EPDM and TPO membrane roofs done right — on porches, additions, dormer tops, garage roofs, and small commercial buildings across Hanover, Spring Grove, and York PA. Heat-welded seams, real ponding solutions, and a 20-year manufacturer warranty backed by a written workmanship warranty from us.
Most roofers in York County install one or two flat roofs a year and call themselves "rubber roof certified." Cool Water Roofing has installed and repaired hundreds of EPDM and TPO membrane roofs across Hanover, Spring Grove, and York PA since 2007 — it's the work we genuinely specialize in. If your home has a low-slope porch roof, an addition with a flat top, a dormer cap that keeps leaking, or a small commercial building with a membrane roof at the end of its life, you are on the right page.
Flat and low-slope roofs are not just shingled roofs that happen to be flatter. The geometry changes everything. Water cannot shed off a 1/12 or 2/12 pitch the way it does off a 6/12 — it sits, it travels sideways, it works under any seam that is not fully welded. The product, the seam method, the flashing details, the drainage plan, and the substrate all have to be right or you get a leak inside two winters. We install rubber roof systems that routinely last 40 to 50 years in York County's freeze-thaw climate, and we back every install in writing.
People often call any flat roof a "rubber roof," but there are three different membrane systems we install in York County, and they each have a place. Here is when we recommend each one:
Our flat-roof installs in Hanover, Spring Grove, and York PA include the items below as standard. We do not cut corners on the substrate or the flashing — those are the two places flat roofs fail. If you have been quoted a "rubber roof" by another contractor for a price that seems too good to be true, ask them which of these are included. Usually it is the substrate work that gets skipped.
Almost every older home in Hanover, Spring Grove, York City, and the surrounding boroughs has at least one low-slope section somewhere — most homeowners just don't realize their flat roof is its own roof system until it starts leaking. The most common applications we install across York County:
Not every leaking flat roof needs to come off. If the membrane is less than 15 years old and the failure is at a single seam, a flashing detail, or a punctured spot from a fallen branch, a targeted flat-roof repair can buy you another decade for a fraction of the cost of a tear-off. We do those repairs honestly — if a patch will hold, we will tell you, and we will do it.
What we will not do is patch a 25-year-old EPDM that has alligatored across the whole field. At that point the membrane is brittle, the seams are giving up everywhere, and any patch is a temporary fix at best. If your existing flat roof is past its useful life, the right move is a full rubber roof replacement down to the deck. We will tell you which situation you are actually in after the free inspection, and we will not push you toward the bigger job if a repair is what is honestly called for.
We come out, get on the roof, and look at the membrane condition, the seam integrity, the flashings, the drainage pattern, and the substrate underneath. Photos of everything — usually 20 to 40 — go into a written report that we email you within 24 to 48 hours along with a quote.
The quote spells out the membrane (EPDM or TPO), the substrate work needed, the flashing scope, and the warranty. If you want to see what an upgrade to TPO would cost over EPDM, or what tapered insulation adds to fix a ponding problem, those are line items you can see and decide on.
A standard residential porch or garage roof goes on in one to two working days. Larger additions or small commercial buildings stretch to two or three days depending on substrate work. Same crew on the job from start to finish — no roving subcontractors. We dry the deck in the same day we tear off so an unexpected storm cannot soak the structure.
Before we pull the dump trailer off your driveway, every seam gets walked, probed, and signed off. Magnetic nail sweep across the lawn and driveway. Walk-around with you, warranty paperwork emailed, and we are gone.
The same things show up in every flat-roof job we finish: seams that actually hold, flashings done in metal instead of caulk, and a written warranty you can call us on. We are licensed and insured in Pennsylvania (PA18635), based in Spring Grove, and rubber roofing is the part of the business we have done the longest. Most callbacks we get on flat roofs are not on jobs we installed — they are on jobs another contractor installed, where a homeowner is searching for a roofer who actually knows membrane work after their first roofer disappeared.
If you have a flat roof that is leaking, ponding, or simply old, the right place to start is a free on-site inspection. We will tell you straight whether it needs repair or replacement, what the right membrane is for your application, and what the honest price range looks like — no pressure, no upsell. If you are mid-project on a new build or addition with low-slope sections, we can spec the membrane work alongside the main shingle roof so the whole roof system is covered by one contractor with one warranty.
Ready to talk flat roofs? Call 717-823-6501 or request a free quote online. We answer the phone, we will give you straight answers, and we will be on the roof when we said we would be.
"Our front porch roof had been patched three times by two different roofers and still leaked every spring. Cool Water tore the whole thing off, fixed the rotted decking underneath, and put down new EPDM with a real metal drip edge. Three years dry. Should have just called them first."
"Replaced the flat roof on our detached garage in Spring Grove. The original was modified bitumen and it was failing at every seam. They put rubber down in a day, cleaned up like they were never here, and the price came in right where they quoted. Would hire again without thinking."
"We own a small storefront in York and the flat roof had been patched so many times the seams were just black asphalt soup. Cool Water put down white TPO with welded seams. The shop runs noticeably cooler in summer now, and zero leaks through the first winter."
Free inspection, written quote, and a real answer about whether yours needs a repair or a full replacement. EPDM and TPO specialists across Hanover, Spring Grove, and York PA.