The smart, cost-effective choice for interior insulation in Billings homes. Fills every gap, stops air leaks, and cuts energy bills — all at a lower cost than closed cell.
📞 Get a Free QuoteOpen cell spray foam is a softer, more flexible two-component polyurethane foam. Unlike closed cell foam, the cells are intentionally left open during curing, which gives it a spongy texture and lower density. It expands aggressively — up to 100x its original volume — filling every crack, gap, and irregular cavity in your walls and attic.
It delivers R-3.7 per inch, creates a complete air seal, and is one of the best performing insulation options for interior applications in Billings homes and businesses.
• Interior walls and attic floors
• Sound dampening between floors
• Irregular cavities and hard-to-reach spaces
• Budget-conscious projects
• Anywhere vapor barrier isn't required
• Exterior walls and rooflines
• Crawl spaces and basements
• Anywhere moisture control is critical
• Maximum R-value in minimum thickness
• Structural reinforcement needed
Not sure which one fits your project? Call us — we'll give you a straight answer with no upsell pressure.
Complete air seal: Open cell foam expands to fill every void. Even tiny gaps around wiring, plumbing, and framing members get sealed — these are the invisible sources of energy loss in most Billings homes.
Excellent sound control: The soft, open structure absorbs sound waves. If you're insulating between floors or rooms, open cell foam significantly reduces noise transmission.
Lower cost than closed cell: Open cell foam typically costs 30–50% less per square foot than closed cell, making it the right choice for large surface areas like attics and interior walls.
Vapor permeable: Open cell foam allows moisture vapor to pass through, which can be beneficial for wood-framed structures that need to breathe.
• Attic insulation — the #1 source of heat loss in Montana homes
• Interior wall cavities — new construction and renovations
• Cathedral ceilings — fills complex framing without gaps
• Between floors — for sound dampening and temperature separation
• Around windows and doors — stops drafts at the source
• Bonus rooms and additions — complete air sealing for comfort
We serve Billings and Yellowstone County. Call (406) 630-7322 or fill out our contact form for a free, no-pressure estimate.