payments may be requested during the duration of the work, depending on the size and scope.
Are your commercial roofing contractors licensed and certified?
Yes. Washington Weather Shield is fully licensed, and our commercial roofing team is trained and certified to install roofing systems using manufacturer-approved methods for long-term performance and warranty compliance. We are certified with top commercial roofing manufacturers, including GAF (TPO & PVC), Versico (TPO & PVC), Duro-Last (PVC), and GE Enduris—and we’re especially proud to hold GAF GoldElite™ Commercial Contractor status, a highly selective certification level.
What training do your roofing crews receive each year?
At Washington Weather Shield, our commercial roofing crews complete ongoing hands-on training to stay current on the latest installation methods, safety standards, and manufacturer requirements. This includes training and education through top roofing manufacturers such as GAF (TPO & PVC), Versico (TPO & PVC), Duro-Last (PVC), and GE Enduris, helping ensure every roof we install meets professional standards and warranty guidelines.
Do you work with manufacturer-backed roofing systems?
Yes. Washington Weather Shield installs manufacturer-backed commercial roofing systems. All of our roofing systems are built using trusted, manufacturer-approved materials and installation methods to support long-term performance and warranty eligibility.
How do I know I’m hiring a qualified commercial roofer?
A qualified commercial roofer should have proven experience with commercial flat and low-slope roofing, proper licensing and insurance, strong safety practices, and the ability to provide detailed scopes, references, and warranty options. At Washington Weather Shield, we meet these standards through our commercial roofing expertise, manufacturer certifications, and our commitment to professional installation methods and long-term roof performance.
Our Service Areas
Providing commercial roofing services in Seattle and surrounding communities — 47 cities across nine counties.
Tap a city to see it on the map.
Cities
- Seattle
- Tukwila
- Bellevue
- Renton
- Kent
- Auburn
- Federal Way
- Redmond
- Kirkland
- Bothell
- Everett
- Lynnwood
- Edmonds
- Mountlake Terrace
- Shoreline
- Burien
- SeaTac
- Des Moines
- Issaquah
- Sammamish
- Mercer Island
- Newcastle
- Maple Valley
- Covington
- Black Diamond
- Snoqualmie
- North Bend
- Carnation
- Duvall
- Woodinville
- Mill Creek
- Lake Forest Park
- Kenmore
- Fife
- Milton
- Puyallup
- Sumner
- Bonney Lake
- Lakewood
- University Place
- Steilacoom
- Gig Harbor
- Bremerton
- Port Orchard
- Silverdale
- Olympia
- Lacey
Counties We Serve
Our Service Areas
Providing commercial roofing services in the Puget Sound and Greater Seattle areas.
- Bellevue
- Seattle
- Tacoma
- Kent
- Renton
- Federal Way
- Auburn
- Redmond
- Olympia
- Kirkland
- Tukwila
- Puyallup
- Lakewood
- Burien
- SeaTac
- Everett
- Chehalis
- Bellingham
- Marysville
- Lacey
- Des Moines
- Kenmore
- Black Diamond
- Sumner
- Sammamish
- Shoreline
- Bothell
- Bremerton
- Edmonds
- Lynnwood
- Issaquah
- Parkland
- University Place
- Spanaway
- Maple Valley
- Mercer Island
- Covington
- Mukilteo
- Centralia
- Enumclaw
- Snoqualmie
- Gig Harbor
- Fife
- Shelton
- Milton
- Pacific
- Bonney Lake
Working Project
Finished Project
Get a Commercial Roofing System Built for Your Building
Get a clear plan for your commercial roofing system in Seattle. We will inspect your roof, document conditions, and recommend the right next step with no pressure.