Dec Tec Roofing Company in Seattle
Washington Weather Shield is the Dec-Tec roofing company in Seattle that property owners and managers turn to for watertight, walkable roof surfaces on commercial properties.
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Roof replacements that keep your building protected
Our commercial roofing Seattle service delivers quiet, organized installs with clear communication and predictable timelines.
Why Building Owners Choose Our Commercial Dec-Tec Roofing Team
Choosing Washington Weather Shield for Dec-Tec means working with a team that understands the system and knows how to install waterproof, slip-resistant surfaces built for long-term durability. You can expect clear communication, dependable scheduling, and workmanship focused on lasting protection. Here’s what sets our work apart.
Leak-Free Performance Pledge
Every commercial Dec-Tec roofing install includes documented quality checks at each phase and responsive support for any workmanship-related leak.
On-Time, On-Budget Scorecard
Transparent milestones, change orders, and progress photos. We start when promised and finish as bid.
Tenant-First Install Program
Quiet hours as needed. We help reduce disruption for tenants, staff, and daily operations.
Clean Site Guarantee
Clean jobsite practices, controlled access points, debris control, and a thorough final cleanup. We leave your property the way you would want it left.
Portfolio Care for PMs & Owners
Free roof audits, 3-year capital planning, and priority scheduling across your properties.
Everything your roof project needs in one place
Our commercial roofing service in Seattle covers everything from assessment to final cleanup.
Here’s what’s included in every roofing project.
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.
Our Dec Tec Roofing Membrane Services in Greater Seattle
We support the full lifecycle of Dec-Tec roofing membrane systems, including new installation, replacement, repair, and resurfacing. Our team provides clear project scopes, sets expectations early, and installs durable, watertight surfaces designed to perform in Pacific Northwest conditions.
New Dec-Tec Membrane Installation
Purpose-built waterproof surfaces for decks, balconies, rooftop patios, walkways, and outdoor living spaces. We coordinate with contractors, property owners, and design teams to ensure proper substrate preparation, drainage, flashing, and detailing for long-term performance.
Dec-Tec Roofing Membrane Replacement
When an existing membrane has reached the end of its service life, we remove the failing surface, inspect the underlying substrate, address any deterioration, and install a new Dec-Tec roofing membrane designed to restore waterproof protection and extend the life of the structure below.
Dec-Tec Waterproofing for Decks, Balconies, and Occupied Spaces
Dec-Tec is commonly used to create durable, walkable waterproof surfaces over occupied areas where moisture protection is critical. We evaluate the structure, drainage conditions, and intended use of the space to ensure the system is appropriate for the project and properly integrated into the building envelope.
Meet Your Greater Seattle Commercial Roofing Team
Meet the team behind the planning, communication, and craftsmanship that keep commercial and industrial roofing projects running smoothly.
Ivan Prokopets
Rita Prokopets
Washington Weather Shield Team
Related Commercial Roofing Systems
Washington Weather Shield installs a variety of commercial roofing systems for flat, low-slope, steep-slope, and specialty waterproofing applications.
While Dec-Tec is an excellent solution for decks, balconies, and walkable surfaces, we can help you evaluate other roofing systems based on your building’s design, roof slope, traffic levels, maintenance goals, waterproofing needs, and long-term performance expectations.
Commercial TPO roofing
A lightweight, heat-welded single-ply membrane commonly used on flat and low-slope commercial roofs, offering excellent waterproofing performance and energy efficiency.
Commercial PVC roofing
A durable, heat-welded single-ply membrane known for its chemical resistance, fire performance, and long-term durability on flat and low-slope commercial roofs.
Commercial roof coating
Liquid-applied roofing systems designed to restore, waterproof, and extend the service life of qualifying commercial roofs while minimizing disruption and replacement costs.
Commercial metal roofing
A long-lasting, fire-resistant roofing system known for exceptional durability, low maintenance requirements, and strong performance on commercial facilities.
Commercial composition roof
A cost-effective asphalt shingle roofing system commonly used on steep-slope commercial and mixed-use buildings where appearance and affordability are priorities.
Our Commercial Dec-Tec Roofing Process
Our Dec-Tec roofing process keeps every phase clear and predictable, with steady communication, clean job sites, and a schedule that stays on track.
Step 1: Schedule your free Dec-Tec roof evaluation
We visit your property, inspect the existing Dec-Tec roofing membrane (or proposed installation area), evaluate the substrate, flashings, drains, seams, and transitions, and identify any areas of concern. You’ll receive a clear assessment of the system’s condition along with practical recommendations and next steps.
Step 2: Review your plan and proposal
We provide a detailed written proposal outlining the scope of work, Dec-Tec roofing membrane specifications, warranty options, and pricing.
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.
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.
Why Commercial Dec-Tec Roofing Is a Smart Long-Term Investment
Commercial Dec-Tec roofing is valued for its waterproofing capability, clean appearance, and long-term performance on low-slope and walkable roof surfaces. The material matters, but the installation details matter just as much. Proper surface preparation, heat-welded seams, drainage planning, and careful detailing around penetrations, edges, and transitions all affect how well the system performs over time.
What Clients Say About Our Dec Tec Roofing Work
See what property managers, owners, and contractors say about working with our commercial roofing team. Real feedback on communication, cleanliness, and results that hold up after the project is done.
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 roofing company, they want steady communication and reliable results. See what Seattle businesses say about working with our commercial roofers.
FAQs on Commercial Dec-Tec Roofing
Is Dec-Tec reliable for commercial roofing?
Yes. Dec-Tec is a proven PVC roofing membrane system designed to provide a durable, watertight, and walkable surface. When installed on a properly prepared substrate by an experienced contractor, Dec-Tec performs reliably on commercial decks, balconies, rooftop patios, and other pedestrian traffic areas for many years.
What is Dec-Tec made of?
Dec-Tec is a reinforced PVC (polyvinyl chloride) sheet membrane with a textured, slip-resistant top layer. The seams are heat-welded to form a continuous, watertight surface.
What are the benefits of Dec-Tec?
Dec-Tec combines waterproofing and a finished walking surface in a single system. Benefits include slip resistance, UV stability, low maintenance requirements, attractive color and pattern options, and long-term protection for decks, balconies, and rooftop living spaces.
How long does a Dec-Tec membrane last?
With proper installation and routine maintenance, a Dec-Tec roofing membrane can provide decades of reliable performance. Actual lifespan depends on factors such as foot traffic, weather exposure, drainage, and ongoing maintenance.
Can a general contractor do commercial Dec-Tec roofing in Washington state?
Commercial Dec-Tec roofing membrane systems should be installed by contractors with experience in waterproofing and PVC membrane installation. Proper installation is critical for long-term performance, watertight protection, and warranty eligibility. Before hiring a contractor, verify their licensing, insurance, experience, and familiarity with manufacturer installation requirements.
What affects the price of a Dec Tec roofing project?
Pricing depends on the size and configuration of the deck or roof area, the condition of the existing substrate, access requirements, drainage details, penetrations, and the Dec-Tec roofing membrane color and pattern selected.
Do you offer written estimates and detailed scopes of work?
Yes. Every proposal includes a written estimate, detailed scope of work, system specifications, project schedule, and pricing. We believe clear documentation helps eliminate surprises and keeps projects running smoothly.
How do contracts and payment schedules work for commercial roofing projects?
We use written contracts that clearly define the scope of work, project pricing, payment schedule, and change-order procedures. Our goal is complete transparency throughout the project.
Are your commercial roofing contractors licensed and certified?
Yes. Washington Weather Shield is fully licensed and insured, and our team is trained to install commercial roofing systems in accordance with manufacturer specifications. We hold certifications with leading manufacturers including GAF, Versico, Duro-Last, and GE Enduris, and we are proud to be a GAF GoldElite™ Commercial Contractor.
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. We install Dec-Tec and other commercial systems through manufacturer-backed programs. 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 the Puget Sound and Greater Seattle areas.
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
Connect With a Seattle Dec Tec Roofing Company
Ready to talk through your project? Share a few details about your building and what you are trying to solve, and we will follow up to schedule a free on-site evaluation across the Greater Seattle and Puget Sound area.