FAMILY-OWNED · SINCE 1979 MADISON, WI · CENTERVILLE, IA LIC. DC-080900045
24/7 STORM LINE (608) 909-9109

Home / Residential Roofing / Flat & Low-Slope Roofing

—  Residential Roofing · Flat & Low-Slope

Flat and low-slope roofs, sealed to stay watertight.

Low-slope roofs fail at the seams and the drainage, not the shingles, because shingles don't belong there at all. Buckshot installs and repairs membrane roofs on flat and low-slope areas across Wisconsin and Iowa with our own crews and a real plan for keeping water moving off the roof.

✓TPO · EPDM · Mod-bit✓Free inspection✓Own crews
BGC

Free flat roof quote

WI & IA · We respond in 2 hours

    Start with a free inspection.

    Tell us what's going on up there, a new low-slope roof, a leak, or ponding water, and we'll send a project manager to assess it and put a written report in your hands. We respond within 2 hours.

    ✓Free inspection✓Own crews✓Written report✓WI & IA
    4.9★200+ ReviewsRead our Google reviewsSee our BBB profileRead our GuildQuality reviewsRead our Yelp reviews2%Top GAF Master Elite$0Free Inspection47yrsIn Business

    —  Where It Lives

    SEC 01 / 07

    A different roof needs a different system.

    A low-slope roof sits below roughly a 3:12 pitch, where shingles can't shed water fast enough. These areas use a sealed membrane instead. You'll find them all over a typical home.

    —  What We Install

    SEC 02 / 07

    The right membrane for your roof.

    We match the system to your roof's size, slope, sun, and budget. As a GAF Master Elite contractor we also install GAF low-slope systems.

    ✓

    20 to 30 yrs

    TPO

    White, reflective thermoplastic with heat-welded seams. Energy efficient, clean-looking, and a popular low-slope choice in our climate.

    ✓

    20 to 30 yrs

    EPDM (rubber)

    A proven rubber membrane that's flexible and easy to repair. Durable and budget-friendly, with a long track record on residential low-slope.

    ✓

    20 to 30 yrs

    PVC

    Welded-seam membrane with strong chemical and grease resistance. A premium, long-lasting option for demanding low-slope roofs.

    ✓

    15 to 25 yrs

    Modified bitumen

    Multi-ply asphalt (SBS) that's tough underfoot. A reliable fit for smaller residential low-slope areas like porches and additions.

    —  Repair, Restore, or Replace

    SEC 03 / 07

    Large brick home mid tear-off with the roof decking exposed and ladders in place

    Not every flat roof needs replacing.

    Most low-slope leaks trace back to a seam, a flashing detail, or a clogged drain, not the whole roof. We find the actual source, not just the stain below it, and fix what's failing.

    If the membrane is still sound, we repair seams and flashing, correct drainage, and can apply a restoration coating to add years of life. If it's past that point, we tell you straight and lay out a replacement.

    "We find the real source of the leak, not just the visible spot."

    —  How It Works

    SEC 04 / 07

    From inspection to final walkthrough.

    One Buckshot project manager owns your job start to finish. No handoffs, no call center, no surprises.

    01

    Free inspection

    We check the membrane, seams, flashing, and drainage, then give you a written report.

    02

    Itemized estimate

    A line-by-line estimate naming the system, insulation, and drainage plan up front.

    03

    System & permits

    We recommend the right membrane for your roof and pull the permits you need.

    04

    Installation

    Our own crew installs, welds or seals seams, and builds positive slope to drains.

    05

    Walkthrough

    We walk the finished roof with you and confirm the drainage is doing its job.

    06

    Warranty in writing

    Manufacturer warranty plus our workmanship warranty in writing, with care guidance.

    —  When To Call

    SEC 05 / 07

    Signs your flat roof needs a look.

    Low-slope problems start small and stay hidden until they reach the ceiling. Catch any of these early and a repair usually beats a replacement.

    ✓Standing water that lingers more than a day or two after rain.

    ✓Standing water that lingers more than a day or two after rain.

    ✓Wrinkles, blisters, or bubbling in the membrane surface.

    ✓Seams that have opened, peeled, or pulled apart.

    ✓Cracked or pulling flashing at walls, curbs, and penetrations.

    ✓Ceiling stains, damp drywall, or dripping below the low-slope area.

    ✓Bald spots or heavy granule loss on a modified-bitumen surface.

    —  Why Buckshot

    SEC 06 / 07

    Earned, Not Claimed

    A crew that knows where flat roofs fail.

    Low-slope roofs are unforgiving, and most leaks trace to a seam or a drain, not the field. That's exactly the kind of careful, accountable work a family company built since 1979 is set up to do.

    —  What Homeowners Say

    SEC 07 / 07

    Rated 4.9 stars across 200+ reviews.

    A few words from Wisconsin homeowners. Read the rest on our reviews page.

    Posted on Google Google
    Joy I profile picture
    Joy I
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    When the big storms came through the Madison-area in April 2026, I immediately started looking for a reputable roofer—who also understood the importance of weather-resistant materials that can withstand hail and wind. It didn’t take me long to find Brad from BCG. We had damage that needed to be repaired before the next round of storms came through later that day and Brad had a crew out within hours. Our neighbors also had damage, and when their roofing company didn’t show up, Brad and his crew also took on fixing their damage on the spot. The contracting process was done over email and we were able to clearly understand all of the options available to us. On the day of install, the crew was efficient and fast with their work. But also, mistakes can happen. And what matters to us is not that there’s perfection (because that’s not realistic), but how a contractor deals with a mistake. As they were taking down the tarps when they were finished with the roof, one of our lights next to the garage broke. Brad helped find a replacement online and had it shipped directly to our house! Such great service! All in all, we were very happy with Brad and the service we received from him and BCG. We’ve since recommended their services to several of our friends and neighbors who also had storm damage. While I hope we won’t have to do that again for a long time, we would work with BCG again in a heartbeat!
    Posted on Google Google
    Shelly Ziegler profile picture
    Shelly Ziegler
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    I am extremely pleased with the service Matt Walmer from Buckshot General Contracting (BGC) provided for me during the hailstorm damage in Madison in April. I had just switched insurance companies one year ago and was worried about how much they would cover. Matt assured me everything would be taken care of and had nothing to worry about. True to his word he immediately answered phone calls during off hours even when he was with daughter at volleyball and answering texts in seconds Matt met up with assessor and arrived 20 minutes early. During roof replacement he stopped in 3 times to check the progress and next day he came back to do a walk around to make sure the cleanup was to his standards. I have been so blessed to work with Matt at BGC as my contractor as everything went so smoothly. No problems with my insurance company and I was the first one on my block to get my roof done. I also was telling Matt about some of my neighbors having problems with their insurance and he was willing to look at their paperwork and giving them advice on how to deal with them. I can proudly say I announced to them how good Matt was and gave them his card. Thank you so much Matt for your excellent service and being a great representative for Buckshot General Contracting. These days days it’s hard to find a business that is 100% committed to making sure the customer is their #1 concern. Going to be doing more work and sticking with them as I know it will be top quality.
    Posted on Google Google
    Amy Stephens profile picture
    Amy Stephens
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    We contacted BGC after storm damage and had them completely re-roof and re-side our house, garage, and shed. The entire process was incredibly smooth from start to finish. They were easy to work with, handled all the details, and made what could have been a stressful situation completely worry-free. Our contact, Jayce Kirkland, was outstanding. His professionalism, communication, and courteous demeanor were truly a breath of fresh air. He took care of everything for us and made sure the project stayed on track every step of the way. We couldn’t be happier with the experience and have and would highly recommend BGC to anyone needing roofing or siding work!
    Posted on Google Google
    Rob Anast profile picture
    Rob Anast
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    Very customer focused company. Replaced my roof and siding after hail and wind damage 6 years ago. Second hail and damage storm this year and they are my vendor of choice again. In process now to replace my roof and siding.
    Posted on Google Google
    paolo masone profile picture
    paolo masone
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    Brad gave me a good price and the roof looks great! The roof was replaced in one day.
    Posted on Google Google
    Doug Cooper profile picture
    Doug Cooper
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    They did an excellent job! Fast, efficient and did a great job cleaning up.
    Posted on Google Google
    christos karampetsos profile picture
    christos karampetsos
    Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
    My family member needed a roof replacement after the recent storm in Madison , Chad came out to inspect the roof and went over the options with us. Full roof replacement and the new roof looks GREAT, they were done with in 2 days and left no mess behind which was very thankful for. Thanks !!

    —  Home Base

    Madison, WI · Centerville, IA

    —  Flat Roof FAQ

    FAQ

    Talk to us

    Free inspection · Mon to Sat

    Anything below roughly a 3:12 pitch is low-slope. A truly flat roof still has a slight built-in slope so water can drain. You’ll see them on porches, additions, attached garages, dormers, and modern homes.

    Shingles shed water by gravity and need a steeper pitch. On a low slope, water sits and works underneath them, so low-slope roofs use a sealed membrane where the seams and flashing keep you dry.

    We install TPO, EPDM rubber, PVC, and modified bitumen, plus GAF low-slope systems. We match the membrane to your roof’s size, slope, sun, and budget rather than defaulting to one product.

    Often, yes, without a full replacement. We find the actual source, repair seams and flashing, correct drainage, and can apply a restoration coating to extend life when the membrane is still sound. See roof repair →

    Typically 20 to 30 years for TPO and EPDM and 15 to 25 for modified bitumen, depending on the install, drainage, and maintenance. Good slope and clean drains are what get you to the upper end.

    Yes. Keep drains and scuppers clear, remove debris, and inspect seams and flashing periodically. Catching a small seam or flashing issue early is what prevents an interior leak later.

    Free Inspection · Family-Owned Since 1979

    Get a straight read on your flat roof.

    Whether you need a new low-slope roof, a leak fixed, or a second opinion on ponding water, start with a free, no-pressure inspection and a written report from a family crew that's been roofing since 1979. We respond within 2 hours.

    Buckshot General Contracting, family-owned since 1979. Headquartered at 621 N Sherman Ave, Suite B5, Madison, WI 53704, with a field office in Centerville, IA. Licensed in 24 states. WI Lic. DC-080900045. GAF Master Elite and BBB A+ accredited. Flat and low-slope system lifespans and ratings vary by product, slope, drainage, and maintenance; figures are general guidance, not a guarantee. Credentials and licensing current as of publication.

    Crew available todayFreeInspection1 dayMost installsDeductible onlyOn covered claims4.9 / 5200+ Google reviews

    ●  From the crew that writes the guides

    Done reading? Let us look for you.

    The guides tell you what to check from the ground. We get on the ladder, photograph every facet, and tell you straight: a claim, a repair, or nothing to worry about.

    Free roof inspection

    Three fields. Twenty minutes on site. Zero cost, zero obligation.

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    Rather talk? 608-909-9109