Fast, Reliable Spray Foam Insulation Across Bloomington
Spray foam insulation in Bloomington costs between $1,100 and $3,800 for most wall and rim joist projects, with whole-attic applications running $2,400 to $6,900 depending on square footage and foam type. We’re Hearthside Insulation, and we work throughout the 92316 zip code, from the older ranch tracts off Cedar Avenue to the newer builds near Slover Avenue. Our crew knows what these mid-century stucco homes need, because we’ve been inside hundreds of them. Call (877) 265-4871 and we’ll give you a straight answer about what your house actually needs, not a sales pitch for whatever foam we happen to have on the truck.
Why Hearthside Insulation Is Bloomington’s Preferred Spray Foam Insulation Company
Bloomington homeowners call us because we’re insulation specialists, not a general contractor running spray foam as a side job. We carry both Icynene and Demilec spray foam systems, which means we can honestly compare open-cell and closed-cell options for your specific walls, attic, or rim joists instead of steering you toward the one product line we happen to sell. That matters a lot in Bloomington, where a 1950s ranch with 2×4 cavities needs a different foam density than a converted garage with open rim joists. Trevor Bassett, our owner, built Hearthside around one principle: match the material to the application, not the other way around.
We also know Bloomington’s housing stock in a way that matters for your project. These stucco-over-wood-frame homes with shallow wall cavities respond differently to spray foam than the newer builds in Fontana or Glen Avon. When you call, you talk to someone who knows your neighborhood, your home’s likely construction, and what the July heat actually does to a west-facing attic off Slover Avenue. Response time to most Bloomington addresses is same-day or next-day for estimates.
Spray Foam Wall Insulation in Bloomington
Spray Foam Wall Insulation is one of the highest-impact upgrades you can make to a mid-century Bloomington ranch, because the original walls were often left empty or packed with thin, settled batts that do almost nothing when attic temperatures climb past 130°F. Instead of tearing out drywall or re-siding, we can inject or spray foam directly into existing wall cavities, sealing air leaks and adding R-value in a single pass. Most Bloomington wall cavity projects run $1,300 to $2,900 for a typical single-story home’s exterior walls.
Open-Cell for Shallow Cavities
Bloomington’s older homes typically have 2×4 framing, which gives you about 3.5 inches of depth to work with. Open-cell foam expands gently and won’t put outward pressure on stucco or drywall the way aggressive closed-cell expansion can. It’s the safer choice for homes where the stucco is already 60 years old and we don’t want to risk cracking it.
Closed-Cell When Structure Matters
If your Bloomington home has a converted garage or an addition where the wall framing was done without permits, closed-cell foam adds structural rigidity along with insulation. That’s often worth the higher material cost in homes where the existing sheathing is thin or the framing is undersized for modern wind loads. Expect to pay $2,200 to $3,800 for closed-cell on a full exterior wall retrofit.
Rim Joist Spray Foam in Bloomington
Rim Joist Spray Foam is one of the most overlooked air leaks in Bloomington’s ranch homes, and it’s also one of the cheapest to fix. The rim joist is the band of wood that sits on top of your foundation wall, and in many 1950s and 1960s stucco houses off Cedar Avenue and around Bloomington Community Park, it was never sealed at all. That gap lets hot attic air pour down through the wall cavities in summer and cold night air flood in during winter. Sealing a typical single-story Bloomington home’s rim joists runs $540 to $1,100.
Stopping the Attic Bypass
When your attic heats to 140°F in July, that air doesn’t just sit up there. It pushes down through any opening it can find, and the rim joist is usually the biggest one. Two inches of closed-cell foam on the rim joist blocks that bypass completely, and it also keeps dust, insects, and rodent activity out of the wall cavities. This is a half-day job for our crew in most Bloomington homes.
Converted Garage Rim Joists
Many Bloomington garages were converted to living space decades ago, often without insulation and sometimes without permits. These conversions almost always have open rim joists. We’ve seen it repeatedly: a 1950s ranch off Cedar Avenue where the west-facing attic had only settled R-7 batts and the rim joist was completely open, letting 140°F air pour into the wall cavities. We sprayed 2 inches of closed-cell on the rim joist and 3 inches of open-cell in the walls, which stopped the draft and cut the homeowner’s July cooling bill noticeably. That’s the kind of fix that pays for itself in one Inland Empire summer.
Trusted Brands We Service in Bloomington
Our Spray Foam Insulation team installs Icynene and Demilec spray foam systems, and we keep both open-cell and closed-cell products stocked for Bloomington jobs. For homes where spray foam isn’t the right fit, we also install Owens Corning fiberglass and Johns Manville products, so you’re never pushed into foam just because that’s what we have on the shelf. Eight brands, three methods, one specialist. That’s the Hearthside way, and it’s why Trevor Bassett answers questions about material tradeoffs directly instead of dodging them.
Common Spray Foam Insulation Problems We See in Bloomington Homes
- Foam over settled batts without air-sealing first. We see this in older Bloomington attics where a homeowner or unlicensed handyman sprayed foam over existing insulation without sealing the gaps first. The result is trapped heat and poor performance, because the air leaks are still there under the foam.
- Open rim joists in converted garages. Bloomington’s many converted garages and unpermitted additions often have rim joists that were never sealed. Hot attic air bypasses whatever wall insulation exists, and the room never cools down in summer.
- Overfilled shallow wall cavities. High-expansion foam injected into 2×4 walls can bow drywall or crack stucco on older homes. We use low-expansion or open-cell foam specifically to avoid this in Bloomington’s mid-century construction.
- West-facing attic heat load. Homes along Bloomington’s west side, particularly those with low-pitch roofs, absorb brutal afternoon sun. This is the most common call we get in July and August, and it’s where air-sealing plus spray foam makes the biggest difference.
Pricing for Spray Foam Insulation in Bloomington, CA
Here’s what you can expect to pay for spray foam work in Bloomington as of 2025. Rim joist sealing runs $540 to $1,100 for most single-story homes. Wall cavity injection runs $1,300 to $2,900 for a typical ranch’s exterior walls. Full attic spray foam, either roof deck or floor, runs $2,400 to $6,900 depending on square footage. Closed-cell foam costs roughly 60 to 90 percent more than open-cell per board foot, but it adds structural strength and a vapor barrier that open-cell doesn’t provide. Material choice, access difficulty, and whether we need to remove old insulation all affect your final number. Call (877) 265-4871 for a free estimate, and we’ll give you an honest range before we ever step on the property.
We Also Serve Cities Near Bloomington
Hearthside Insulation works throughout the western Inland Empire, and we regularly send crews to Bloomington along with Fontana, Glen Avon, Pedley, and Sunnyslope. If you’re in one of those neighboring communities and need spray foam done right, the same crew, same brands, and same honest pricing applies. Call (877) 265-4871 and ask for an estimate.
Serving Bloomington, CA — Our Local Coverage Area
We’re based in the Bloomington 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 Spray Foam Insulation in Bloomington
Yes, and it’s often the best option for those older 2×4 walls. We use open-cell or low-expansion foam that fills the cavity without putting outward pressure on your stucco or drywall. Many of these homes were built with empty wall cavities or thin batts that settled decades ago, and spray foam seals and insulates in one pass without tearing out drywall. Call (877) 265-4871 and we’ll evaluate your specific wall construction.
Yes, and it’s the most common complaint we hear from Bloomington homeowners in summer. In a hot, dry Inland Empire climate like ours, attic temperatures routinely exceed 130°F, and that heat radiates down into living spaces all afternoon. Spray foam on the attic floor or roof deck cuts that heat transfer dramatically, and sealing the rim joists stops hot air from bypassing your wall insulation entirely. This is where we see the fastest payback on cooling bills.
Start with the rim joist, then the walls. Converted garages in Bloomington are almost always unsealed and under-insulated, because most of those conversions were done decades ago without permits or energy codes. Two inches of closed-cell foam on the rim joist plus open-cell in the wall cavities turns a hot, drafty room into conditioned space. We’ve done this on dozens of Bloomington garage conversions, and it works.
Sometimes, and it depends on what’s already there. If your Bloomington attic has old fiberglass batts that are dry and intact, we can often spray foam over or around them after air-sealing. But if the existing insulation is settled, rodent-damaged, or water-stained, it needs to come out first. We’ll tell you honestly which applies to your home when we inspect it. Call (877) 265-4871 and we’ll take a look.
Very well. Spray foam doesn’t settle, sag, or lose R-value the way fiberglass batts do, and it’s not affected by the large day-night temperature swings we get in the Inland Empire. Closed-cell foam also acts as a vapor barrier, which matters less in dry Bloomington than in coastal areas, but still helps regulate moisture in walls. Open-cell foam handles the thermal expansion and contraction of older wood framing without pulling away from the studs over time.
Written by Trevor Bassett, Owner at Hearthside Insulation, serving Bloomington and the surrounding Inland Empire communities.