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Roofing Services

EPDM Roofing
For Flat Roofs.

A rubber membrane that forms one continuous, watertight surface and holds up for decades on flat and low-slope buildings.

Flat and low-slope roofs need a different kind of protection than the pitched roofs on most houses, and in Wisconsin that protection has to survive lake-effect snow, deep cold, and a freeze-thaw cycle that splits anything brittle. EPDM roofing in Wisconsin is one of the most trusted answers for commercial buildings, garages, additions, and other flat structures, a rubber membrane that forms one continuous, watertight surface and holds up for decades in our climate.

EPDM is a synthetic rubber, installed in large sheets that are joined into a continuous, flexible barrier with very few seams for water to find. That flexibility earns its keep here: the membrane expands and contracts with our temperature swings without cracking and stays pliable even when it's bitter out.

The challenge with any flat roof is that water has nowhere to run off in a hurry, so the membrane, seams, flashing, and drains all have to be right. A poor install means ponding, seam failures, and leaks that spread across the whole roof. We're a local crew that installs EPDM with properly welded-and-sealed seams, sound flashing, and real attention to slope and drainage, and we put the scope in writing first.

Have a flat or low-slope roof to protect?

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What We Do

Professional EPDM Roofing Services Across Wisconsin

We install, replace, and repair EPDM on commercial and residential flat roofs statewide.

For commercial buildings, EPDM is a workhorse — warehouses, retail, offices, and other low-slope structures get long life, low cost, and easy maintenance, with wide sheets that cover big areas with minimal seams and stand up to foot traffic, rooftop equipment, and the weight of our winters.

For homes, it's a smart choice on flat or low-slope sections — garages, porches, additions, dormers — where pitched-roof shingles simply won't shed water. Those areas get the same watertight protection as the rest of the house.

EPDM is one of the most affordable flat-roof options, lasts a long time when it's installed well, shrugs off UV and weathering, and is easy to repair if it's ever damaged. Its flexibility is what makes it such a strong fit for a climate where roofing is constantly expanding and contracting. But a flat roof lives or dies on the install — sealed seams, watertight flashing around every drain, vent, and edge, and enough slope to move water to the drains. That's the part we handle so the membrane performs through our hardest stretch.

Watch For This

Signs You Need EPDM Roofing Or Repair

Flat roofs show trouble differently than pitched ones. Watch for these:

  • Ponding water. Water still sitting a day or two after rain stresses the membrane and points to a slope or drain problem.

  • Cracks or splits. Aging or poorly installed rubber can crack, especially in the cold.

  • Seam separation. When seams lift or pull apart, water gets under and spreads.

  • Bubbles or blisters. Trapped moisture or air under the membrane signals a failing surface.

  • Interior stains or leaks. Water inside means the membrane or flashing isn't holding.

  • The roof is 20-plus years old. Even a good EPDM roof eventually reaches the end of its service life.

Any of these, and it's worth an inspection.

Built For Our Climate

Why Wisconsin Building Owners Choose EPDM

Our climate is hard on flat roofs, and EPDM is built for the specific problems it creates.

Snow

Heavy snow piles up and sits for months. EPDM takes the weight and stays watertight as it slowly melts and drains.

Cold & Freeze-Thaw

Repeated freezing and thawing wrecks a brittle surface. EPDM stays flexible in deep cold, so it resists the cracking that destroys lesser materials.

Rain

Flat roofs depend on drainage, and our soaking rains test it. The right slope and sealed seams keep water moving to the drains and off the building.

Wind

Seasonal storms pull at flat-roof edges and seams. Correctly installed and fastened EPDM resists uplift and stays put.

One more thing worth knowing for our climate: EPDM is offered in different membrane thicknesses, and on a Wisconsin flat roof that takes real snow load and foot traffic, the heavier membrane is often worth it. We'll also look at the insulation under the membrane, since the right amount keeps the roof deck warmer, helps the building hold heat, and reduces the condensation that can plague poorly insulated flat roofs in a cold climate. Those are the kinds of choices that don't show up in a bargain bid but decide how the roof performs ten winters out.

No Surprises

How We Install Your EPDM Roof

  1. 1

    Inspection

    We examine the existing roof, seams, flashing, drainage, and any ponding or leaks, including what's hiding below the surface.

  2. 2

    Assessment

    We measure and review slope, drainage, and condition, and tell you whether a repair solves it or the membrane needs replacing.

  3. 3

    Recommendations

    We explain your options, EPDM and alternatives where relevant, and hand you a written estimate. If a repair makes more sense, we'll say so.

  4. 4

    Install

    We lay the membrane, seal every seam, flash every penetration and edge, and confirm the roof drains, protecting your building and keeping the site clean.

  5. 5

    Final Check

    We inspect every seam, flashing detail, and drain, clean up, and review the finished roof with you.

Why Riley's Roofing

Why Building Owners Trust Riley's Roofing

We're Local

Wisconsin crews who know how our weather works on a membrane, here year-round.

Licensed, Insured, And In Writing

A clear written estimate before any work starts.

Repair-First Honesty

If a repair will hold, we won't sell you a full replacement.

Seams And Drainage, Done Right

On a flat roof, that's what decides whether it lasts.

A Clean Jobsite

We respect your property and leave it tidy.

Storm And Insurance Help

If weather caused the damage, we document it and work the claim with you.

Common Questions

Frequently Asked Questions

EPDM is one of the more affordable flat-roof options, a big reason it's so widely used. Your cost depends on the roof's size, the membrane thickness, the condition of the surface underneath, the number of penetrations and drains, and how the membrane is attached — fully adhered, mechanically fastened, or ballasted. Adding or upgrading insulation under the membrane affects the price too, but it often pays for itself in a cold climate. Larger commercial roofs cost more in total but usually less per square foot than small, complex ones. We'll inspect the roof and give you a written estimate with a clear breakdown before any work begins.

A well-installed EPDM roof runs 20 to 30 years, sometimes longer with good upkeep. It depends on the install, how well the seams and flashing were sealed, and whether the roof drains properly. Our freeze-thaw is hard on flat roofs, but EPDM's flexibility helps it outlast brittle materials. A thicker membrane and good drainage also push toward the upper end, while standing water and neglected seams pull the other way. Regular inspections and prompt repairs of small issues go a long way toward getting every year out of it.

It's well suited to cold like ours. Where some materials grow brittle and crack, EPDM stays flexible and handles freeze-thaw without splitting, and it takes the weight of heavy snow as long as the structure and drainage are sound. Its black surface can even help snow and ice melt and drain a little faster on sunny winter days. The one thing to stay ahead of is roof drains freezing shut, which is why we set the roof to drain well and recommend keeping the drains clear heading into winter.

Both are single-ply flat-roof membranes, but they differ. EPDM is rubber, usually black, prized for flexibility, a long track record, and excellent cold-weather performance. TPO is plastic-based, usually white, with a reflective surface that can trim summer cooling costs. EPDM tends to excel in cold and freeze-thaw; TPO offers energy savings through reflectivity. The right call depends on your building, priorities, and budget, and we'll lay out the trade-offs during your estimate.

Yes, and that's one of its advantages — it's one of the easier membranes to repair. A puncture, a lifting seam, or a small split can usually be patched or resealed without redoing the roof, which keeps upkeep affordable. Catching small problems early is the key to its full lifespan. During our inspection we'll flag any trouble spots and tell you whether a targeted repair will serve you or the membrane has reached replacement.

Ponding usually points to a slope or drainage problem. Flat roofs aren't truly flat, they're built with a slight slope to move water to drains. When that slope is inadequate, the drains are clogged, or the structure has settled, water collects and sits, stressing the membrane and shortening its life through freeze-thaw. We'll find why it's pooling and recommend a fix — clearing drains, adding tapered insulation to improve slope, or addressing the membrane.

It's an excellent one. On the flat or low-slope parts of a house — garages, porches, additions, dormers — where shingles won't shed water properly, EPDM gives the same long-lasting, watertight protection a good roof should. The membrane blends in, handles our weather, and is easy to maintain. If a flat section has been giving you trouble, EPDM is often the answer, and we'll inspect it and tell you whether it's the best fit.

Depends on the cause. Damage from a sudden event — storm, hail, or wind — may be covered; damage from age and wear usually isn't. Commercial and residential policies differ, so the specifics matter. If storm damage is part of your situation, we'll inspect, document what we find, and help you work the claim, and we'll give you an honest read on whether it's the kind insurance typically covers.

Schedule Your Free Inspection

Flat and low-slope roofs need protection built for their own challenges, and EPDM roofing in Wisconsin delivers durable, affordable performance that stands up to our weather. Aging, ponding, or leaking commercial roof, or a flat section of your home, we're ready to take a look.

We'll inspect the roof, explain your options honestly, and put a clear written estimate in your hands. No cost, no obligation, no pressure.

Call Riley's Roofing or request a free inspection online and protect your flat roof for the long haul.

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