Short Answer
Liquid coating renews the roof you already have, including an aging EPDM roof, without removing it first. New EPDM replacement means new rubber sheets and seams installed on your building. Coating costs less and avoids seam risk entirely, but only works if the existing membrane is still sound enough to coat over.
Side By Side
Where they actually differ
| Liquid Coating | New EPDM | |
|---|---|---|
| Cost | Lower, renews what's already there | Higher, full membrane replacement |
| Lifespan | Extends the existing roof, recoat cycle applies | New rated lifespan, typically 20 to 30 years |
| Disruption | Less, no tear off or new seams | More, full membrane installation |
| Warranty | Follows the Conklin coating system applied | Follows the EPDM manufacturer's own terms |
The Real Difference
Where coating actually beats EPDM
EPDM seams are glued or taped together, and seams are where EPDM roofs actually fail, not the rubber field itself. A liquid coating goes on seamless, there's no seam to separate in the first place. It also comes in a reflective white finish standard, where EPDM is usually black unless you pay extra for a white membrane.
Find out if your EPDM roof qualifies for a coating instead.
FAQ
Straight answers
Can you coat over an existing EPDM roof?
Often, yes, if the membrane is still sound and properly prepped. [ Placeholder: confirm EPDM coating compatibility and prep requirements with Justin before this goes live. ]
Is EPDM ever the better choice?
[ Placeholder: confirm scenarios where new EPDM outperforms coating with Justin before this goes live, likely when the existing roof doesn't qualify for coating at all. ]
Do EPDM seams really fail that often?
Seam failure is the most commonly cited cause of EPDM roof leaks in the industry, particularly on older adhesive seamed systems. [ Placeholder: confirm with Justin if there's a specific stat or example worth citing here. ]