Commercial Flat Roofing Seattle Installation & Repair

Atlas Roofing’s team of flat roof contractors provides installation and repair services in Seattle, WA, for commercial buildings, multi-unit properties, and HOA-managed structures. We work on TPO, PVC, torch-down, and modified bitumen roofs. We also apply elastomeric and silicone coatings. We build systems that drain right, hold up to weather, and protect what’s underneath.

Why do commercial property owners trust us?

Licensed and insured contractors

Flexible financing options

Trusted across Google, BBB, Yelp, and Thumbtack

Local experience in Seattle and the surrounding areas

Full range of roofing materials and systems

Free estimates with no obligation

 

Why Flat Roofs Are Ideal for Commercial Roofing

Flat systems are affordable and easy to maintain, making them ideal for commercial buildings with simple architectural designs. While they may not offer decorative appeal like sloped structures, flat systems provide functional space for HVAC units, solar panels, and even accessible decks.

Atlas Roofing installs and repairs these systems with the expertise needed to avoid drainage and moisture problems that shorten lifespan. We help protect your building investment with proven methods, durable materials, and clean project execution from start to finish.

Commercial flat roofing contractors working on Seattle building

Seattle, WA Top Commercial Roofing Company

Atlas Roofing is a leading family-owned, licensed, bonded, and insured roofing company that offers professional, affordable roofing installation, repair, and replacement services for commercial facilities in Seattle, WA. We focus on building long-lasting client relationships because our customers are family!

We go above and beyond to provide lasting roofing solutions by pairing expert craftsmanship with high-quality materials. Our team of roofing experts is always sure to treat every property with respect! We balance outstanding roofing services with equally excellent customer service to guarantee all our clients’ satisfaction.

Our Flat Roofing Services

We provide the following full-scope flat roofing Seattle services for commercial buildings, including installation, repair, replacement, maintenance, and roof coatings.

Installation & Replacement

We install each roofing system to match your building’s needs and handle full replacements for aging or damaged assemblies. Our crew manages everything from tear-off to final inspection, with minimal impact on tenants.

Repairs & Emergency Leak Response

Whether it’s ponding, punctures, or active leaks, we provide fast, effective repairs. Our emergency team is available 24/7 to stop water intrusion and protect your property.

We also offer scheduled flat roof maintenance near you to help catch issues early and extend system life.

Rooftop Decks & Low-Slope Solutions

We waterproof rooftop decks for walkable use and correct slope issues that lead to drainage problems. Every roof is reinforced to support load and function.

Roof Coatings & Life Extension

We apply silicone and elastomeric coatings to an aging roof system to extend service life and improve energy performance. They’re ideal for commercial buildings not ready for full replacement.

We Work With Major Types of Flat Roofs

Atlas Roofing installs and repairs all common flat roofing systems used on commercial and multi-unit properties. Our team is trained in best practices for each material and installation method to meet code, warranty, and long-term performance standards.

TPO (Thermoplastic Polyolefin) – Energy-efficient, single-ply membrane ideal for large commercial surfaces.

Torch-Down Roofing – A modified bitumen system applied with heat for strong adhesion on low-slope roofs.

PVC (Polyvinyl Chloride) – A heat-welded membrane ideal for roofs needing chemical and fire resistance.

Cold-Applied Modified Bitumen – A layered, torch-free membrane used where open flame isn’t suitable.

Elastomeric & Silicone Coatings – Liquid-applied roof protection that seals aging systems and extends life.

When Should You Choose Roof Replacement Over Repairs?

Roof replacement makes more sense when the system has widespread damage, recurring leaks, or has reached the end of its service life. Small issues like surface cracks or flashing problems can be repaired, but structural deterioration or poor drainage often require a full rebuild.

A qualified commercial flat roofer will assess whether continued repairs are worth the cost or if replacement is the smarter investment. 

At Atlas Roofing, we understand how flat roofs work and, more importantly, why they fail. We design every system with long-term function in mind and execute each project to the highest standard, whether it’s a new install or a full roof replacement.

 

Get a Free Estimate for Your Flat Roofing Project Today

Atlas Roofing’s team of seasoned roofing contractors has extensive experience and knowledge in roofing systems and techniques. With every project we take on, we are committed to providing high-quality materials and high standards of workmanship at competitive prices.

If you are looking to repair or replace your flat system, Atlas Roofing is here to help! Our commercial roof replacement services are unmatched in quality and cost.

Our Work

FAQs

What is TPO, and why is it used on flat roofs?

TPO is a single-ply membrane used in commercial flat roofing. It’s popular for flat roof systems because it’s reflective, lightweight, and holds up well to UV and heat. TPO works well for large buildings where energy efficiency and durability matter.

Flat roof repair may be needed if you notice bubbling, ponding water, or visible cracks. These issues can lead to leaks or structural problems if ignored. Getting the surface inspected early allows roofers to make targeted repairs before major damage occurs.

PVC roofing is a type of membrane roof that offers great chemical resistance and long-term strength. It’s often used on restaurants or buildings with rooftop equipment. Compared to other flat roof membranes, PVC holds up well under harsh conditions.

Roof replacement is the right choice when repairs no longer hold or the membrane is past its service life. If your commercial roof has widespread damage, persistent leaks, or poor insulation, replacing the entire system can prevent future issues and save long-term costs.

Before flat roof installation, ask roofers about their experience with commercial systems, drainage design, and warranty coverage. A good roofer will explain how they slope the roof, what membrane they use, and how long the job will take.