Architectural shingles
Metal roofing
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Replacement Across Commerce
Roof replacement in Commerce typically runs $8,500 – $16,500 for a full tear-off on a standard 1940s – 60s stucco home, with flat-roof work landing between $9,000 and $18,000 depending on decking condition and parapet repairs. Most Commerce jobs take 3 to 7 working days once materials are on-site. If you’re south of Bandini Boulevard or near the industrial belt off Telegraph Road and your roof is showing its age, call us at (866) 850-2496. We’ll give you a straight answer about what your roof actually needs, not a sales pitch.
We know Commerce’s housing stock because we work on it regularly, the small flat-roofed bungalows in the residential pockets, the older tilt-up warehouses along the I-5 and 605 corridor. The roof problems here aren’t the same as what you’d find in Maywood or Bell, and neither are the fixes. Our Roof Replacement team has seen enough Commerce decks to know what hides under the old tar and gravel.
Why Windmill Roof Repair Is Commerce’s Preferred Roof Replacement Company
Ruben Ochoa built Windmill Roof Repair around a simple idea: a homeowner should see the condition of their roof before anyone asks them to sign anything. In Commerce, where the housing stock is aging and the roof problems aren’t always visible from the curb, that matters even more. We have a strong local reputation among Commerce homeowners, built on standalone inspections that don’t pressure anyone into work they don’t need.
We work across seven shingle and membrane manufacturers, including GAF, CertainTeed, and Owens Corning, so the recommendation you get is matched to your roof, not to a supplier agreement. If your Commerce flat roof is a better candidate for a modified bitumen cap sheet than a shingle product, we’ll tell you that. Repair when you can, replace when you must. That’s the whole approach.
Ruben and the crew respond to Commerce calls quickly, and we schedule roof replacements around the city’s unique mix of residential and industrial work without making you wait weeks for a bid. You’ll get a written line-item quote, a clear explanation of what’s failing and why, and the option to walk through the inspection findings yourself before deciding.
Styles & brands we work with
New Roof Installation in Commerce
New Roof Installation in Commerce usually means one of two situations: the existing roof has reached the end of its service life and a full tear-off is the only honest fix, or a homeowner is planning to stay in the house long enough that a complete new system makes more financial sense than repeated patching. For Commerce’s 1940s – 60s stucco homes, a new flat roof typically runs $9,000 to $18,000 depending on square footage, decking replacement, and whether parapet flashing and scuppers need rebuilding. Steep-slope shingle replacements on the few pitched roofs in town land between $8,500 and $16,500.
The job starts with a full tear-off down to the decking. We don’t overlay new roofing onto failing material, especially on Commerce flat roofs, where decades of recoats and patch layers trap moisture against the wood. We inspect the deck, replace rotted sections in writing before touching anything unexpected, install new underlayment, and build the new system from the substrate up.
Built-up and Membrane Systems
Most Commerce homes originally had built-up tar-and-gravel roofs, and today we typically replace those with modified bitumen or single-ply systems that handle the Inland Basin UV load far better. These systems are lighter than the original gravel ballast, which matters on older framing. We also rebuild the parapet flashing at the same time, since that’s where Commerce roofs actually fail.
Full Tear-Off vs. Recover
On homes with multiple existing layers or visible sponginess, a full tear-off is the only way to know what the decking looks like. We’ll tell you if a recover is an honest option, but in Commerce, where hidden rot at parapet edges is common, most older homes need the deck exposed before we can give a real recommendation.
Reroofing in Commerce
Reroofing in Commerce is what most flat-roof homeowners actually need, a full replacement of the existing roof system rather than a new construction install. On the 1950s tar-and-gravel bungalows south of Bandini Boulevard, the membrane itself is rarely the first thing to fail. The scuppers clog, water backs up behind the fascia, and rot starts in the top plate while the field membrane still looks fine. A reroof on these homes generally runs $9,500 to $17,000, with the final number driven by how much decking and parapet wood has to come out.
We approach every Commerce reroof with the assumption that the deck will have surprises, because it usually does. That’s why our quotes include written allowances for decking and parapet work. If we open the roof and find more rot than expected, you approve the added scope in writing before we proceed. No change orders appear out of nowhere.
Parapet, Scupper, and Flashing Work
A Commerce reroof isn’t complete unless the scuppers drain and the parapet flashing is rebuilt. We replace sealed-over scuppers, reconstruct parapet caps, and install new drip edge and flashing so water leaves the roof the way it was designed to. That’s the difference between a roof that lasts and one that leaks the first December it rains.
Decking and Structural Repair
On a 1950s tar-and-gravel bungalow off South Atlantic Boulevard, our crew pulled the old roof and found the scupper had been sealed over with layers of patch, channeling water behind the fascia and into the top plate. We replaced the decking, installed new GAF underlayment and drip edge, and rebuilt the parapet flashing before laying a modified bitumen cap sheet, then tested the new scupper with a hose before sign-off. That’s how we handle every Commerce reroof.
Trusted Brands We Service in Commerce
Windmill Roof Repair installs and services roofing systems from seven manufacturers, so Commerce homeowners aren’t locked into whatever one contractor happens to stock. On the flat-roof side, we work heavily with GAF and CertainTeed membrane and underlayment products, and for the pitched roofs around Commerce we regularly install Owens Corning shingles. The right material for your roof, not ours. We keep common components for these systems readily available, which keeps turnaround on Commerce replacements moving without long waits for material deliveries.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Commerce Homes
- Clogged or sealed-over scuppers at parapet edges. The first winter storm backs water up against the fascia, and the interior floods even though the membrane itself is intact. We rebuild scuppers and parapet flashing as part of every flat-roof replacement.
- UV-cracked seam tape on aged TPO and modified bitumen. Commerce gets intense inland sun with almost no rain, so the seams bake before the field membrane fails. Water migrates under the surface and pools against the deck, where you can’t see it until the ceiling stains.
- Layered patching that traps moisture against the decking. Decades of recoats and patch jobs on old tar-and-gravel roofs create a sandwich of sealed-in moisture. The rot only appears once the old roof is torn off, which is why our contracts include written decking allowances.
- Aging fascia and top plates on 1940s – 60s stucco homes. The residential pockets south of Bandini Boulevard hold homes where water has been channeled behind fascia boards for years. Reroofing without touching the fascia just hides the problem under a new roof.
Pricing for Roof Replacement in Commerce, CA
A full flat-roof replacement on a typical Commerce home runs $9,000 to $18,000, and a shingle roof replacement on the city’s pitched homes lands between $8,500 and $16,500. What moves the number is decking condition. Homes with rotted top plates, failed fascia, or multiple layers of old roofing cost more because the structural repairs come first. Parapet and scupper rebuilds add $1,200 to $4,000 depending on the linear footage and how much wood has to come out. Every quote we write includes line-item allowances so you see exactly where the money goes before work starts. Call (866) 850-2496 for a free estimate, and you’ll get a written quote, not a phone number and a handshake.
We Also Serve Cities Near Commerce
Our crews work throughout the Gateway Cities region, including Maywood, Bell, Cudahy, and Bell Gardens. If you’re in one of those neighboring communities and need flat-roof or shingle replacement, we bring the same inspection-first approach to every job. See more about our work in Roof Replacement in Commerce and the surrounding area.
Serving Commerce, CA — Our Local Coverage Area
We’re based in the Commerce area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About Roof Replacement in Commerce
Yes. We start every job with a standalone roof inspection, and on Commerce flat roofs we look specifically at scupper function, parapet flashing condition, and whether the membrane has UV-cracked seams. If a recoat is an honest option, we’ll tell you. If the deck is rotted or the scuppers have been sealed over, a recoat just hides the problem. Call (866) 850-2496 to schedule an inspection.
Our Commerce roof replacement quotes include written allowances for decking, fascia, and parapet work. When we open the roof and find more damage than the allowance covers, we stop, show you what we found, and get written approval before proceeding. You never get a surprise change order. That’s how we keep the budget predictable on older Commerce homes.
Modified bitumen systems are the most common replacement choice on Commerce’s low-pitch homes, because they handle the inland UV load well and can be installed without adding heavy gravel ballast to older framing. We also install single-ply membrane systems where the substrate and parapet design support them. The right choice depends on your roof’s structure and drainage, and we’ll explain the tradeoffs before you decide.
Yes, scupper and fascia replacement are part of every Commerce flat-roof reroof we quote. The scupper is the most common failure point on these homes, and leaving old fascia in place just recreates the same leak path. We rebuild parapet flashing, replace rotted fascia, and install new drip edge so water actually leaves the roof. Call (866) 850-2496 for an exact quote.
We install roofing systems from seven manufacturers, including GAF, CertainTeed, and Owens Corning, with a heavy emphasis on membrane products for Commerce’s flat-roof stock. Your recommendation comes from what your roof actually needs, not a preferred-vendor deal. We’ll show you the material options and let you choose what fits your budget.
Ruben Ochoa and the Windmill Roof Repair crew work across Commerce, from the residential streets south of Bandini Boulevard to the warehouse corridors along the 605. If your roof is failing or you just want an honest assessment before committing to anything, call (866) 850-2496. We’ll schedule a free estimate, walk you through what we find, and give you a written quote before any work begins.
Written by Ruben Ochoa, Owner at Windmill Roof Repair, serving Commerce and the Gateway Cities region.