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7615 Rainier Rd SE, Olympia, WA 98513
TPO Roofing in Olympia, WA — Commercial Flat Roof Installation & Repair
Thurston County commercial buildings take a beating from this climate — fifty inches of rain a year, moss that moves fast on any surface that stays wet, and freeze-thaw cycles through winter that stress every seam and flashing detail on a flat roof.
Most property owners don’t call us until water is already inside, and that almost always means the problem started months earlier than the damage looks.
United Roofing Solutions has been installing and repairing TPO roofing systems for commercial properties in Olympia since 2009, and we’ve seen firsthand what deferred maintenance costs compared to a proactive inspection or a well-timed replacement. If your flat roof is aging or showing early signs of wear, call us now at (360) 915-9116 for a free commercial roofing assessment.
What Is TPO Roofing?
TPO roofing stands for thermoplastic polyolefin. It is a single-ply membrane system built for flat and low-slope commercial roofs. Large sheets of the membrane are rolled out across the roof surface and joined using a hot-air welding gun, which fuses overlapping edges into a continuous waterproof bond. That heat-welded seam is one of the system’s defining strengths. Unlike adhesive-based systems that soften, peel, or separate under constant moisture exposure, welded seams hold their integrity through years of rain, temperature swings, and foot traffic from maintenance crews.
Business owners regularly ask how TPO compares to the alternatives. EPDM, or rubber roofing, has been around longer and performs reliably, but its black surface absorbs heat rather than reflecting it, which adds to summer cooling costs.
Torch-down roofing uses heat-applied modified bitumen sheets and remains a solid choice for certain applications, particularly where puncture resistance is the priority. TPO sits between the two: more energy-efficient than EPDM, faster to install than torch-down, and now the most widely installed flat roofing system in commercial construction across the United States. There is a reason the market shifted.
Why TPO Works Well in Olympia’s Climate
Olympia averages more than 50 inches of rain per year. That puts it among the wettest commercial markets in Washington west of the Cascades, and it means flat roofs here face conditions that speed up every weakness in an aging membrane. Standing water, moss growth, and the constant expansion and contraction of materials through freeze-thaw cycles put real pressure on seams, drains, and flashing details. Well-maintained systems handle it. Neglected ones don’t.
TPO holds up well in this environment for specific reasons. Heat-welded seams cut out the adhesive failure points that show up in older systems after years of moisture cycling. The white reflective surface resists algae and moss better than gravel-ballasted membranes, which trap organic debris and hold moisture against the roof.
The energy efficiency argument is also real for Thurston County commercial buildings. Warehouses along the I-5 corridor, office buildings near the Capitol Campus, retail properties in Lacey and Tumwater — all see real reductions in summer cooling loads after switching from dark-surface systems to TPO. The membrane holds up through hard freezes too, and through the kind of sustained wet weather that breaks down systems never designed for a Pacific Northwest climate.
Serving Commercial Properties Throughout Thurston County
United Roofing Solutions installs and maintains TPO roofing systems across the full Thurston County commercial market. Olympia, Lacey, Tumwater, and Yelm. Our crews work regularly on warehouses along Marvin Road in Lacey, commercial properties near Hawks Prairie, office buildings throughout central Olympia, and everything in between. For most commercial jobs in Thurston County, we can have a crew on-site for an initial assessment within one to two business days.
If you searched for a TPO roofer nearby and landed here, the answer to the question you’re probably asking is almost certainly yes. We cover your area. Thurston County is our home market. We have been working commercial roofs here since 2009, and we know the building stock, the drainage patterns that show up repeatedly in certain corridors, and the permit requirements for commercial work in each jurisdiction. Call (360) 915-9116 and we will confirm your location and get you on the schedule. You can also browse our service area to see the full list of cities and communities we cover across the South Sound.
Ready for a free commercial roofing assessment?
Call (360) 915-9116 or book your estimate online.
Our TPO Roofing Installation Process
Most commercial property owners have never watched a TPO installation from start to finish. Here is what the process looks like when United Roofing Solutions handles your project.
Free on-site assessment. We inspect the existing roof — membrane condition, seam integrity, drainage, flashing details, deck condition where accessible. This gives us an accurate scope before we write anything down.
Written estimate and scope. You receive a written quote covering materials, labor, timeline, and any underlying issues that need to be addressed before the new membrane goes down. No verbal ballparks.
Material selection and scheduling. We confirm membrane thickness, attachment method, and insulation requirements. We schedule around your operations where possible.
Installation. The existing surface is prepared, insulation is laid if specified, and the TPO membrane is rolled out and heat-welded across the roof field and all detail areas — drains, curbs, edges, and penetrations.
Final inspection and walkthrough. Every seam is checked. Flashing transitions are reviewed, drains are confirmed clear, and we walk the completed roof with you before we leave the site.
Most commercial TPO installations in Thurston County are completed in one to three days depending on roof size and complexity. We provide written completion documentation and warranty paperwork at the close of every job. No loose ends.
Call Us Anytime: (360) 915-9116
Why Thurston County Businesses Choose United Roofing Solutions
There are roofing contractors in the South Sound market who will quote a commercial TPO job. Fewer have been doing it continuously in this specific market since 2009. Derrick and Jenn Presley founded United Roofing Solutions here in Olympia, and Derrick stays directly involved in the field work. That matters. The person who quoted your job understands what the crew will actually find when they get on the roof, because he has been on hundreds of roofs exactly like it.
United Roofing Solutions holds Washington State contractor license UNITERS904BM — you can verify our license directly through the Washington L&I contractor database.
We carry the licensing, bonding, and insurance required for commercial work throughout Thurston County. Our 70+ Google reviews reflect a 4.6-star rating built over 15 years of work across the South Sound. We have earned the Best of South Sound recognition multiple years running and received the BIAW Excellence in Remodeling award. That recognition comes from the work itself.
For TPO inspections, membrane repairs, or full roof replacements, reach us at (360) 915-9116 or at our office at 7615 Rainier Rd SE, Olympia, WA 98513. Monday through Friday, 8:00 AM to 4:30 PM. For commercial roof repair needs across all flat roofing systems, visit our commercial roof repair page.
Call Us Anytime: (360) 915-9116
TPO ROOFING FAQ'S - ANSWERS FROM AN OLYMPIA TPO ROOFING COMPANY
How long does a TPO roof last in Olympia’s climate?
A properly installed TPO roof lasts 20 to 30 years in Olympia’s climate with routine maintenance. United Roofing Solutions recommends annual inspections for commercial properties in Thurston County. Wet winters here wear down seams and flashing details faster than most property owners expect, and catching small issues early is the difference between a minor repair and a full replacement. Membrane thickness matters too. A 60-mil or 80-mil system will outlast a 45-mil system in high-traffic or high-exposure applications, and the right choice for your building is something we cover during your free estimate.
How does TPO compare to EPDM rubber roofing?
TPO and EPDM are both single-ply flat roofing membranes, but they perform differently where it counts. TPO’s white reflective surface reduces summer cooling loads. EPDM is typically black and absorbs heat, which adds to energy costs during warmer months. TPO seams are heat-welded, which creates a stronger bond than the adhesive-taped seams common in EPDM installations. For commercial buildings in Olympia where energy efficiency and long-term seam integrity matter, United Roofing Solutions generally recommends TPO for new installations, though we install both systems and can walk you through the tradeoffs on your specific building.
How does TPO compare to torch-down roofing?
Both are strong commercial roofing systems, and United Roofing Solutions installs both. Torch-down uses heat-applied modified bitumen, a heavier multi-layer system with excellent puncture resistance that has been a proven choice for Northwest commercial buildings for decades. TPO is a single-ply membrane that installs faster, reflects heat instead of absorbing it, and typically carries longer manufacturer warranties. The right system depends on the building, the existing roof condition, and how the roof is used day to day. We cover both options during your free on-site assessment so you can make a clear decision before any work begins.
How much does TPO roofing cost in Olympia?
United Roofing Solutions provides free on-site estimates for all commercial TPO roofing projects in Olympia and throughout Thurston County, and we will not quote a number without seeing the building first. TPO installation costs depend on roof size, membrane thickness, attachment method, whether the existing roof can be overlaid or requires full tear-off, insulation requirements, and the number and complexity of penetrations like HVAC curbs, drains, and vents. Two buildings with identical square footage can price out very differently. Call (360) 915-9116 to schedule your free assessment and we will give you a written estimate based on your actual roof.
Do you install TPO roofing in Lacey, Tumwater, and surrounding areas?
Yes. United Roofing Solutions installs and maintains TPO roofing systems throughout Thurston County, including Olympia, Lacey, Tumwater, and Yelm. Thurston County is our primary commercial market and has been since we opened in 2009. If you are unsure whether your property falls within our service area, call (360) 915-9116 and we will confirm immediately. For most locations in the county, the answer is a straightforward yes.
What’s involved in a TPO roof inspection or repair?
A TPO roof inspection from United Roofing Solutions covers seam integrity, flashing condition at all roof penetrations and edges, drain function and debris clearance, membrane surface wear, and any areas of standing water or soft decking below the membrane. Most TPO repairs, including seam re-welding, flashing replacement, and localized membrane patching, are completed the same day or the following day once the scope is confirmed. For commercial properties with active leaks or storm damage, call (360) 915-9116 directly. Our commercial roof repair services cover all flat roofing systems across Thurston County.
Is TPO roofing covered by a manufacturer warranty?
Yes. Most TPO systems installed by qualified contractors carry a manufacturer-backed material warranty, typically ranging from 10 to 30 years depending on membrane thickness and the product line selected. United Roofing Solutions installs warranted TPO systems and provides full warranty documentation at project completion. Coverage terms depend on the membrane and attachment method specified for your building. We go over warranty options during your free estimate so you know exactly what protection comes with the installation before any work begins.
Ready to protect your commercial roof?
United Roofing Solutions handles TPO installation, inspection, and repair for commercial properties across Thurston County. If you manage or own a commercial building in Olympia, Lacey, Tumwater, or Yelm and the roof is something you have been putting off thinking about, now is a better time to look at it than after the next rainy season reminds you. Call United Roofing Solutions at (360) 915-9116 — Derrick and the crew have been working commercial roofs in this county since 2009, and a free on-site assessment costs you nothing but an hour of your time.
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(360) 915-9116
(360) 915-9116
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