The roof over your back porch or garage is nearly flat, and it’s the part of the house that always seems to leak first. Shingles were never really meant for it. If you’re looking into EPDM roofing in Kansas City, you’re probably trying to figure out whether a rubber roof is the fix, and whether it’ll hold up to a Kansas City winter.
Those are the right questions. Low-slope roofs are their own kind of roofing, and the wrong material or a sloppy seam will have you back up a ladder with a caulk gun every spring.
APC Roofing is GAF Certified, licensed and insured, and we’ve been in business since 2017. We install and repair EPDM and other low-slope roofs on homes and light commercial buildings across the metro. Your inspection is free. Call 913-398-5020.
What EPDM is
EPDM is a synthetic rubber membrane. It comes in large sheets, usually black, in a few thicknesses (45 and 60 mil are common, with thicker options for heavier use). Because the sheets are so wide, a small roof may have few seams or none at all, and fewer seams means fewer places for water to get in.
Seams that are needed get joined with special adhesive and seam tape, not heat. At the edges, the membrane is sealed under metal trim, and where the roof meets a wall it’s turned up and flashed.
Where EPDM fits on a house
Shingles need enough slope for water to run off before it can work under the laps. On a nearly flat section, they leak. EPDM makes sense on:
- Porch and patio roofs
- Attached garages and carports with low-slope roofs
- Additions, sunrooms and dormers with flat sections
- Low-slope areas where one roof plane meets another
The tricky part on a house is usually the transition, where the rubber roof meets shingles or a wall. That joint has to be flashed so water from the steeper roof runs over the membrane, not under it.
EPDM roofing in Kansas City weather
EPDM handles cold well. It stays flexible far below freezing, so it doesn’t crack in the January freeze-thaw cycles that are hard on stiffer materials. It also tends to hold up to hail better than many people expect, since the rubber gives a little under impact. Large hail can still puncture or bruise it, especially over soft insulation, so check it after a big storm.
Summer is the other side. A black membrane soaks up heat, and the rooms right under it can feel it. White EPDM is available, and TPO, a white heat-welded membrane, is another option if summer heat is a big concern. Our TPO roofing in Kansas City page compares it.
How an EPDM roof goes on
On most homes, EPDM is fully adhered: glued to a clean, smooth substrate board over the roof deck. On larger commercial roofs it may be mechanically fastened along the seams or held down with ballast. Whatever the method, the work that matters most happens at the edges, around vent pipes and at walls, because that’s where low-slope roofs leak.
Before new membrane goes on, the deck underneath gets checked. Wet or rotted wood has to be replaced, and if the roof has a low spot that holds water, it’s the time to fix the slope. If you want to see the whole process, our flat roof installation in Kansas City page covers it.
Common EPDM problems
Older rubber roofs tend to fail in a handful of predictable ways:
- Seams that peel open as the adhesive ages
- Membrane shrinking and pulling away from walls and edges
- Punctures from foot traffic, dropped tools or branches
- Water ponding in low spots, which wears seams faster and freezes in winter
- Flashing around pipes and vents coming loose
Many of these can be repaired with patches, new seam tape or new flashing. If the membrane is shrinking all over or the insulation underneath is wet, replacement usually makes more sense. See flat roof repair in Kansas City for more.
EPDM on commercial buildings
EPDM is a common choice on small commercial buildings and strip-center roofs around Kansas City, both because it handles cold well and because the wide sheets go down quickly. If you manage a commercial property, our commercial roofing in Kansas City page covers repair and replacement options.
How it works with APC Roofing
- Book your free inspection. Call 913-398-5020 or request an estimate online.
- Get a clear, honest assessment and estimate. We check the membrane, seams, flashing and deck, and you get photos plus a written estimate. If a repair will do, you’ll hear that. Financing is available through Aqua Finance, Fortifi, Hearth and Home Run Finance.
- Your roof gets done and the site gets cleaned up.
A small seam leak on a flat roof doesn’t stay small. Water spreads through the insulation under the membrane, and by the time it shows on a ceiling the wet area is usually much bigger than the hole.
EPDM roofing questions
Is EPDM good for a porch or garage roof?
Yes. It’s one of the most common materials for low-slope roofs on houses, because it handles water that moves slowly and stays flexible in the cold.
EPDM or TPO: which is better here?
Both work in Kansas City. EPDM stays flexible in the cold and usually has fewer seams. TPO is white and reflects summer heat. Your roof’s size, use and what’s underneath it usually decide it.
Can you repair my existing rubber roof?
Often, yes. Seams, punctures and loose flashing can be repaired if the rest of the membrane and the insulation are in good shape.
Do you install EPDM in Overland Park, Shawnee and Lee’s Summit?
Yes. We work across the Kansas City metro on both sides of the state line, including Overland Park, Shawnee, Lee’s Summit, Independence and Blue Springs.
Get your low-slope roof looked at
You shouldn’t have to dread every heavy rain. Call 913-398-5020 or book your free inspection online.
Done right, a rubber roof over that porch or garage means a dry ceiling, no more spring patch jobs and one less thing to worry about every time a storm rolls in.
