A roofing contractor in Commerce, CA works mostly on low-slope commercial roofs. Commerce is an industrial and logistics city, built around rail yards, distribution warehouses and the shopping center at the Citadel along the I-5, and most of its roof area is flat: built-up gravel, modified bitumen, single-ply membranes and coated roofs over tilt-up and masonry buildings.
From our base on Rosemead Blvd, Commerce is about 10 miles and 25 minutes southwest. The city had 12,378 residents in 2020, many of them in small post-war neighborhoods between the industrial districts, so we also handle residential roofs here. Most of our Commerce calls, though, come from building owners and facility managers dealing with leaks over inventory, offices or equipment.
Warehouse and flat-roof work along the I-5 corridor
Our commercial roofing service covers inspections, repairs, recover and full replacement on low-slope buildings. On the flat roofs common here, flat roofing work includes membrane repair, seam welding, cap sheet replacement and reflective coatings over a sound roof.
| Problem | Where it shows up | Typical fix |
|---|---|---|
| Ponding water | Around clogged drains and low spots between joists | Clear drains, add crickets or tapered insulation |
| Open seams and blisters | Older built-up and modified bitumen roofs | Seam repair or a new membrane section |
| Flashing failures | HVAC curbs, parapet walls, pipe penetrations | New base and counter flashing |
| Skylight and smoke vent leaks | Warehouse roofs with daylighting panels | Reseal, reflash or replace the unit |
Roofing services for Commerce, CA properties
Commercial Roofing
Distribution warehouses, rail-served plants and tilt-up buildings make up most of Commerce's roof area, so commercial inspections, repairs and replacements fill most of our schedule here.
Flat Roofing
Built-up gravel, modified bitumen and single-ply membranes cover nearly every industrial building in Commerce, from the I-5 corridor to the blocks along Washington Blvd and Eastern Ave.
Warehouse & Industrial Roofing
Large tilt-up roofs with dozens of curbs, drains and skylights need drain, flashing and seam work scheduled around shifts, dock traffic and the stock stored directly below.
Roof Coatings
Reflective coatings can extend a sound warehouse roof and help meet Title 24 values, but in Commerce they need regular cleaning, because diesel soot from trucks and trains dulls the surface.
Roof Maintenance
Fall and spring visits keep drains and scuppers clear before the November-to-March rains, when one blocked outlet on a big flat roof can pond water across thousands of square feet.
Roof Repair
Post-war homes in Bandini, Rosewood and Laguna need shingle, pipe boot and flashing repairs, and their flat patio covers and garages often leak where they meet the house.
Commercial Roof Inspection
Buyers, lenders and tenants in Commerce's industrial market often want a documented roof condition report, with photos of drains, seams and curbs, before a lease or sale closes.
Rail yards, tilt-ups and post-war blocks: the Commerce roof profile
Much of Commerce is given over to rail yards, truck terminals and distribution buildings along Washington Blvd, Telegraph Rd and Eastern Ave, with both the I-5 and the I-710 passing through. These buildings carry very large roofs with many penetrations, and a single clogged drain can put water across thousands of square feet. Diesel soot and dust from nearby traffic and rail activity also settle on roofs and drains, which shortens the life of reflective coatings that are never cleaned.
The residential neighborhoods are mostly single-story homes from the post-war decades with composition shingle roofs, where roof repair for pipe boots, flashing and worn shingles is the usual call.
Commerce incorporated on January 28, 1960, largely to keep neighboring cities from annexing its industrial land, and that history still shows on the map. Residential pockets such as Bandini, Rosewood and Laguna sit between industrial districts, close enough that their roofs collect the same soot as the warehouses. Industry here goes back to 1887, when the Santa Fe main line came through, and factories followed in the 1920s, so some older masonry buildings carry several layers of built-up roofing that hide the condition of the deck.
Title 24 on large low-slope roofs and the Commerce building division
Commerce is incorporated, so the city's building division handles roof permits; check current requirements with the city for your building. When a low-slope reroof replaces half or more of the roof, or more than 2,000 square feet on some roofs, Title 24 cool-roof rules apply where the climate zone requires them. The membrane or coating then has to hold 0.63 reflectance after aging, with 0.75 emittance or an SRI of 75 instead, and carry a CRRC label.
We confirm which rules apply before specifying materials, file the permit when the scope requires one and coordinate the inspection.
Roof trouble in Commerce?
Call with your address. About 25 min (10 mi) from our Rosemead Blvd base, with same-day or next-day visits when crews are free.
- 4.9 from 48 Google reviews
- Based on Rosemead Blvd
- Photos and a written quote before work
How do we schedule roof work around a running warehouse?
Facility managers can reach us at (725) 745-8803; we usually get out same-day or next-day when crews are free. We walk the roof with your facility contact, mark leaks against your floor plan, check drains, curbs and parapets, and photograph every finding. You then receive a written quote that separates repairs, permits and any deck or insulation replacement, so you can approve urgent items first and budget the rest.
The Citadel Outlets occupy the site of a former tire factory beside the Santa Ana Freeway, and the Commerce Casino sits off Telegraph Rd. Around them, logistics buildings run in shifts, so we plan roof access for quieter hours, keep materials and debris chutes clear of truck courts, and agree in advance where a crane or lift can set up.
For buildings that cannot afford surprises, roof maintenance visits in fall and spring keep drains clear and catch seam and flashing problems before the rainy season.
We also work in neighboring Montebello and East Los Angeles, along with the other nearby areas listed on this page.
Reviews from San Gabriel Valley customers
4.9★ from 48 Google reviews (checked Nov 2026)
“i had a bad roof leak that ended up causing a ceiling leak inside the house, but the whole experience turned out great with tylzen spoke roofing. grant called me back quickly after i left a message and came out the very next day to inspect the roofing issue. …”
“They did an excellent job replacing my roof. From the start, David clearly walked me through my options, explained the roofing materials, and answered every question I had. His knowledge of the products and the different installation methods made a big difference in my decision and gave me real confidence in the whole process. …”
Roofing questions from Commerce
Can you repair a warehouse roof leak without shutting down operations?
In most cases, yes. Roof repairs happen from above, and we coordinate access, staging and any noisy work with your facility contact. If water is reaching inventory or equipment, we make a temporary repair first and schedule the permanent fix around your shifts, then document both with photos.
Is a roof coating a good option for an older Commerce warehouse?
Only if the existing roof is still sound. A coating can seal a weathered membrane and add reflectivity, but it will not fix wet insulation or a failing deck. We test for soft or wet areas first and, if the roof qualifies, explain which coating suits your membrane and how often it needs cleaning and inspection.
Do you work on homes in Commerce too?
Yes. Commerce's residential neighborhoods have mostly single-story post-war homes, and we handle shingle repairs, reroofs, flat patio covers and gutters there. The same process applies: a roofer on the roof, photos of every problem and a written quote with permits listed separately.
