Commercial Roofing & Waterproofing in Arlington Heights, scoped line by line
Commercial roofing and waterproofing in Arlington Heights, IL — TPO, EPDM, and modified-bitumen systems installed and detailed watertight by OnSite crews. Get a scoped estimate at (773) 900-7007.
TPO, EPDM, and modified-bitumen systems installed to spec
Flashings, penetrations, and drains detailed watertight
Tear-off and recover options priced side by side
Documented, itemized scope for your facility or portfolio
Scoped, priced, approved — then built.
Tell us the scope
One building or a whole portfolio — tell us what you're looking at.
We scope it
We read the sequence and the failure points, then tell you what the job actually involves.
Line-item estimate
A sectioned estimate with every line priced — itemized, building by building.
The build
Scheduled crews run the sequence, with one point of contact through completion.
- 01Tear off
- 02Insulation
- 03Membrane
- 04Flashing
- 05Drains
Each pass lands in your estimate as its own priced section — nothing hides in a lump sum.
Talk to our team
Tell us about the project — one building or a whole portfolio — and our commercial team will scope it and get you a line-item estimate.
The commercial roofing & waterproofing estimate, sectioned
- Tear off
- Insulation
- Membrane
- Flashing
- Drains
Every line priced. No lump sums.
Itemized · you approve every lineCommercial Roofing & Waterproofing in Arlington Heights — common questions
Do you handle low-slope commercial roofs in Arlington Heights?
Yes — we install and detail TPO, EPDM, and modified-bitumen systems across Arlington Heights, IL and document the flashings and penetrations in the scope.
Can you re-roof without disrupting the tenants below?
We phase the tear-off and dry-in so the building stays weathertight and operating while the work runs.
Do I get a written, line-item estimate for commercial roofing & waterproofing?
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 Arlington Heights
Terms & disclosures — Illinois
OnSite General Contracting is insured and bonded, and registers with each Illinois municipality as its code requires. Commercial projects are performed under a written contract with a defined scope, schedule, and payment terms.
- A written contract sets the scope, schedule, and payment terms before work begins.
- The payment schedule and Illinois mechanics-lien rights are disclosed in the contract.
- We carry general-liability and workers' compensation coverage; certificates of insurance are available on request.