Call Now (425) 777-5031
Home › Services › Flat / Low slope Roofing
Roofing Types

Flat &
Low slope Roofing

Modern flat roofing systems engineered for maximum protection on low slope applications. TPO, EPDM, and modified bitumen installed by experienced crews.

Get a Free Estimate Call (425) 777-5031

Request a Free Estimate

We'll get back to you within one business day.

Thank you for your submission

We'll reach out to you within one business hour.

Skip the line and book your estimate now

(425) 777-5031
Licensed, bonded & insured
TPO, PVC & Torch-Down

Low-Slope Roofs That Stay Watertight

Every seam welded and checked, drainage corrected so water actually leaves the roof, and each penetration detailed where low-slope leaks really start.

5.0 Rating Google Reviews
24+ Cities King & Snohomish County
Licensed & Bonded Covered on every job

Flat Roofing

The Right System for Every Low slope Application

Flat and low slope roofing requires a completely different approach than pitched roofing. Water doesn't shed by gravity alone, it has to drain, and the system has to be completely watertight from day one. One mistake means a leak.

Vantek installs the three most proven flat roofing systems: TPO (Thermoplastic Polyolefin) for energy efficiency and clean modern aesthetics; EPDM (synthetic rubber) for durability and long term value; and modified bitumen for multi-layer redundancy on high-traffic roofs.

Get My Free Estimate
Low-slope TPO membrane roof on a modern Greater Seattle home, seen from the driveway
BeforeThe the same roof before, cracked and blistered bitumen with patched seams and ponding water — representative example
AfterThe same roof after: a new TPO membrane flat roof — representative example

Before & After

See the difference

Drag the handle to see the same roof before and after. Every flat & low slope roofing job gets the same tear-off, the same materials and the same walkthrough before we collect a dollar.

  • 20–30 year membrane life. EPDM has a proven track record in the Pacific Northwest; drainage design decides the rest.
  • TPO Systems. Heat-welded seams, reflective white surface, excellent energy performance.
  • EPDM Systems. Durable synthetic rubber membrane with a 20 to 30 year track record.
  • Proper Drainage Design. We assess and design slope before any membrane goes down. No ponding water.
Get My Free Estimate
Completed low-slope roof with parapet coping on a modern Eastside home, seen from the driveway — representative example

Where We Work

Flat & Low slope Roofing Across Greater Seattle

We work across King and Snohomish County, from Seattle and the Eastside out to the north and south ends. If your city is not listed, ask — we very likely cover it.

SeattleBellevueKirklandRedmondRentonBothellIssaquahKent

Explore Related Roofing Services

Residential Reroof→Roof Repair→Asphalt Shingles→

FAQ

Flat Roofing Questions

Cost, systems, drainage, and lifespan explained. Flat roofing has a lot of variables, so call us if your situation is specific.

How much does a flat roof cost in the Bellevue area? +
Flat and low-slope roofing in King County typically ranges from $8,000 to $20,000 depending on the square footage, the membrane system selected, and the extent of any substrate repairs needed. TPO and modified bitumen are the most common systems and generally fall in the $8 to $14 per square foot range installed. Premium systems like PVC cost more but offer superior UV resistance and weld strength.
What flat roofing systems do you install? +
We install TPO membrane, modified bitumen, and PVC roofing systems. TPO is the most commonly specified residential flat roofing material in this region due to its balance of cost, durability, and UV resistance. Modified bitumen is a proven system with excellent cold-weather performance. We will recommend the best system for your building type, drainage conditions, and long-term goals.
How long does a flat roof last? +
A properly installed TPO or PVC flat roof will last 20 to 30 years. Modified bitumen typically runs 15 to 20 years. Lifespan is heavily dependent on installation quality, drainage design, and whether the roof receives regular maintenance. Standing water and blocked drains are the most common cause of premature membrane failure.
How do you handle drainage on flat roofs? +
Proper drainage is the most critical element of any flat roof system. We assess existing drain locations, slope, and drainage paths during every estimate. Where drainage is inadequate we can add drains, reposition existing ones, or build in tapering with insulation board to direct water toward the drains efficiently. A flat roof that drains properly will outlast one that does not by a significant margin.
Can a flat roof be repaired rather than fully replaced? +
Flat roof membranes can often be repaired if the damage is localized and the rest of the membrane is in good condition. We will always give you an honest assessment of whether a repair or replacement makes more economic sense. A roof that is approaching the end of its useful life is rarely worth extensive repairs when a full replacement will provide decades of reliable protection.
Full FAQ
Vantek Roofing project home in Greater Seattle at dusk
Ready When You Are

Let's get your
flat & low slope roofing sorted

Free in-person estimate, real measurements, and a written price that does not move after you sign. No pressure, no obligation.

Get a Free Estimate Call (425) 777-5031