Insulation in Chicago, scoped line by line
Insulation in Chicago, IL — spray foam, blown-in, and batt installed to real coverage and R-value by OnSite crews, in attics, walls, and crawl spaces. Your phone estimate is free; call (773) 900-7007.
Spray foam, blown-in, and batt matched to the assembly and the code
Attics, walls, rim joists, and crawl spaces sealed and insulated
Air-sealing done first so the insulation actually performs
One accountable crew and a line-item estimate up front
Scoped, priced, approved — then built.
Send photos
Text us a couple of photos of what you're looking at. That's enough to start.
Walkthrough
A Zoom walkthrough of the space — it waives the $149 in-person written estimate.
Line-item estimate
A sectioned estimate with every line priced. You approve every line before any crew arrives.
The build
Our crews run the sequence — demo to punch list — and you sign off on the finished work.
- 01Air sealing
- 02Spray foam
- 03Blown in
- 04Batt
- 05Rim joist
Each pass lands in your estimate as its own priced section — nothing hides in a lump sum.
Get your insulation estimate
Your phone and text estimate is free. An in-person written estimate is $149 — a Zoom walkthrough waives it. On hourly (time-and-materials) jobs, a $129 fee applies per material run. Tell us about the project and we’ll come back with a clear, line-item scope.
The insulation estimate, sectioned
- Air sealing
- Spray foam
- Blown in
- Batt
- Rim joist
Every line priced. No lump sums.
Itemized · you approve every lineInsulation in Chicago — common questions
Which insulation is best for my Chicago home?
It depends on the assembly — attic, wall, or crawl space. We tell you where your Chicago, IL home loses the most and price the material that fits each spot.
Do you air-seal before insulating?
Yes — we seal the leaks first, because insulation over an unsealed assembly never hits the R-value on the label.
Do I get a written, line-item estimate for insulation?
Yes — you get a sectioned, itemized estimate before any commitment, so you see exactly what each part of the work costs. No lump sums, no surprise change orders.
Are OnSite crews licensed and insured?
Yes. Every OnSite crew is insured, bonded, and background-checked, and one accountable team stays with your project from the first estimate to the final walkthrough.
Do you offer financing?
Yes — financing is available through licensed lending partners, so you can spread the cost over time. It's optional and there's no obligation; we can set it up once your estimate is ready.
Is the estimate really free?
Yes. Your estimate is free and there's no obligation — we scope and price the work up front so you can decide with the full picture in hand.
More work we take on in Chicago
Terms & disclosures — Illinois
OnSite General Contracting is licensed and insured to perform work in Illinois. Estimates are provided under the Illinois Home Repair and Remodeling Act.
- Illinois Home Repair and Remodeling Act: a written contract is provided for projects over $1,000.
- Consumers receive the "Home Repair: Know Your Consumer Rights" pamphlet before work begins.
- Right to cancel within 3 business days for eligible home-solicitation sales.