Commercial and industrial roofing
Commercial roofing for flat and low-slope buildings
Warehouses, distribution centers, retail centers, manufacturing plants, and agricultural processing facilities - from the 60 corridor through Commerce and City of Industry out to the Inland Empire, and across Kern County. We publish the specification, not the adjectives. If you are a property manager or facilities director who is going to forward this to an engineer, that is who we wrote it for.
- CA Licence #1052777
- We price match like-for-like bids
- 5–10 years on labor and workmanship
What a specification-first contractor gets you
Why property managers work with us
Published mil thickness
25 mils for a 5-year term, 30 mils for 10 - verifiable on the roof with a wet film gauge.
A manufacturer warranty we can issue
As a Progressive Materials Certified Licensed Applicator, the warranty is an obligation of the manufacturer, not just us.
Evidence before a scope is written
Moisture survey, adhesion testing, and test cuts happen before we tell you what your roof needs - not after.
A building that stays open
Restoration means no tear-off, no debris, and no closure - when the roof qualifies for it.
What we do
Commercial roofing services
Most commercial work starts here
Silicone roof coating and restoration
Renew a flat or low-slope roof without tear-off, without debris, and without closing the building. Published film thickness, substrate prep, and a manufacturer warranty of 5 to 20 years.
Learn more →Reroofing and roof replacement
When the assembly has actually failed. Tear-off or recover determined by test cuts, insulation and cool roof compliance handled, and the work sequenced around a building that stays open.
Learn more →Inspections and moisture surveys
Condition assessments, infrared moisture surveys, leak investigations, and roof reports for transactions. Written, photographed, and located on a roof plan.
Learn more →Maintenance programs
Two scheduled visits a year, drainage and flashing service, repairs made during the visit, and the documented history your warranty conditions require.
Learn more →Before you choose a direction
Our work
A completed silicone restoration
A commercial strip-center roof with rooftop HVAC. Same roof, before and after — our job, not stock photography.
What changed for 2026
Your next roof project is a code project
The 2025 California Energy Code applies to permits applied for on or after January 1, 2026. If you are planning capital roof work, three things are worth knowing before you write the scope:
- The cool roof requirement is triggered easily— the lesser of 50% of the roof area or 2,000 sq ft. Low-slope nonresidential needs aged solar reflectance of 0.63 with thermal emittance of 0.75, or an SRI of 75.
- Recoating counts as an alteration — which surprises people, and is a non-issue for white silicone, which clears the threshold with margin.
- Replacement adds insulation; recoating does not— a low-slope replacement or recover has to insulate the altered area to Table 141.0-C for your climate zone. The recoated area is not required to be insulated.
Climate zone, exceptions, and local amendments vary. We pull the values for your specific address and jurisdiction as part of scoping.
Why that third point is worth money
Adding insulation raises the roof plane. On a building whose rooftop unit curbs, door thresholds, parapets, drain sumps, and scupper elevations were detailed around the existing height, a couple of inches pulls in a mechanical trade and a pile of detail rework. It is often the largest single cost driver in a replacement, and it never appears in a square-foot comparison.
Separately, the building code prohibits a recover once a roof carries two or more applications of covering — but a protective coating is treated as maintenance rather than an added layer. On a two-layer roof, restoration is frequently the only path that is not a tear-off.
Where we work
Buildings we roof
Warehouse and distribution
Large single-ply and built-up fields along the 60 corridor through Commerce and City of Industry, and out into the Inland Empire. The buildings where a tear-off means shutting dock doors and a restoration does not.
Retail centers and strip malls
Multi-tenant roofs with high HVAC penetration density. Every curb is a leak path, and the flashing detail at curbs is where these jobs are won or lost.
Industrial and manufacturing
Metal and built-up roofs over operations that cannot stop. Chemical and oil exposure from process exhaust drives the membrane selection.
Agricultural processing and packing
Kern County has enormous flat and low-slope metal roofs over packing houses, hullers, and processing plants that nobody markets roof programs to. Note that the refrigerated side of a plant needs a different assembly than the dry side.
Apartment, HOA, and multifamily
Low-slope decks where a tear-off means scaffolding, resident notices, and parking closures. Restoration avoids all three, when the roof qualifies.
Metal roofs
Screw-down panel roofs with fastener and seam leaks. The choice is usually a retrofit standing seam system or a coating restoration, and it depends on panel condition and hold period.
How this goes
How we work with property managers and owners
1. Tell us the question, not just the address
"It leaks in the northwest corner," "we are budgeting a roof for FY27," and "we are in escrow in forty days" are three different jobs. Roof area, membrane type, age, leak history, layer count if you know it, and what rooftop equipment is up there gets us most of the way to the right scope.
2. We walk the roof and test it
Drainage verified 24 hours after rain where possible. Adhesion tested on the actual substrate before anyone writes a coating system. Moisture surveyed where the decision depends on it. Test cuts where layer count and deck condition matter. Findings located on a roof plan and photographed.
3. You get a written specification, not a price on letterhead
Substrate preparation, primer selection by substrate, repair detailing, film thickness or assembly, the warranty term it carries and who issues it, the code compliance path, and the documentation set. Written so your engineer, your plan checker, and your asset manager can each find what they need in it.
4. We tell you when the answer is no
If the insulation is wet across the field, if the membrane will not hold a coating, if the deck is deteriorated, or if the building is refrigerated and needs an assembly designed for vapor drive — we will say so and price the alternative. A failed restoration costs an owner the coating and then the replacement.
5. RFPs and bid comparison
If you are running a competitive bid, we will respond to your documents in your format. If you have bids in hand and cannot tell them apart, the eight questions on theCertified Licensed Applicator page will separate them fast. And if a licensed contractor has bid a like-for-like scope, we will match the price.
Why Green Coast
Straightforward reasons to call us
We price match
Bring us a like-for-like bid from another licensed contractor and we will match it.
Licensed, bonded, and insured
California contractor license #1052777. Verify it yourself at cslb.ca.gov.
Certified silicone applicator
One of the few contractors in the region certified by Progressive Materials to apply and warranty silicone restoration systems.
Workmanship warranty
5–10 years on our labor and workmanship, on top of the manufacturer warranty.
Two CSLB classifications
C-39 (Roofing) and B (General Building). Most roofing competitors carry only the C-39 - holding both means deck, curb, and structural work stays in-house rather than going to a second subcontractor.
Based in Lake Isabella and in business since 2019. Commercial and industrial work across Los Angeles, Commerce, City of Industry, Anaheim, San Bernardino, Riverside, Bakersfield, and Ridgecrest. Our workmanship warranty is 5–10 years on labor and workmanship, on top of the manufacturer warranty on the system.
What you end up with
A written specification naming the substrate prep, the film thickness or assembly, the code compliance path, and who issues the warranty - not a price on letterhead. If a coating is not the right call, we tell you and price the replacement instead.
Serving Los Angeles County and Kern County most heavily.See all service areas
Request a roof evaluation
Not a free estimate off a satellite photo. We walk the roof, test what needs testing, and give you a written answer on what it needs and what the code path looks like — whether that ends in a restoration, a replacement, or a maintenance program.
Green Coast Builders · CA License #1052777 · Licensed, bonded, and insured. Email greencoastbuilders@gmail.com.