Spray foam, blown-in, and fiberglass insulation for homes, commercial buildings, and pole barns.
Insulation Service LLC is a full-service insulation contractor headquartered in Mattoon, Illinois. Since 1974, we have completed more than 500 residential, commercial, and agricultural insulation projects across central Illinois.
50+ Years in Business
500+ Projects Completed
A+ BBB Rating
100% Satisfaction Guaranteed
Fully Insured
Free Estimates
Not every insulation problem calls for the same solution. A 1950s ranch home with no wall cavity insulation needs a different approach than a new pole barn on a Coles County farm. We match the material, the method, and the R-value to the structure, the climate zone, and your budget.
Highest performance. Closed-cell delivers R-6 to R-7 per inch — more than double fiberglass batts. Open-cell offers R-3.5 to R-4 with sound dampening.
Dual function. Acts as both air barrier and vapor retarder.
Best for: Attic rooflines, rim joists, crawl spaces, metal buildings, new construction walls. Handles 40% of typical energy loss from air infiltration.
Fills voids. Cellulose and fiberglass fill attic floors, enclosed wall cavities, and hard-to-reach spaces where batt insulation cannot perform.
No drywall removal. Dense-pack cellulose into existing walls through small holes.
Code compliant. Reaches R-49 or higher for Illinois Climate Zone 5.
Ideal for: Restoring settled insulation in older homes — fastest, most cost-effective fix.
Biggest heat loss. Heat rises and escapes through an under-insulated attic straight into the sky.
Our process: Assess existing depth, remove degraded material, air-seal penetrations (electrical, plumbing, HVAC, recessed lights), install to R-49+.
Rooms too hot or cold? Start with the attic — it's usually the culprit.
Problem: Vented crawl spaces let cold air, moisture, and humidity into living spaces. Mattoon summers hit 60%+ humidity.
Our solution: Insulate walls with closed-cell spray foam or rigid foam, install vapor barriers, seal vents.
Result: Warmer floors in winter, lower humidity in summer, less HVAC strain.
Standard applications. New construction walls, floor assemblies, garage ceilings.
Cost-effective. Lowest material cost, fire-resistant, pre-cut for standard 16" and 24" stud spacing.
Proper installation matters: No compression, no gaps at electrical boxes, no voids behind plumbing. Even 5% compression loses measurable R-value.
Farm country reality. Uninsulated pole barns swing from below freezing in January to over 100°F in July.
Problem: Condensation drips from metal roofing onto equipment, feed, and tools.
Our solution: Closed-cell spray foam applied directly to roof panels and wall girts. Stops condensation, creates year-round usable space.
Steel = thermal bridge. Metal wall panels, roof panels, and purlins conduct heat rapidly. Standard batt insulation loses effectiveness.
Our solution: Spray foam eliminates thermal bridging, seals gaps around fasteners and panel laps, prevents condensation that causes rust and mold.
Includes: Barndominiums, warehouses, agricultural storage, new construction and retrofits.
What we insulate: Offices, retail, warehouses, churches, schools, multi-unit buildings.
Commercial requirements: Fire-rating considerations, thicker assemblies, contractor coordination, building inspector compliance.
We bring: Insurance, equipment, and crew depth to handle large-scale work without disrupting operations.
Half a century of experience. Five hundred projects completed. One simple commitment: do it right.
Founded in 1974. We have seen every insulation product evolution, every version of the Illinois energy code, and every central Illinois winter. That accumulated judgment shows up in the recommendations we make.
From 900-square-foot ranch homes in Mattoon to 5,000-square-foot pole barns outside of Tuscola. Every project adds to our understanding of how buildings perform in this specific climate.
Insulation issues do not only surface during business hours. A burst pipe that soaks your crawl space insulation on a Saturday night needs a response plan, not a voicemail. We answer.
Detailed, written estimates at no cost. No vague ballpark numbers over the phone. We show up, measure, assess, and provide a specific scope and price—typically within one business day.
General liability and workers' compensation coverage on every project. If a crew member is injured on your property, our insurance covers it, not your homeowner's policy.
We do not consider a project complete until the work meets our standards and yours. If something is not right, we come back and make it right. That is how we have stayed in business for half a century.
Insulation Service LLC is based in Mattoon, Illinois, and serves a wide region across central and east-central Illinois. We are located along the I-57 corridor, which puts us within a 60-mile radius of most communities in Coles, Douglas, Champaign, Vermilion, Macon, Shelby, Effingham, and Cumberland counties. Travel charges may apply for projects beyond our standard radius.
Our proximity to the I-57 corridor puts us within quick reach of communities across the region. Whether you are in Charleston, Champaign, Decatur, or a farm outside of Tuscola, we have the equipment and the crew to get the job done.
From first call to final walkthrough, we make the process simple and stress-free.
Call us at (217) 508-8095 or submit a request through our website. We will schedule an on-site visit, typically within one business day.
We inspect your property, measure the spaces that need insulation, assess the condition of any existing insulation, identify air leaks, and discuss your comfort concerns and goals. This is not a sales pitch. It is a diagnostic.
You receive a clear, itemized proposal that specifies the insulation type, the R-value being installed, the square footage covered, and the total cost. No hidden fees. No surprise add-ons.
Our crew arrives on the scheduled day, protects your property with drop cloths and plastic sheeting, installs the insulation to manufacturer specifications, and cleans up before we leave. Most residential projects are completed in a single day.
We walk the project with you, answer questions, and confirm you are satisfied with the work before we close out the job.
Stop overpaying for heating and cooling. Stop living with drafty rooms and inconsistent temperatures. Insulation Service LLC has been solving these problems for central Illinois property owners for more than 50 years. We will tell you exactly what your building needs, what it costs, and how long it takes. No pressure. No obligation.