Wall Insulation
Peoria, IL

Wall Insulation for Peoria Homes and Businesses

Illinois has some of the most demanding thermal requirements in the country. Peoria sits in IECC Climate Zone 5, which calls for R-20 minimum in exterior walls. Many older homes in Peoria, East Peoria, and Morton were built to much lower standards — or with no insulation at all in the case of pre-1940s construction.

Spray foam wall insulation addresses two problems at once: thermal resistance and air infiltration. Every gap around an outlet, pipe penetration, or framing connection is a pathway for conditioned air to escape. Fiberglass batts fill the cavity but don't seal those gaps. Spray foam does both.

Applications We Handle

• New construction exterior walls — applied between studs before drywall, often combined with rigid foam sheathing for maximum R-value
• Existing wall retrofits — injected through small access holes in the exterior siding or interior drywall, then patched
• Rim joist insulation — one of the most significant air leak points in Peoria homes; spray foam seals and insulates in one application
• Basement wall insulation — closed-cell applied directly to concrete or block foundation walls, acting as insulation and vapor barrier
• Bonus room and knee wall insulation — common problem areas in Peoria's Cape Cod and split-level homes

Open-Cell vs Closed-Cell for Walls

For interior wall cavities where moisture management is less critical, open-cell foam is often sufficient and more cost-effective. For basement walls, rim joists, and any application touching concrete or masonry — where moisture barriers are important — closed-cell is the standard recommendation.

We'll walk you through both options during the estimate and make a specific recommendation based on your wall assembly and goals.

Wall Insulation Pricing in Peoria IL

Retrofit projects involving drilling and patching are priced differently from open-cavity new construction applications. Call 309-491-4457 for a free assessment — we'll evaluate your specific situation before quoting.

What to Expect on Wall Insulation Day

For open-cavity new construction walls, the timeline is straightforward — we apply foam between framing members before your drywaller arrives. For existing wall retrofits, the process is more involved:

• Access holes are drilled in a consistent pattern (typically from the exterior)
• A small nozzle is inserted and foam is injected to fill the cavity
• Holes are plugged with matching material and painted to match
• Finished walls show no visible evidence of the work

Most retrofit projects in Peoria County homes can be completed in one or two days depending on wall area. We clean up completely before leaving.