Licensed & Insured
Flat Roofing in Walnut Creek, CA
We've installed and repaired flat roofs across Contra Costa County since 2008. Licensed (C-39 192109), GAF-certified, and on-site start-to-finish — no subcontractors.
Licensed Flat Roof Specialists
Walnut Creek's Flat Roofing Experts Since 2008
We've installed and repaired flat roofs across Walnut Creek and Contra Costa County for 18 years. License C-39 192109. We use TPO, EPDM, and modified bitumen from manufacturers like Firestone and GAF — no shortcuts.
Licensed & insured in California
C-39 192109, verified on CSLB
18 years of flat roofing in Walnut Creek since 2008
Certified installers for Firestone TPO and GAF EPDM systems
4.9-star rated
200+ Walnut Creek homeowners and commercial clients served
Flat roofs on Contra Costa County homes demand materials that handle standing water, not just rain runoff. We've installed and repaired TPO, EPDM, and modified bitumen systems across Walnut Creek since 2008 — license C-39 192109, fully insured, 4.9 stars across 108+ reviews. Call (925) 503-1377 for a same-day inspection.
What’s Included in Our Flat Roof Service
When you book a flat roof job with us, here’s exactly what’s included. We don’t cut corners—every material, every step is laid out below.
Our Flat Roof Process
We've been installing flat roofs across Contra Costa County since 2008. Here's the step-by-step process we use for every job, from your first call to final sign-off.
Free Inspection & Estimate
We inspect your existing flat roof, measure the area, and discuss material options like TPO, EPDM, or modified bitumen. You'll get a written estimate with no pressure. (License C-39 192109.)
Surface Preparation
We remove old roofing, repair any damaged decking, and ensure a clean, dry substrate. This step is critical for long-term performance.
Install Underlayment & Membrane
We apply a high-quality underlayment, then install the chosen membrane (GAF EverGuard or similar). All seams are hot-air welded or sealed per manufacturer specs.
Flashing & Details
We flash all penetrations, edges, and drains with heavy-duty metal flashing and sealant. Proper flashing prevents leaks at the most vulnerable points.
Final Inspection & Warranty
We walk the roof together, demonstrate drainage, and answer any questions. You receive our 10-year workmanship warranty plus manufacturer warranty.
DIY vs. Discount vs. Walnut Creek Roofers: Flat Roof Reality Check
Flat roofing is unforgiving. One missed seam invites standing water; one wrong membrane choice fails inside five years. Here's how the options stack up.
| Factor | DIY | Cheap Competitor | Walnut Creek Roofers |
|---|---|---|---|
| Materials | Big-box EPDM rolls — no warranty | Unknown brand, no docs | GAF, CertainTeed, Malarkey — certified install |
| Crew | You | Subcontracted day labor | Our own crew, start-to-finish |
| License | None | Often unlicensed | C-39 192109 — CSLB verified |
| Warranty | None | 1 year, if anything | 10-yr workmanship + manufacturer coverage |
| Insurance | You absorb all risk | Often unverified | Full GL + workers' comp on every job |
| Experience | First time | Unknown | 18 years in Contra Costa County since 2008 |
Danville TPO Flat Roof: 2024 Full Replacement
A Danville homeowner had a 22-square TPO flat roof failing at every seam. We replaced it start-to-finish — no subs, no shortcuts.
Location: Danville, CA — Blackhawk neighborhood Year: 2024 Scope: 22-square TPO membrane full replacement
The original single-ply membrane had been patched three times in five years. By the time the owner called us, standing water was pooling at two low spots and daylight was visible through a failed seam near the parapet.
We removed the existing membrane and insulation down to the deck, found two soft spots in the plywood, and replaced those sheets before proceeding. We installed 2-inch polyiso insulation board to bring the R-value up to current code, then heat-welded a 60-mil TPO membrane with reinforced seams at every penetration and the full parapet perimeter.
Drainage: we re-sloped both low spots using tapered insulation rather than cutting into the deck. The two interior drains were relined with new clamping rings.
License C-39 192109 on file. Crew on-site four consecutive days, site clean each evening.
Result: Zero callbacks in 12 months. Owner received a 10-year workmanship warranty and qualifies for the manufacturer's 20-year membrane warranty through our certified installer status.
*"They found rot we didn't know about and fixed it the same day. No upsell pressure — just showed us the boards and fixed them."* — Danville homeowner, 2024
Frequently Asked Questions About Flat Roofing
We’ve handled flat roofs across Walnut Creek, Concord, and Lafayette for 18 years. Here are answers to the questions we hear most from homeowners.
What flat roofing materials do you install?
We install TPO, PVC, modified bitumen, and built-up roofs (BUR). For clients who want a cool roof that reflects heat, we recommend GAF’s EverGuard TPO or CertainTeed’s Flintlastic SA. Every material is selected for durability under the Bay Area sun and marine layer.
How long does a flat roof replacement take?
Most residential flat roofs (1,500–2,500 sq ft) take 3–5 days from tear-off to final inspection. Complex multi-layer roofs or ones with extensive decking repairs may take a week. We give you a firm timeline before we start, and our crew stays on-site until it’s done.
Do you offer warranties on flat roofs?
Yes. We provide a 10-year workmanship warranty on all full replacements. Plus, as a GAF Certified Contractor, you qualify for manufacturer warranties up to 25 years on materials. For repairs, we back the work with a 3-year warranty.
Can you repair a leaking flat roof instead of replacing it?
Often, yes — if the leak is isolated and the membrane is in good condition. We’ll patch the area with the same material and reinforce the flashing. But if the roof has multiple leaks, ponding water, or blisters, replacement is usually more cost-effective long-term. We’ll tell you straight.
How do I know if my flat roof needs replacement?
Look for pooling water that lasts more than 48 hours, cracked or bubbled membrane, or granules in the gutters. If your interior ceiling shows water stains or the roof is over 20 years old, it’s time for a free inspection. We’ll check the deck, insulation, and flashings — no obligation.
Do you help with insurance claims for flat roof damage?
Absolutely. At no extra charge, we document every inspection with photos, measurements, and a detailed report you can submit to your insurer. We’ve guided dozens of Contra Costa homeowners through storm and hail claims. We’re here until your claim is settled.
What does a flat roof replacement cost in Contra Costa County?
Cost varies by size, material, and access. Typical residential flat roofs run $7–$12 per square foot installed. For a 1,800 sq ft TPO roof, expect $12,000–$18,000. We’ll give you a precise quote after measuring and inspecting — no surprises.
Are you licensed and insured for flat roofing work?
Yes. We’re fully licensed (C-39 192109) with the California CSLB, carry general liability and workers’ comp, and have been family-owned since 2008. Every crew lead is a WCR employee, not a subcontractor. You can verify our license on the CSLB site.
Licensed & Insured
Walnut Creek's Trusted Flat Roofing Specialists Since 2008
We're licensed (C-39 192109), fully insured, and have installed flat roofing systems across Walnut Creek for 18 years. Every job backed by warranty.
Pricing Guidance
Final pricing depends on roof size, slope, access, materials, and condition of underlying decking. Ranges below are typical for a single-family home.
| Service | Typical Range | Unit |
|---|---|---|
| Roof Repair | $450–$2,800 | per repair |
| Roof Replacement | $9,000–$28,000 | per single-family home |
| Roof Inspection | $0–$450 | per inspection (often free with replacement) |
| Shingle Roofing | $8,500–$24,000 | per single-family home |
| Metal Roofing | $14,000–$42,000 | per single-family home |
| Gutter Installation | $850–$3,400 | per home (includes downspouts) |
| Commercial Roof Repair | $1,200–$12,000 | per repair |
| Flat Roofing | $6–$14 | per square foot installed |
| TPO Roofing | $7–$15 | per square foot installed |
| Commercial Roof Maintenance | $0–$2 | per square foot per year |
| Roof Coating | $3–$8 | per square foot installed |
Flat Roof Pricing
What Does Flat Roofing Cost in Walnut Creek?
We give every Walnut Creek homeowner and property manager a written estimate before work begins. Flat roof pricing depends on square footage, membrane type, and existing deck condition — here's what drives your number.
TPO membrane installation
$4.50–$7.00/sq ft — our most-requested option for commercial and residential flat roofs in Walnut Creek
EPDM rubber roofing
$5.00–$8.50/sq ft — longer lifespan, ideal for low-slope decks exposed to Bay Area temperature swings
Modified bitumen (torch-down)
$3.50–$6.00/sq ft — cost-effective for smaller flat sections on residential additions
Tear-off and deck repair
$1.50–$3.00/sq ft additional — required when the existing substrate shows rot or delamination
Ranges reflect Walnut Creek and Contra Costa County market rates as of 2025. Final price confirmed in your written estimate. License C-39 192109. We carry full liability and workers' comp insurance.
What Our Customers Say
4.8 stars · 108+ verified reviews
Walnut Creek Roofers replaced our 22-year-old shingle roof in two days flat. The crew was respectful of our landscaping, cleaned up every nail, and the GAF system they installed looks incredible. The price was fair and they filed the permit without us having to chase it. Will absolutely call them again.
After a winter storm tore off two sections of our flashing, Walnut Creek Roofers was on-site within 24 hours. They tarped the exposed decking that same afternoon, walked us through the insurance claim process, and had the permanent repair done by end of week. Honest estimates, no upsell pressure.
I called for a pre-purchase inspection on a home in Orinda. The inspector found two soft spots the listing agent hadn't mentioned, documented everything with photos, and gave me a written repair estimate I could use in negotiations. Saved me thousands.
Get Your Free Flat Roof Inspection in Walnut Creek
We've been waterproofing flat roofs across Contra Costa County since 2008. Call (925) 503-1377 or request an estimate — we'll assess your membrane, drains, and flashing at no charge.
Walnut Creek, CA 94596 · info@walnutcreekroofers.com · License C-39 192109 · Mon–Sat