Gig Harbor, WA
Haven of Rest
Metal Retrofit · TPO Upgrade
Roof retrofit upgrading aging standing-seam metal to a TPO system, no full tear-off needed.
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Commercial Roofing Company Servicing Seattle
Commercial Roofing Services in Seattle
Washington Weather Shield is a commercial roofing company, working across the Greater Seattle area, including the city of Seattle. We only work on commercial buildings, specializing in flat and low-slope roofs.
5.0 Google · 40 reviews
30-Year Warranty
Tenant-First Install
SUMMER SPECIAL
Up to $5,000 Towards a Roof Replacement
*Terms apply. Offer expires 12/31/26
Request a Free Estimate
Same-day callback Mon–Fri. We’ll inspect, scope, and quote in writing.
Greater Seattle Commercial Flat Roofing Company
Flat roofing systems designed for long-term performance
We are a commercial flat roofing company in Seattle known for well-managed projects and consistent communication.
A reliable partner for organized, well-managed roofing projects
Commercial Roofing Contractors Who Make Your Job Easier
Hiring a Seattle-based commercial roofing contractor should take work off your plate, not add to it. We keep projects organized, document progress, and maintain safe, clean job sites throughout the installation process.
Here's how our commercial roofing work helps property managers, owners, and GCs:
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.
Complete commercial roof care from inspection to installation
Our Commercial Roofing Services in Seattle
We provide commercial roofing services throughout Seattle, from new roof installations and replacements to repairs and routine maintenance.
Each service is focused on keeping your roof reliable, watertight, and perform for the long-term.
We build new low-slope roofing systems for ground-up buildings, additions, and complete roof replacements.
Each roof assembly is designed to meet current building codes and withstand wind, heavy rain, and severe storms.
Our team selects the right materials and installation approach for the building’s performance, drainage, and warranty requirements.
We provide scheduled inspections, drain clearing, and seam checks to catch small issues before they become costly repairs.
This proactive maintenance helps extend the life and performance of your roof.
It is the foundation of our Portfolio Care program.
When your existing commercial roof is beyond repair, we can install a new TPO or PVC system through a complete tear-off or roof overlay.
We tailor the scope to your building, budget, and warranty goals.
Our team helps you select the right system for lasting protection, reliable performance, and long-term value.
We repair commercial roofing systems throughout Seattle by tracing leaks to their source, restoring damaged seams and flashing, and correcting areas of ponding water.
We document what we find and provide clear updates throughout the process.
This allows you to review the full scope before approving the repair work.
When a roofing project exposes the deck, we upgrade the insulation to meet Seattle’s R-38 energy-code requirement.
This helps improve the building’s energy efficiency and long-term roof performance.
We remove moss, dirt, and debris using a cleaning method designed to protect the roofing membrane.
Our careful approach helps preserve the roof’s condition without compromising its manufacturer warranty.
When storm damage compromises your commercial roof, we respond quickly to stabilize the damaged area. Stopping further water leakage and greater damage potential.
Once we control the immediate issues, we come back to complete the permanent repair.
Roofs built to withstand the Seattle weather
Planning Around Seattle's Wet Season
Seattle roofs receive about 37 inches of rain in a typical year. Rain falls on roughly 148 to 150 days during the year. Nearly half of it comes between November and January, according to National Weather Service averages.
Standing water is one of the first things we check. After several wet days, water can collect around drains and low areas. These spots are often where leaks begin. Clearing the drainage system early is simple and affordable. It can also prevent a much larger repair.
Roof seams often wear faster than the main surface. Repeated wet and dry cycles pull at the areas where membrane sheets overlap. On older TPO and PVC roofs, separated seams are one of the most common problems we find. When caught early, the repair can often be completed in one day.
Seattle’s dry season is short. Roof tear-offs and coatings need dry weather to bond properly. These projects are usually scheduled from late spring through early fall. Repairs and emergency stabilization can be completed throughout the year.
This is why it is important to hire the right commercial Seattle roofing contractor. Building professional roofs, repairing and maintaining existing roofs, and even providing emergency repairs if storms cause any damage. Washington Weather Shield provides these and more for commercial properties across the city of Seattle and beyond.
Spot problems early, maintain and repair for long-term performance
What Seattle Commercial Property Managers Notice First
Small changes in a commercial roof can be early signs of a larger problem. Seattle property managers who know what to look for can catch these issues sooner, reduce repair costs, and help extend the life of the roof.
Water That Sits For Days
Water that remains on your roof a day or two after the rain usually points to a drainage or slope issue. Ponding water is one of the most common problems we correct in Seattle.
It is also one of the least expensive to fix when caught early.
A Stain Far From The Leak
A ceiling stain may appear far from the actual leak. Water can travel through the roof system before it begins to drip.
We trace the moisture back to its source, which is often a loose seam or worn flashing.
Heating Bills Continue To Increase
Rising heating bills may point to an underinsulated roof. Many older roofs fall below today’s R-38 insulation standard.
Adding insulation during your next re-roof can improve energy efficiency and reduce the strain on your HVAC system.
Roof Near The End Of Its Life
Blisters, a stiff membrane, and recurring leaks may mean your roof is nearing the end of its life. We provide a free inspection and clear photos of what we find.
You receive a detailed scope and budget that you can share with ownership.
Permits And Codes, Handled For You
Commercial roofing in Seattle runs through the Seattle Department of Construction and Inspections. We pull the permits and carry the paperwork.
When a Re-Roof Permit Applies
A commercial or multifamily re-roof permit is required once you repair more than 500 square feet or replace the roof cover, sheathing, or insulation.
The city issues it the same day through the Seattle Services Portal. A standard re-roof skips the field inspection and closes with an Affidavit-Roof Replacement.
The Building Code Behind The Work
Washington adopted the 2021 code editions, including the 2021 International Building Code, on March 15, 2024.
Seattle enforces them through the Seattle Building Code, and work that touches the structure triggers added review.
Energy Code At Replacement
Seattle sits in climate zone 4C, where the commercial energy code requires at least R-38 insulation above the deck on a low-slope roof.
The requirement applies once a re-roof exposes the deck. We price that in up front, so the number you approve is the number you pay.
Picking the right roof system
Which Roof System Fits Your Seattle Building?
There is no single roofing system that works best for every Seattle building. The right choice depends on how the property is used, your budget, and how long you plan to own it. We install and maintain low-slope roofing systems built to perform in Seattle’s wet climate.
| System | Where It Fits | Seattle Note |
|---|---|---|
| TPO | Offices, retail, and warehouses | Welds into watertight seams and reflects summer heat |
| PVC | Restaurants and buildings with grease or chemical exposure | Strong welded seams and chemical resistance; Versico and Duro-Last authorized |
| EPDM | Large, simple fields on a tighter budget | Durable rubber membrane that sheds cool-season damp |
| Roof coating and restoration | Sound older roofs not ready for tear-off | Restores watertightness and adds service life without full replacement |
| Metal | Steep-slope sections and retrofits | A membrane retrofit over metal is often possible with no tear-off |
We are authorized with GAF (TPO & PVC), Versico (TPO & PVC), Duro-Last (PVC), and GE Enduris. We will walk you through the trade-offs before you commit to any roofing system.
Materials and systems for long-term commercial performance
Commercial Roofing Systems We Install
As a commercial flat roofing company in Seattle, we install proven systems for flat, low-slope, and select steep-slope or walkable roof areas when your building requires them. Each system is selected based on performance goals, building use, and long-term maintenance planning.
Here are the commercial roofing systems we work with:
Commercial PVC Roofing
Durable single-ply membrane with excellent chemical resistance and long-term waterproofing.
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Commercial Roof Coating
Fluid-applied systems that restore aging roofs and extend service life.
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13+ years of proven commercial roofing experience
Meet Your Seattle Roofing Team
Meet the team responsible for delivering dependable workmanship and consistent project performance.
Ivan Prokopets
Owner & CEO
Rita Prokopets
Chief Operating Officer
Washington Weather Shield Team
What the process looks like
Our Process For Seattle Commercial Roofing
Our commercial flat roofing company in Seattle follows a predictable process that keeps decisions simple and progress visible. This applies whether you need a commercial flat roof repair or a complete commercial flat roof replacement. 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, 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.
Cost-effective performance built for long-term reliability
Why Work With Washington Weather Shield in Seattle
Certification Supporting Your Warranty
Our GAF GoldElite™ certification allows us to offer strong manufacturer-backed warranties on qualifying commercial roofing systems. Depending on the system, coverage may extend beyond 20 years.
Built Around Your Tenants
Our Tenant-First Install Program helps stores, clinics, offices, and other occupied buildings remain open during roof work. We follow agreed quiet hours, clean the site daily, and notify tenants before each phase begins.
Responsive When Leaks Happen
Roofs we install are supported by our 24-hour leak response. If a covered roof develops a leak, our team returns quickly to inspect the issue and complete the required repair at no additional cost. We have had zero emergency callbacks this year.
Support Across Your Entire Portfolio
Portfolio Care helps owners and property managers plan for every roof they oversee. The program includes free roof audits, three-year capital planning, and priority scheduling across multiple properties.
Reviews
Client Testimonials
Property managers, owners, and contractors rely on clear communication and consistent performance. Here’s what Seattle businesses have to say about working with our commercial roofers.
5.0 ★★★★★
Google · 40 reviews
01/ 15
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
Customers love what we do
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.
Commercial Roofing Services in Seattle FAQs
General FAQs
What is the best commercial roofing for Seattle weather?
There is no single best system for the Seattle climate. We recommend the use of TPO or PVC, as they are quality and long-lasting.
- Reflective single-ply like TPO and PVC performs well on the flat roofs common here.
- PVC also stands up to grease and chemical exhaust.
The right pick depends on your building and how long you expect it to perform at 100%.
How is commercial roofing installed on Seattle buildings?
Commercial roofing installation always begins with an inspection. We prepare the roof deck to ensure it’s solid and dry.
Insulation is installed as needed to improve energy performance and create proper drainage slope.
A waterproof membrane such as TPO, PVC, or EPDM is then installed using heat-welded seams, adhesives, or mechanical fasteners depending on the system design.
Final steps include detailing penetrations and flashing, reinforcing seams, and completing a documented quality inspection to confirm the roof is fully sealed and ready for long-term performance.
How long does a commercial roof last in the Seattle area?
A properly installed and maintained commercial roof can often last 20 years or longer. The exact lifespan depends on:
- The roofing material
- Installation quality
- Drainage
- Foot traffic
- How quickly small issues are repaired
- Regular maintenance and repairs
Seattle’s frequent rain makes drainage especially important. Clogged drains and standing water can shorten the life of an otherwise sound roof.
Regular inspections, seam repairs, and drain cleaning help the system reach its expected lifespan.
When an older roof is still structurally sound, a restoration coating may extend its service life and delay a full replacement.
What is the most common type of commercial roof in Seattle?
Low-slope roofing is the most common type found on commercial buildings in Seattle. It is widely used on warehouses, offices, retail properties, clinics, and mixed-use buildings because it works well across large roof areas and supports controlled drainage.
TPO, PVC, and EPDM are common materials used on these low-slope roofs. TPO is a practical option for many general commercial properties. PVC is often selected for restaurants and buildings exposed to grease or chemicals. EPDM is known for its flexibility and long service history.
The right roofing system depends on the building’s use, existing roof structure, drainage, insulation needs, budget, and warranty goals. In Seattle, proper slope and drainage are especially important because the roof must handle frequent and prolonged rainfall.
Pricing & Contracts
What affects the price of commercial roofing in Seattle?
Commercial roofing cost depends on several factors, like:
- Roof size (total square footage) and building configuration
- Commercial roof repair vs complete replacement
- Manufacturer of the flat roof system
- Type of roof system used
- Insulation needs
- Drainage improvements
- Roof complexity
- Site access and staging requirements
- Occupancy considerations
- Warranty level and manufacturer system requirements
- Deck repairs (if found and needed)
For the most accurate pricing, Washington Weather Shield recommends scheduling a roof inspection so you can compare repair, restoration, and replacement options.
Do you offer written estimates and detailed scopes of work?
Yes. Washington Weather Shield provides written estimates and detailed scopes of work for commercial flat roofing projects. Your proposal outlines system recommendations, scope, and warranty coverage 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, contracts are signed before work begins. Our standard payment schedule is 50% upfront to order materials and secure installation dates, with the remaining 50% due upon completion. For larger commercial flat roof replacement projects, progress payments may be requested based on size and timeline.
Expertise & Credentials
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 flat and low-slope 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 you choose a commercial roofing contractor in Seattle?
Start by choosing a contractor with direct experience in flat and low-slope commercial roofing. Commercial projects require different materials, equipment, safety procedures, and scheduling than residential work.
Before signing a contract, ask for:
- Manufacturer certifications that support the proposed warranty
- A written, itemized scope showing materials, labor, and exclusions
- A clear plan for protecting tenants, customers, and daily operations
- Confirmation of who will handle permits and inspections
- Written details about workmanship and manufacturer warranties
- Photos, reports, and updates throughout the project
Price matters, but the lowest cost proposal is not always the best value. A dependable commercial roofing contractor should clearly document the roof’s condition, explain why the recommended work is needed, communicate throughout the project, and follow the agreed schedule.
A closer look at our work across Greater Seattle
Recent Commercial & Industrial Roofing Projects
We’ve completed commercial and industrial roofing projects across the Puget Sound from warehouses and manufacturing facilities to retail and distribution centers. Here’s a look at some recent work we’ve completed.
Puyallup, WA
Legend Auto Sales
Tear-Off · Asbestos Abatement
Full roof tear-off with asbestos abatement and complete replacement for an auto dealership.
View project →
Tacoma, WA
Demgy Pacific
TPO Roof Overlay
TPO overlay for a precision manufacturer of high-performance plastics and composite components.
View project →Start with a quick site visit and a clear plan
Work With Washington Weather shield, a Commercial Roofing Company You Can Rely On
Looking for a commercial roofing company in Seattle that runs organized projects and communicates clearly? Schedule a visit and get a detailed assessment of your roof, timeline, and options.
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