- Delaware · PA · NJ
Flat Roofing Services
EPDM, TPO, coatings, repair and replacement for row homes and flat commercial roofs across Wilmington & New Castle County.
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10+ Years Protecting Homes From Roof to Ground
Flat roofs move water differently than pitched ones, and when that system fails, it’s usually not obvious until a stain shows up on the ceiling. Whether your roof needs a quick fix, a protective coating, or a full rebuild, the six options below cover every stage of a flat roof’s life. Find the one that matches what’s actually happening on your roof.
- 4.9 Star Rating · 140+ Google Reviews
- GAF Certified · BBB Accredited
- Family-Owned & Operated
- Free Estimates · Financing Available
What Are Flat Roofs?
A flat roof isn’t actually flat. It has a slight tilt, just enough to move water toward a drain or scupper. When that slope fails, the water doesn’t run off. It sits. That’s where most flat roof problems start.
Wilmington’s housing stock leans older and denser than the suburbs around it. A large share of the city’s homes are single-unit attached properties, and the median home here dates back to the 1940s, with more than 42% built before 1939. Older buildings mean older roof decks, older flashing details, and membranes that have already been patched more than once.
The weather doesn’t help. Wilmington sees over 45 inches of rain each year, and nearly a dozen days bring an inch or more at once. A flat roof with almost no slope has to shed that volume fast, because water can quickly find its way into every seam, drain, and flashing point. Add close to 78 freeze-thaw cycle days a year, and you’ve got a system that’s constantly expanding, contracting, and working its seams loose.
Here at Rain Drainz, that’s the deciding question on every flat roof we look at:
- Is the membrane still sound enough to coat?
- Does it need a targeted repair?
- Has it reached the point where a full replacement is the only thing that actually stops the cycle?
Below are the six ways we solve that. Pick the one that matches what’s happening on your roof.
Find the Right Fix for Your Situation
Not every flat roof problem needs the same solution. A roof that’s ponding but structurally sound is a different job than one with an active leak, and both are different from a roof that’s simply past its usable life. The services below cover coating, repair, replacement, and the specific systems we install.
Flat Roof Coatings
If your membrane is intact but showing age symptoms like chalking, minor cracking, and early UV wear, a full replacement may be overkill. A flat roof coating seals the surface and buys back years of life for a fraction of a new roof’s cost. It’s the move for inner-city flat roofs that aren’t leaking yet but are heading that way.
Silicone Roof Coating
Liquid silicone coatings cure into a seamless, rubber-like membrane with no seams for water to find. It’s UV-stable and holds up under standing water better than most coating types, which is a real advantage on a roof that ponds after every storm.
Flat Roof Replacement
A full tear-off and new membrane isn’t just a repair on a bigger scale. It corrects the underlying slope and drainage issues that caused ponding in the first place. If your flat roof is nearing 20–30 years old, or a coating won’t hold anymore, this is the fix that resets the clock.
Flat Roof Repair
Seams, punctures, ponding spots, and failed flashing are the most common ways a flat roof starts letting water in. Most of these issues are fixable without tearing into the whole system; the kind of fix that needs to happen now, not next month.
EPDM Roofing
EPDM is a synthetic single-ply rubber membrane that’s been the go-to for flat roofs for decades because it simply holds up. Available in black or reflective white, it resists extreme heat, freezing cold, and hail damage, and with proper upkeep, can last 30 years or more.
Commercial Roofing
Commercial buildings have different loads, different foot traffic, and different failure points than a row home roof. From coatings to full systems, we handle flat and low-slope roofing sized for Delaware businesses, not scaled-down residential jobs.
Why Choose Rain Drainz for Flat Roofing
A 4.9-star rating from 140+ Google reviews isn’t just a badge on our site. It means neighbors down the street are still happy with the roof we installed years ago.
We’re GAF-certified and BBB-accredited so the job gets held to standards that aren’t optional, and there’s a path for accountability if something goes wrong. We’re a family-owned crew, not a franchise, and the people quoting your job are the same people standing behind it.
We handle coating, repair, and replacement, all three under one roof. That matters because our advice isn’t limited to the most expensive service on the menu. If a coating can save you the cost of a tear-off, that’s what we’ll tell you.
And it’s not just about the roof itself. Across New Castle County, the vast majority of property damage tied to weather comes from floods and heavy rain. We think about where the water goes after it leaves your roof, not just whether the roof itself is watertight.
Where We Work: Wilmington & New Castle County
Wilmington’s roofs aren’t one-size-fits-all, and neither is our response time.
Row homes and inner-city flat roofs — tight lot lines, shared walls, older decks. These jobs are close to home base, so a fast look at an active leak or a ponding spot doesn’t mean a half-day wait.
Suburban and outer New Castle County properties — Newark, Middletown, and the surrounding area still fall within roughly an hour of our Wilmington shop for larger jobs, with small repairs typically dispatched in under 45 minutes.
We work in Wilmington, Newark, Middletown, Elsmere, New Castle, Bear, Hockessin, Greenville, Claymont, and Pike Creek. We do not currently serve Maryland, Center City Philadelphia, or the City of Chester, PA.
Rain Drainz HQ · 11 Lewis Cir, Wilmington, DE 19804
Frequently Asked Questions About Flat Roofing
What flat roofing services does Rain Drainz offer?
We provide coatings, silicone coatings, full replacement, targeted repair, EPDM installation, and commercial flat roof services. Pick the card above that matches your situation.
What flat-roof systems do you work with?
EPDM, TPO, and modified bitumen. Each has different lifespans and different repair approaches. We’ll tell you which one is actually on your roof before recommending anything.
Should I coat, repair, or replace my flat roof?
It depends on the membrane’s condition, how old the roof is, and whether the damage is surface-level or structural. A coating works on a sound membrane with early wear. A repair fixes a specific failure point like a seam, a puncture, or a flashing gap. A replacement is the answer once the deck or membrane itself has reached the end of its usable life.
Why do flat roofs pond?
Ponding usually comes down to slope, clogged or undersized drains, or deck wear over time. With over 45 inches of rain falling on Wilmington every year, water that can’t get off the roof fast enough will sit, and sitting water is what breaks down a membrane early.
How much does flat-roof work cost in Wilmington?
Cost depends on square footage, the system involved, roof access, and how much of the existing membrane can be reused versus torn off. Pricing varies job to job, so the only accurate number is one built around your specific roof.
Not Sure What Your Flat Roof Needs? Let’s Find Out.
Wilmington’s flat roofs don’t fail slowly. A small ponding spot or a lifted seam can turn into a ceiling stain fast. If you’re not sure whether your roof needs a coating, a repair, or a full replacement, the fastest way to find out is a free look from someone who does all three.
Rain Drainz LLC · 11 Lewis Cir, Wilmington, DE 19804 · (302) 488-8377