OLSON Windows, Doors, Siding & Roofing

Category

Roofing

Address

28369 Davis Parkway, Warrenville, IL 60555

Phone

(630) 821-7740

Website

olsonwindows.com/warrenville-il

Data checked

November 6, 2026 (OpenStreetMap)

Before You Hire

Facilities usually schedule roofing contractors twice a year, usually spring and fall, and after major storms. Ask:

• Do you take commercial work, and do you service buildings like ours?
• Can you send a certificate of insurance naming us as additional insured?
• Do you work on our roof type (TPO, EPDM, modified bitumen, metal)?
• Are you approved by the manufacturer so our roof warranty stays valid?
• Will you give us a written inspection report with photos?

All 8 questions to ask →

Hiring Tips

• Read your roof warranty first: unapproved repairs can void it.
• Keep drains and scuppers clear; standing water shortens a flat roof's life.
• Limit roof access and log who goes up.

Getting several quotes? Line them up in the quote comparison tool and check the contract checklist before you sign.