Most flat roofs in DuPage County sit on rear additions, attached garages, dormers, and the low-slope porch sections common on older Wheaton and Glen Ellyn homes built before 1960. These low-pitch areas cannot shed water the way a steep-slope shingle roof does, so they need a true single-ply membrane. Summit & Slate installs TPO across Wheaton, Naperville, and Lisle on both residential low-slope sections and small commercial buildings, with every seam hot-air welded rather than taped or glued.
TPO holds up well to our local weather pattern. White TPO reflects summer sun and keeps attic and second-floor temperatures down during the 90-degree July stretches, and the welded seams resist the freeze-thaw movement that splits older built-up tar and rubber roofs every winter here. After a hard DuPage freeze-thaw cycle, the cracks you see in 20-year-old EPDM are exactly where water gets under the membrane. A properly welded 60-mil TPO seam moves with the deck instead of pulling apart.
Owner Mark Sundeen has watched too many flat-roof failures in this market trace back to two things: cheap thin membrane and seams that were never welded. Summit & Slate runs in-house crews on every flat and TPO job, never subcontracted labor, so the people welding your seams are the same crew the next homeowner in Downers Grove or Aurora gets. We pull the required DuPage or Kane County permit, document every penetration, and hand you a 25-year transferable workmanship warranty in writing.
You don't need to book a sales visit to find out where your home lands: enter your address, we measure your roof from satellite imagery, and you get a real estimate range in minutes. We serve Wheaton, Naperville, Aurora, Lisle, Glen Ellyn and Downers Grove and the surrounding the Chicago western suburbs towns.
When do you need Flat & TPO Roofing in Wheaton?
An honest contractor should talk you out of work you don't need. We recommend Flat & TPO Roofing when we see:
- Granules collecting in your gutters and downspouts
- Curling, cupping, or missing shingles
- Daylight or water stains in the attic
- A roof past 20 years on a single layer
- Repeated leaks at the same valley or flashing
- Storm or hail damage documented by an adjuster
If none of these apply, we will tell you so. We would rather earn a repair today than sell a replacement you do not need.
What Summit & Slate Flat & TPO Roofing actually includes
No good-better-best games. This is what is in every Flat & TPO Roofing job we do across Wheaton:
60-mil TPO membrane installation
We install 60-mil TPO as our standard, not the thinner 45-mil builders use to cut cost. The extra thickness handles foot traffic, hail, and ladder contact far better, and it carries a longer manufacturer material warranty on top of our 25-year workmanship coverage.
Hot-air welded seams
Every TPO seam is welded with a robotic or hand hot-air welder so the sheets fuse into one continuous surface. Welded seams are the single biggest difference between a flat roof that lasts and one that leaks. We never rely on seam tape or adhesive at the laps.
Tear-off of failed EPDM and built-up tar
We remove old rubber, tar-and-gravel, and mod-bit roofs down to the deck, replace any rotted sheathing, and check the slope before the new membrane goes on. Layering TPO over a failing roof traps moisture and voids warranties, so we tear off.
Tapered insulation and proper drainage
Standing water is the enemy of any flat roof. On dead-flat decks we add tapered polyiso insulation to build positive slope toward drains or scuppers, raising the R-value at the same time. This stops the ponding that shortens membrane life on Wheaton low-slope additions.
Flashing, curbs, and penetration detailing
Skylights, HVAC curbs, vent pipes, and wall transitions are where flat roofs leak first. We flash every penetration with TPO-coated metal and pre-molded boots, then weld them into the field membrane so there is no exposed sealant doing the work alone.
How Flat & TPO Roofing works with Summit & Slate
Five steps from first call to final walkthrough. You know what happens and when, the whole way through.
On-roof inspection and measurement
We get on the roof, measure the low-slope area in square feet, check for ponding water and soft decking, and identify every penetration and wall transition. You get a written scope and a fixed price, not a phone estimate.
Permit and material order
We pull the required DuPage or Kane County roofing permit and order 60-mil TPO, tapered insulation, and flashing to your exact dimensions. Ordering to spec avoids field seams in the wrong places and keeps the install tight.
Tear-off and deck repair
Our in-house crew strips the old membrane to the deck, replaces any rotted or delaminated sheathing, and confirms the substrate is dry and sound before anything new goes down. Rotted deck is replaced, not covered.
Insulation, membrane, and seam welding
We lay tapered polyiso for drainage and R-value, then fasten or fully adhere the TPO and hot-air weld every seam. Each weld is probe-tested so we know the bond is continuous before we move on.
Detailing, water test, and cleanup
We flash and weld all penetrations and edges, water-test low spots and drains, run a magnet sweep for fasteners, and walk the finished roof with you. Your 25-year transferable workmanship warranty is issued in writing.
How much does Flat & TPO Roofing cost in Wheaton?
Most Wheaton-area flat & tpo roofing jobs run $9,000 to $22,000, set by roof size, pitch, and material.
Real -area ranges for a typical home, including tear-off and disposal:
| Material | Installed range | Lifespan |
|---|---|---|
| Architectural asphalt shingleMost common choice | $9,000 to $15,400 | 25 to 30 yrs |
| Impact-rated shingleClass 4, insurance discount | $10,350 to $18,700 | 30 yrs |
| Standing-seam metalLongest service life | $19,800 to $35,200 | 50 yrs |
Ranges, not quotes, pitch, layers, chimneys, and skylights move the number. Your free satellite estimate narrows this to your exact home. Financing from /mo with $0 down; checking your rate is a soft pull and won't affect your credit.
From Flat & TPO Roofing customers
"Our 1962 ranch had three layers of shingles and Mark's crew tore all of it down to the deck instead of laying over like the last company wanted to. They found rotted sheathing over the garage we never knew about and replaced it before the new GAF shingles went on. Site was spotless every night. The 25-year warranty is in writing and transferable, which mattered to us since we may sell in a few years."
"After last February's freeze-thaw stretch we had water staining the upstairs ceiling. Mark came out himself, showed me the attic had almost no soffit-to-ridge airflow, which is why the ice dams kept forming. They added baffles and a ridge vent and re-did the valley flashing. No leaks through this past winter. He explained the actual cause instead of just selling me a new roof."
"The June hail storm beat up our roof and Mark's office walked us through the whole insurance claim. They met the adjuster on site and documented everything. Crew finished our two-story in a single day, in-house guys, no random subs showing up. Impact-resistant Class 4 shingles went on and our insurer gave us a premium discount for it. Honest pricing, no high-pressure storm-chaser nonsense."
"A summer wind event ripped shingles off the back slope. Two storm-chasing companies knocked on our door the same week with scary estimates. We called Summit & Slate instead because they are local and GAF Master Elite. Fair quote, no pressure, and they matched the existing shingle color almost perfectly. Mark stands behind his work and you can actually reach him."
"Got three quotes for replacing our aging architectural shingle roof. Summit & Slate was not the cheapest but Mark walked the roof, photographed the soft spots, and gave a line-item estimate with no surprises. Crew was respectful, protected the landscaping, and ran a magnet over the whole yard for nails when they finished. The transferable workmanship warranty sealed it for us."
Why choose a family-owned, GAF Master Elite Contractor roofer?
Mark Sundeen started Summit & Slate Roofing in 2005 after a decade installing roofs across DuPage County, tired of watching homeowners get burned by storm-chasers and subcontracted crews. He grew up in Wheaton and still lives here, so when he warranties a roof for 25 years he expects to drive past it for the next 25. Summit & Slate runs its own crews, never subs out the work, and holds GAF Master Elite certification, a standing fewer than 2% of US roofing contractors earn. Mark's standard is simple: tear off to the deck, fix what the last guy hid, flash it right, and leave a roof that survives a Chicago winter and an August derecho. He still climbs roofs on the hard ones.