Spray Foam Insulation in Upland - Same-Day Service, Done Right the First Time

Fast, Reliable Spray Foam Insulation Across Upland

Spray foam insulation in Upland typically costs $1.50 to $4.50 per board foot for open cell and $2.50 to $7.00 per board foot for closed cell, with most whole-home retrofit projects landing between $3,500 and $12,000. We’re Thistledown Attic Insulation, part of the Cedarwell family, and we’ve been insulating Inland Empire homes since 2003. Our crews know Upland’s older housing stock well, and we answer every call with a live person, 24/7. Call (909) 768-6501 and we’ll put a written price in your hands before any work starts.

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Why Thistledown Attic Insulation Is Upland’s Preferred Spray Foam Insulation Company

Upland homeowners have a specific problem most insulation companies don’t know how to solve. The citrus era bungalows and Spanish Colonial Revivals along Euclid Avenue were framed with balloon walls that never had insulation in the stud cavities. Not thin insulation, not degraded insulation. Zero. That’s a retrofit challenge newer construction crews from down the hill in Ontario or Montclair rarely see, and it’s exactly the kind of job our technicians have been handling since the early 2000s.

Every technician who walks through your door in Upland is background-checked and uniformed. We wear shoe covers from the front step to the attic hatch, lay drop cloths across your hallway, and leave with a photo of the clean-up. That’s not an upgrade. It’s the Cedarwell Care Promise on every visit. If something isn’t done right, our 365-Day Done Right Promise means we make it right. No debate, no fine print. Neil Barron leads our team with one rule: explain the price before the work, and clean up like it’s your own home.

We answer calls from Upland residents at all hours. Live person, every time. No voicemail trees. When you call at 2 a.m. because you found a cold draft pouring through the nursery wall, someone picks up. That’s the standard.

Open Cell Spray Foam in Upland

Open Cell Spray Foam is the right fit for many Upland attics, particularly in the 1910s through 1940s homes near downtown where existing insulation is sparse or missing entirely. Open cell foam expands to roughly 100 times its liquid volume, filling odd-shaped cavities, rim joists, and attic floor bays that fiberglass batts never sealed properly. It’s also half the cost of closed cell, which matters when you’re retrofitting a 2,000 square foot craftsman with zero existing coverage.

In Upland’s market, open cell spray foam runs $1.50 to $4.00 per board foot installed, depending on depth and access. For a typical 1,500 square foot attic at 8 inches of open cell, you’re looking at $4,000 to $6,500. The material itself is an air barrier, meaning it stops the convective drafts that pull cold mountain air through old plaster walls on winter nights.

What Open Cell Does in Upland’s Hot Attics

Upland sits at 1,200 to 1,500 feet, right at the base of the San Gabriels. Summer attic temperatures can hit 150°F. Open cell foam slows that radiant transfer dramatically, keeping the living space below 15 to 20 degrees cooler. On winter nights, the same air-sealing quality keeps heated air from escaping through the ceiling plane.

Where We Apply It in Older Upland Homes

Most Upland retrofits involve open cell on the attic floor, in rim joists, and inside knee walls. We also use it on the underside of roof decks when the attic is intended to become conditioned space. If you’ve got a detached workshop or garage on an acreage property, open cell is often the most practical choice for the underside of the roof deck.

Spray Foam Insulation Contractors in Upland

Spray Foam Insulation Contractors in Upland need to understand two things most don’t: how to work with balloon-framed walls and how to respect a family’s home while doing it. We recently sprayed open cell foam in a 1920s Craftsman bungalow off Euclid Avenue where the original balloon-framed walls had zero insulation. Using Icynene, we drilled small injection ports between the fire blocks and filled each narrow bay, sealing the cavity against the 100°F summer heat and the cold mountain air that drains down on winter nights. The homeowner, who had watched three prior crews walk away from the fiddly retrofit, finally got a done-in-one-trip solution that stopped the drafts and cut their HVAC runtime.

As a Cedarwell family company, our Spray Foam Insulation team carries products from Johns Manville, Knauf, and Icynene, among others. We match the product to the cavity and the family’s needs. Pet-safe options are part of the conversation where a choice exists, because we know the dog is going to be home during the job.

Balloon-Frame Wall Injection

Narrow stud bays with fire blocks every 8 to 10 feet require a different technique than open attic spraying. We drill small ports, inject foam at controlled pressure, and check expansion depth as we go. Over-expansion cracks original plaster. We’ve seen it from careless crews, and we don’t let it happen.

Garage and Workshop Roof Decks

Upland’s acreage properties often include detached garages, workshops, or ADUs with uninsulated roof decks. Those spaces bake in summer and freeze on winter nights. Spray foam on the underside of the roof deck turns them into usable, conditioned space, and a thermal barrier over open cell foam is code required. We handle that as standard.

Trusted Brands We Service in Upland

Our Spray Foam Insulation in Upland installs use Johns Manville, Knauf, and Icynene products because each behaves differently in different cavities and climates. Johns Manville open cell gives consistent expansion in narrow balloon-frame bays. Knauf closed cell delivers high R-value per inch for roof decks. Icynene is a pet-safe open cell option many Upland families prefer when the dog and kids are home during installation. We keep stock available locally through our Inland Empire dispatch office, which means faster turnaround for Upland jobs and fewer delays when you need a specific product.

Common Spray Foam Insulation Problems We See in Upland Homes

• Condensation in unvented attics. Upland’s diurnal temperature swing can be 40 degrees in a single day. When foam is applied to an unvented attic assembly without accounting for that swing, moisture accumulates at the sheathing. We calculate vapor drive specific to your zip code before recommending a roof deck application.
• Over-expansion in narrow citrus-era cavities. The balloon-framed walls near Euclid Avenue have fire blocks and narrow bays that standard expanding foam can over-pressurize. Cracking original plaster is a real risk with crews that don’t slow the injection rate. We do.
• Missing thermal barriers in attached garages. Upland code requires an ignition barrier or thermal barrier over open cell foam in garages and workshops. Some crews skip it to save time. That’s a code violation and a safety hazard. We never skip it.
• Settled fiberglass in 1950s through 1970s tract homes. South and mid-city Upland homes from the post-war boom often have original batt insulation that’s compressed or degraded below R-13. Before adding spray foam, we identify whether the old material needs removal or can be foamed over.

Pricing for Spray Foam Insulation in Upland, CA

We Also Serve Cities Near Upland

If you’re a few minutes down Euclid Avenue in Ontario, up against the foothills in Rancho Cucamonga, or just over the 210 in Claremont or Montclair, we serve those communities too. Same crews, same written price guarantee, same 365-Day Done Right Promise. Give us a call and we’ll get you scheduled.

FAQs About Spray Foam Insulation in Upland