Insulation in Commerce, CA
Spray foam insulation in Commerce usually costs $2.50-$7.00 per square foot installed, and the work here skews heavily toward flat-roof commercial buildings rather than single-family homes. Commerce is one of the most intensely industrialized cities in LA County, with roughly 13,000 residents but millions of square feet of mid-century warehouses and light-manufacturing plants. Those aging tilt-up concrete shells, built mostly in the 1950s through the 1970s, routinely fail today’s Title 24 energy standards when tenants pull renovation permits. Call (626) 612-1532 and a live person answers, any hour.
Why Commerce Homes Are Different
Commerce sits inland in the LA Basin, where summer highs run 5-10°F above the coast. The city’s concentration of dark industrial rooftops, asphalt truck yards, and sparse greenery amplifies the heat-island effect, which means roof and attic insulation work harder here than in greener parts of the county. Cooling loads on flat-roof buildings are severe, and the return on a roof-deck insulation upgrade is real money.
The residential pockets are mostly postwar working-class homes from the 1940s-1960s, and many left the factory with little or no wall insulation and thin attic batts. But those houses are vastly outnumbered by tilt-up warehouses where the flat roof assembly is the dominant insulation target. When a logistics or manufacturing tenant pulls a tenant-improvement permit, city and county inspectors routinely require the entire roof assembly to meet current Title 24 R-values. That catches landlords off guard, and a single permit cycle can trigger a mandatory retrofit covering 50,000 to 200,000 square feet of flat roof.
Our Main Commerce Services
The two jobs Commerce owners and facility managers call us about most are attic insulation and crawl space encapsulation. Both show up differently here than in neighboring cities because of the building stock and the heat load.
Attic Insulation in Commerce
The 1940s-1960s homes in Commerce were built when energy was cheap and insulation was an afterthought. Most attics we open here still have a thin layer of original fiberglass, if anything at all, and the summer heat pushes straight through the ceiling into the living space. We pull the old material, air seal the attic floor, and blow in fresh coverage to current R-value targets. Full details are on our Attic Insulation in Commerce page.
Crawl Space Encapsulation & Vapor Barrier in Commerce
Postwar homes here often sit over vented crawl spaces that pull damp air into the house all year. In Commerce, that means musty smells, warped hardwood, and higher cooling bills because the HVAC has to condition that damp air. We seal the floor, install a heavy vapor barrier, and condition the space so it stops working against the insulation. The full scope is on our Crawl Space Encapsulation & Vapor Barrier in Commerce page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Spray Foam Insulation in Commerce
Spray foam insulation in Commerce is the fastest way to bring a mid-century flat roof or warehouse wall up to current Title 24 R-values. Because so much of this city is tilt-up concrete and steel deck built decades ago, the air leaks and thermal bridging are severe, and spray foam’s ability to air seal and insulate in one pass is exactly what those buildings need. We install open-cell and closed-cell foam from manufacturers like Icynene and Demilec, and our Spray Foam Insulation crews handle everything from small rim joist jobs to full roof decks.
Open-Cell Spray Foam
Signs you need it
Your attic or walls feel drafty and your cooling bills climb every summer even though you already have some batt insulation.
What it costs in Commerce
Open-cell spray foam in Commerce typically runs $2.50-$4.50 per square foot installed, depending on depth and access.
How we do it
We prep the area, apply the foam to the specified depth, let it expand and cure, then trim and verify coverage with a thermal check.
Closed-Cell Spray Foam
Signs you need it
The roof deck or exterior wall sweats, shows moisture staining, or needs both insulation and a vapor barrier in one layer.
What it costs in Commerce
Closed-cell spray foam in Commerce typically runs $3.50-$7.00 per square foot installed, with roof-deck applications at the higher end.
How we do it
We spray a continuous layer to the required R-value, the foam hardens into a rigid air and moisture barrier, and we verify depth with a probe.
What Spray Foam Insulation Costs in Commerce
| Item | Typical range in Commerce |
|---|---|
| Open-cell spray foam | $2.50-$4.50 per sq ft |
| Closed-cell spray foam | $3.50-$7.00 per sq ft |
| Rim joist spray foam | $800-$2,000 per home |
How long does spray foam last in a Commerce flat-roof building?
Closed-cell spray foam on a properly prepped roof deck lasts the life of the building. We’ve pulled foam from 20-year-old Commerce warehouses and found it performing at original thickness.
Can you spray foam insulation into existing walls in Commerce?
Yes. We drill small access holes from the exterior or interior and inject foam into the wall cavity. That’s common in the 1940s-1960s houses here that were built with empty cavities. Call (626) 612-1532 for a quote.
Blown-In Insulation in Commerce
Blown-in insulation is the standard retrofit for Commerce homes built in the 1940s through 1960s, because it can fill an attic or wall cavity fast without opening up walls. Those older houses usually have minimal original insulation, and the city’s inland heat means the ceiling gets hot enough to bake the rooms below. We install GreenFiber cellulose and Johns Manville fiberglass, and our Blown-In Insulation crews top up existing attics or start from bare decking.
Blown-In Cellulose
Signs you need it
Your attic has settled, patchy insulation or you can see the ceiling joists poking through the old layer.
What it costs in Commerce
Blown-in cellulose in Commerce typically runs $0.90-$1.50 per square foot installed for a standard attic.
How we do it
We air seal the attic floor first, then blow the cellulose to the target depth with a calibrated machine and rake it level.
Blown-In Fiberglass
Signs you need it
You want a non-settling, fire-resistant attic layer and your current insulation looks thin or compressed.
What it costs in Commerce
Blown-in fiberglass in Commerce typically runs $1.00-$2.00 per square foot installed, depending on depth and access.
How we do it
We blow loose-fill fiberglass to the specified R-value, check depth with rulers across the attic, and leave the coverage uniform.
What Blown-In Insulation Costs in Commerce
| Item | Typical range in Commerce |
|---|---|
| Blown-in cellulose | $0.90-$1.50 per sq ft |
| Blown-in fiberglass | $1.00-$2.00 per sq ft |
| Dense-pack wall insulation | $1.50-$3.00 per sq ft |
How much blown-in insulation does a Commerce attic need?
For this climate zone, we typically blow to R-38 or R-49, which is 12 to 16 inches of cellulose or fiberglass. Most older Commerce homes have R-11 or less.
Can you blow insulation over the old stuff in Commerce?
Usually yes, if the existing material is dry and there’s no rodent damage or mold. We inspect first, then blow new material right over the old. Call (626) 612-1532 to schedule an inspection.
Radiant Barrier Installation in Commerce
Radiant barrier installation in Commerce targets the specific problem of this city’s heat-island effect, where rooftop temperatures on flat industrial buildings and asphalt-heavy neighborhoods run far higher than the surrounding basin. On a mid-century warehouse or a postwar home, a foil radiant barrier under the roof deck reflects radiant heat before it ever reaches the insulation below. Our Radiant Barrier Installation crews install Owens Corning and other foil products to cut attic temperatures measurably in summer.
Attic Radiant Barrier
Signs you need it
Your upstairs rooms stay hot late into the evening even after the outside air cools, and the attic feels like a sauna at noon.
What it costs in Commerce
Attic radiant barrier in Commerce typically runs $0.75-$1.75 per square foot installed, depending on roof pitch and access.
How we do it
We staple the foil to the underside of the roof rafters, leaving an air gap, and overlap each seam for continuous coverage.
Radiant Barrier Roof Deck
Signs you need it
Your flat or low-slope roof absorbs heat all day and the space below it is hard to keep cool despite existing insulation.
What it costs in Commerce
Radiant barrier on a roof deck in Commerce typically runs $1.00-$2.50 per square foot installed.
How we do it
We apply the barrier directly to the roof deck in a continuous layer, then verify the air gap and seam overlap before covering.
What Radiant Barrier Installation Costs in Commerce
| Item | Typical range in Commerce |
|---|---|
| Attic radiant barrier | $0.75-$1.75 per sq ft |
| Radiant barrier roof deck | $1.00-$2.50 per sq ft |
| Radiant barrier foil (supply only) | $0.25-$0.50 per sq ft |
Does radiant barrier work in a Commerce warehouse with a flat roof?
Yes, when installed under a roof deck or on top of the ceiling plane with an air gap. It reflects radiant heat rather than absorbing it, which matters most on Commerce’s dark rooftops.
Will a radiant barrier lower my cooling bill in Commerce?
It cuts attic heat gain by 20-30°F on a hot day, which reduces the load on your AC. The payback is fastest on buildings with large flat roof areas. Call (626) 612-1532 for a site check.
Insulation Removal & Replacement in Commerce
Insulation removal and replacement in Commerce usually starts with a rodent problem, a roof leak, or old material that’s settled into a thin useless mat. The 1940s-1960s houses and 1950s-1970s commercial buildings here have had decades for insulation to get contaminated, compressed, or soaked. We pull the old material, sanitize the cavity, and install new insulation that meets current code. Our Insulation Removal & Replacement crews handle everything from small attics to full warehouse bays.
Attic Insulation Removal
Signs you need it
The attic insulation is wet, moldy, or full of rodent droppings, or you’re planning a remodel that requires a clean deck.
What it costs in Commerce
Attic insulation removal in Commerce typically runs $1.50-$3.00 per square foot, with disposal included.
How we do it
We vacuum the old material out with a commercial HEPA machine, bag it, and haul it off, leaving the deck ready for inspection.
Insulation Replacement
Signs you need it
Your insulation has compressed to half its original depth or you’re doing a Title 24-triggered renovation on an older Commerce building.
What it costs in Commerce
Full insulation replacement in Commerce typically runs $2.50-$5.00 per square foot for removal plus new material and install.
How we do it
We remove the old layer, assess the cavity, air seal where needed, and install new insulation to the specified R-value.
What Insulation Removal & Replacement Costs in Commerce
| Item | Typical range in Commerce |
|---|---|
| Attic insulation removal | $1.50-$3.00 per sq ft |
| Contaminated insulation removal | $2.00-$4.00 per sq ft |
| Full replacement (removal + install) | $2.50-$5.00 per sq ft |
Do I need to remove old insulation before adding new in Commerce?
Not always. If the old material is dry and uncontaminated, we can often blow new insulation right over it. If there’s rodent activity or moisture, removal comes first.
How long does an insulation removal job take in Commerce?
A standard Commerce home attic takes one day. Large warehouse or commercial spaces can run three to five days depending on square footage. Call (626) 612-1532 for a timeline.
Attic Air Sealing in Commerce
Attic air sealing in Commerce addresses the gap between what insulation promises and what it actually delivers when air moves through the ceiling. In this city’s older housing and warehouse stock, the top plates, can lights, duct boots, and hatches leak conditioned air into the attic all day long. Sealing those penetrations before insulating is the single biggest efficiency upgrade for most Commerce buildings. Our Attic Air Sealing crews do the sealing and insulation as one continuous job.
Attic Floor Air Sealing
Signs you need it
You can feel drafts around ceiling fixtures or the upstairs rooms stay hot no matter how much insulation you add.
What it costs in Commerce
Attic floor air sealing in Commerce typically runs $0.75-$1.50 per square foot, depending on how many penetrations are involved.
How we do it
We pull back the insulation, seal every gap and crack in the attic floor with foam or caulk, then re-cover with insulation.
Can Light & Duct Boot Sealing
Signs you need it
Your recessed lights are warm to the touch or your HVAC runs constantly and the house still feels uneven.
What it costs in Commerce
Can light and duct boot sealing in Commerce typically runs $15-$35 per fixture or boot.
How we do it
We install fire-rated covers over can lights, seal duct boots to the drywall, and foam any gap around the opening.
What Attic Air Sealing Costs in Commerce
| Item | Typical range in Commerce |
|---|---|
| Attic floor air sealing | $0.75-$1.50 per sq ft |
| Top plate and penetration sealing | $1.00-$2.00 per linear ft |
| Can light and duct boot sealing | $15-$35 per fixture |
How much difference does air sealing actually make in Commerce?
In older Commerce homes, sealing the attic floor can cut air leakage by 30-50%, which shows up directly in lower cooling bills during the basin’s hot summers.
Should I air seal before or after adding insulation in Commerce?
Always before. Insulation slows heat transfer but doesn’t stop air movement. Sealing first means the new insulation actually performs. Call (626) 612-1532 to schedule both as one job.
Wall Insulation in Commerce
Wall insulation in Commerce is most often a retrofit job on 1940s-1960s homes that were framed with empty wall cavities. Those postwar houses lose a surprising amount of cooling through the walls, and the city’s inland heat makes uninsulated walls feel warm to the touch by mid-afternoon. We blow or inject insulation into the existing cavities without tearing out drywall. Our Wall Insulation crews use Knauf and Johns Manville products for this work.
Drill & Fill Wall Insulation
Signs you need it
Your exterior walls feel hot in summer, cold in winter, or you can hear everything happening on the street.
What it costs in Commerce
Drill and fill wall insulation in Commerce typically runs $1.50-$3.00 per square foot of wall area.
How we do it
We drill small holes from the exterior or interior, blow insulation into each cavity, then patch and touch up the holes.
Injection Foam Wall Insulation
Signs you need it
You have empty wall cavities and want an air-sealing insulation that won’t settle or sag over time.
What it costs in Commerce
Injection foam wall insulation in Commerce typically runs $3.00-$5.00 per square foot of wall area.
How we do it
We inject slow-rise foam into each cavity through small ports, it fills the space and seals gaps as it cures.
What Wall Insulation Costs in Commerce
| Item | Typical range in Commerce |
|---|---|
| Drill and fill wall insulation | $1.50-$3.00 per sq ft |
| Injection foam wall insulation | $3.00-$5.00 per sq ft |
| Interior wall soundproofing | $2.00-$4.00 per sq ft |
Can you insulate the walls of a Commerce home without ripping out drywall?
Yes. Drill and fill and injection foam both work through small access holes. That’s how we handle most of the postwar houses in Commerce.
How do I know if my Commerce walls already have insulation?
We check with a borescope through a small hole or use thermal imaging during an audit. Many 1940s-1960s homes here have empty cavities. Call (626) 612-1532 to find out.
Attic Cleaning & Rodent Proofing in Commerce
Attic cleaning and rodent proofing in Commerce is a frequent first step because the city’s industrial surroundings and older building stock create plenty of entry points for rats, mice, and birds. Once rodents move in, they contaminate insulation, chew wiring, and leave droppings throughout the attic. We remove the damaged material, sanitize the space, and seal every entry point so they can’t get back in. Our Attic Cleaning & Rodent Proofing crews do the full cleanup and exclusion in one visit.
Attic Cleanout
Signs you need it
You hear scratching at night, find droppings in the attic, or notice a musty animal smell coming from the ceiling.
What it costs in Commerce
Attic cleanout in Commerce typically runs $500-$1,200 for a standard home attic, depending on contamination level.
How we do it
We remove contaminated insulation and debris with HEPA vacuums, bag everything, and haul it out for disposal.
Rodent Proofing & Exclusion
Signs you need it
You’ve had rodents before, or you can see gaps at the roofline, vents, or utility penetrations where animals could enter.
What it costs in Commerce
Rodent proofing and exclusion in Commerce typically runs $400-$1,000, depending on how many entry points need sealing.
How we do it
We find every entry point, seal them with steel mesh and foam, and verify the attic is closed off before we finish.
What Attic Cleaning & Rodent Proofing Costs in Commerce
| Item | Typical range in Commerce |
|---|---|
| Attic cleanout | $500-$1,200 |
| Attic sanitizing and decontamination | $600-$1,500 |
| Rodent proofing and exclusion | $400-$1,000 |
Does rodent damage always require insulation replacement in Commerce?
If droppings and urine have soaked into the insulation, yes. We replace it. If the damage is localized, we can sometimes remove just the affected sections.
How fast can you get rodents out of a Commerce attic?
Cleanout and exclusion usually happen the same visit. We don’t set traps and wait weeks; we remove the mess and seal the building so new rodents can’t enter. Call (626) 612-1532 to schedule.
Home Energy Audit in Commerce
A home energy audit in Commerce shows exactly where a building is losing conditioned air, which matters here because so much of the stock is old enough to have dozens of hidden leaks. The city’s industrial heat load means a small leak translates into a big cooling bill by August. We test the building envelope, the duct system, and the insulation levels, then hand you a prioritized list of fixes. Our Home Energy Audit technicians use blower door and thermal imaging equipment on every audit.
Blower Door Test
Signs you need it
Your energy bills are high and you can’t figure out why, or rooms feel drafty even with windows closed.
What it costs in Commerce
A blower door test in Commerce typically runs $150-$350 as a standalone service, or as part of a full audit.
How we do it
We mount a calibrated fan in an exterior door, depressurize the house, and measure exactly how much air leaks through the envelope.
Thermal Imaging Inspection
Signs you need it
Some rooms are always hotter or colder than the rest of the house, or you suspect insulation is missing or settled.
What it costs in Commerce
A thermal imaging inspection in Commerce typically runs $100-$250 when added to an energy audit.
How we do it
We scan walls, ceilings, and floors with an infrared camera to find missing insulation, thermal bridges, and air leaks you can’t see.
What Home Energy Audit Costs in Commerce
| Item | Typical range in Commerce |
|---|---|
| Full home energy audit | $300-$600 |
| Blower door test | $150-$350 |
| Thermal imaging inspection | $100-$250 |
Do I need an energy audit before insulating in Commerce?
It helps. An audit shows which upgrades will pay back fastest, so you don’t spend money on insulation when the real problem is duct leakage.
Will an energy audit tell me what Title 24 requires for my Commerce building?
Yes. We check the current R-values against what Title 24 requires for this climate zone and flag exactly what needs upgrading. Call (626) 612-1532 to book one.
Brands We Service in Commerce
We install and service insulation from Owens Corning, GreenFiber, Johns Manville, and Knauf, and we keep common materials stocked for fast turnaround in Commerce. Our brands page shows the full line, but the short version is this: if it goes in an attic or wall, we work with a manufacturer that stands behind it.
Pricing for Insulation in Commerce, CA
| Service | Typical range in Commerce |
|---|---|
| Open-cell spray foam | $2.50-$4.50 per sq ft |
| Closed-cell spray foam | $3.50-$7.00 per sq ft |
| Blown-in cellulose | $0.90-$1.50 per sq ft |
| Blown-in fiberglass | $1.00-$2.00 per sq ft |
| Radiant barrier | $0.75-$1.75 per sq ft |
| Attic insulation removal | $1.50-$3.00 per sq ft |
| Attic air sealing | $0.75-$1.50 per sq ft |
| Drill and fill wall insulation | $1.50-$3.00 per sq ft |
| Full home energy audit | $300-$600 |
| Attic cleanout | $500-$1,200 |
What pushes price up in Commerce is access: flat roofs with parapet edges, cramped attics in older homes, and the sheer square footage of commercial buildings. You’ll get an upfront price before we start, and the Done Right Promise backs the workmanship for life.
Neighborhoods We Serve in Commerce
We cover the entire city of Commerce, including the residential pockets and every industrial district. Most calls in Commerce get a same-day or next-day visit, and for commercial buildings we can often stage a crew within 48 hours.
- Bandini
- Commerce Industrial District
- East Commerce
- Rosewood Park
- Veterans Park area
Service Area - Cities Near Commerce
Walt’s Insulation serves Commerce and the surrounding LA County communities. You’ll find us regularly working in West Covina, CA, La Puente, CA, Irwindale, CA, and Whittier, CA. Dispatch is coordinated from our Los Angeles office, but the crews live and work in these local communities.
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 Insulation in Commerce
Most residential calls in Commerce get a same-day or next-day visit. Commercial and industrial jobs are usually scheduled within 48 hours. Call (626) 612-1532 and a live person answers 24/7, no voicemail.
Most insulation retrofits don’t need a standalone permit, but Title 24 compliance often comes into play when a Commercial or residential renovation triggers a permit. We’ll tell you exactly what applies to your building.
Yes. Flat-roof warehouse retrofits, tilt-up wall insulation, and whole-building air sealing are a big part of our work in Commerce. We stage crews for 50,000 to 200,000 square foot jobs and keep the work on schedule.
What happens when you call
- 1A real person answersNo phone trees - talk to a local insulation pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3A background-checked tech heads outLicensed & insured, typically within 60-minute.
- 4You approve before work beginsNothing starts until you say go.
What Commerce Customers Say
"The house had rats in the attic insulation and a smell we could not place. Walt's crew pulled all of it, sealed the gaps where they were getting in, sanitized, and put in new blown-in. He sent photos of the sealed openings so I could see it done."
- Rosa Delgado"Radiant barrier and new insulation in one visit. Walt explained what the foil actually does and what it does not, which nobody else bothered to. Electric bill in July was the lowest it has been in this house."
- Nadia Haddad"We had the walls of our old house filled with foam through small holes from the outside. Patched and painted the same afternoon. The bedrooms hold heat now and the furnace runs a lot less."
- Linda Baumgartner