Flat and low-slope roofs in O'Fallon, IL

7 O'Fallon roofing companies list flat and low-slope roofs on their website. Each one has a working phone and a live website. Call them direct.

Roofers that list flat and low-slope roofs, A to Z

  1. 1st Source Contractors

    O'Fallon, ILSince 2003

    Wood shake roofs and CertainTeed ShingleMaster work since 2003, plus windows, maintenance and financing.

    • Free inspection
    • Financing

    Also serves Belleville, Collinsville, Lebanon +5

  2. Brandon J Roofing

    O'Fallon, IL

    Owens Corning Platinum Preferred and GAF Master Elite. Slate, ventilation, fiber cement siding and gutter cleaning; family-owned.

    • Family owned
    • Free inspection
    • Financing
    • Emergency service

    Also serves Fairview Heights, Collinsville, Freeburg +20

  3. Clean Slate Home Solutions

    O'Fallon, ILSince 2018

    Emergency service and insurance claim help since 2018, with metal and flat roofs, gutter guards and siding repair.

    • Free inspection
    • Emergency service

    Also serves Shiloh, Swansea, Belleville +16

  4. Hero Roofing & Exteriors

    O'Fallon, IL

    Veteran-owned. Wood shake, tile and metal roofs, waterproofing, coatings and skylights, with financing and a workmanship warranty.

    • Veteran owned
    • Free inspection
    • Financing
    • Emergency service
  5. Matterhorn Exteriors

    O'Fallon, IL

    Windows and vinyl siding with flat-roof work and maintenance, plus financing and a workmanship warranty. Serves Maryville and Troy.

    • Free inspection
    • Financing
    • Warranty

    Also serves Belleville, Collinsville, Maryville +2

  6. The Roofing Guys

    O'Fallon, IL

    Storm and hail repairs, insurance claim help and emergency roof repair. Also serves Mount Vernon and Carbondale.

    • Free inspection

    Also serves Mount Vernon, Carbondale, Carterville +1

  7. TTLC Inc. - Roofing, Siding & Gutters

    O'Fallon, IL

    Exterior painting and roof ventilation, with Owens Corning Preferred, CertainTeed ShingleMaster and GAF Certified credentials.

    • Free inspection
    • Financing
    • Emergency service
    • Warranty

    Also serves Edwardsville

About flat and low-slope roofs

Flat and low-slope roofs do not shed water the way a pitched roof does, so the membrane and its seams do all the work. The common choices are TPO and PVC single-ply membranes, EPDM rubber, modified bitumen, and coatings that extend the life of a sound roof. Ponding water, blocked drains and failed seams cause most leaks. A flat roof needs a look every year or two.

What to ask a contractor

  • Which membrane do you recommend for my roof, and why?
  • How will you deal with ponding water and the drains?
  • Are the seams heat-welded or glued, and how long is the seam warranty?
  • Can the existing roof be coated instead of replaced?

Guide: Roof repair or replacement: how to decideGuide: How much does a new roof cost?