Spray Foam Insulation
The highest-performing insulation we install — polyurethane foam that expands to fill every gap, seam, and penetration, air-sealing and insulating in one pass. Closed-cell delivers R-6 to R-7 per inch and doubles as a vapor retarder; open-cell is a budget-friendly choice for interior walls and deep cavities.
Closed-Cell vs. Open-Cell
Closed-Cell
Dense, rigid, and a Class II vapor retarder. The default for Colorado's climate and the only choice in damp or depth-limited spots.
- check_circleR-6 to R-7 per inch
- check_circleActs as an air & vapor barrier
- check_circleAdds racking strength to walls
- check_circleRim joists, crawl spaces, metal buildings, cathedral ceilings
- check_circleWon't sag, settle, or absorb water
Open-Cell
Lighter and softer, with a lower cost per board foot. Great where you have depth to work with and moisture isn't a concern.
- check_circleR-3.7 per inch
- check_circleExcellent air barrier
- check_circleOutstanding sound dampening
- check_circleInterior walls, deep attic cavities, bonus rooms
- check_circleLower material cost for big fills
Where Spray Foam Shines
The assemblies where foam outperforms everything else.
Attics & roof decks
Bring the roofline into the conditioned envelope — ideal for HVAC in the attic and cathedral ceilings.
Rim joists & crawl spaces
Closed-cell foam stops the biggest hidden air leak in most homes and keeps the crawl space dry.
Metal & pole buildings
Controls condensation on steel, adds rigidity, and turns a barn or shop into a usable, conditioned space.
New construction
One trade, one step: air barrier + insulation, with R-values verified against Climate Zone 5B/6B targets.
How a Spray Foam Job Goes
- 1
Assessment & blower-door baseline
We inspect the building, measure air leakage, and map which assemblies get open-cell, closed-cell, or a hybrid.
- 2
Prep & masking
We protect finishes, set up ventilation, and confirm substrate temperature and moisture are in spec for a clean cure.
- 3
Application in lifts
Foam is sprayed in manufacturer-approved passes to the target thickness — no over-thick lifts, no scorching, no voids.
- 4
Trim, inspect & verify
We trim flush where needed, photo-document coverage, and re-test air tightness so you can prove the result for rebates.
Spray Foam Insulation FAQs
Open-cell or closed-cell — which do I need?
Closed-cell (R-6 to R-7 per inch) is the workhorse in Southwest Colorado: it's a vapor retarder, adds structural rigidity, and is the right call for rim joists, crawl spaces, metal buildings, cathedral ceilings, and anywhere depth is limited. Open-cell (R-3.7 per inch) is a cost-effective choice for interior walls and deep attic cavities where moisture and depth aren't concerns. We spec the right one per assembly — most jobs use both.
Is spray foam worth the extra cost over fiberglass?
For air sealing, yes. Fiberglass slows heat but does nothing to stop air leakage, which is where most of a Durango home's energy is lost. Spray foam air-seals and insulates in a single application, so you hit code-plus air tightness (3.0 ACH50 or better) without a separate sealing step. Homeowners typically see 30–50% heating-cost reductions.
Does spray foam off-gas? Is it safe?
Modern low-VOC formulations are safe once fully cured (typically 24 hours, after which the space is re-occupiable). Our SPFA-trained crews follow strict mix-ratio, thickness, and ventilation protocols, and we use the manufacturer-specified re-entry times on every job.
Can you spray foam an existing home, or only new construction?
Both. New construction is the easiest — open framing, full access. For retrofits we foam attics, rim joists, crawl spaces, knee walls, vaulted ceilings, and bonus rooms. Closed wall cavities are usually better suited to dense-pack cellulose; we'll tell you which approach fits.
Do spray foam jobs qualify for rebates?
Yes. LPEA members can claim up to $1,500/year (or $3,000 income-qualified), the Colorado HEAR program adds up to $1,600 for insulation and air sealing, and the federal 25C tax credit covers 30% of qualifying costs. We document the job so you can collect all of it.
Get a Spray Foam Quote
Free, no-pressure assessment for homes and commercial buildings across Durango and the Four Corners. We'll spec the right foam for every assembly and factor in your rebates.