Both are excellent when installed properly. EPDM (rubber) is proven, flexible and cost-effective for residential flat roofs. TPO is white and reflective, which helps on commercial buildings and sun-exposed roofs. We’ll recommend the right one for your roof.
A properly installed EPDM roof lasts 20–30 years. TPO typically 20–25. Coatings can add 10+ years to a sound existing roof.
If the existing roof is dry, well-adhered and structurally sound, a coating is a great, lower-cost option. If it’s wet underneath or has multiple old layers, a coating would only hide the problem. The inspection will tell us which.
We repair them all the time — seams, flashing, punctures and ponding areas. Not every flat roof needs replacement.
First find where the water is getting in. Most flat roof leaks start at seams, at the flashing along walls, vents and drains, or at punctures, and water can travel before it shows on the ceiling. A small leak is fixed by cleaning the area and patching or re-sealing it with the same membrane, EPDM or TPO. If water is trapped under the membrane or the roof leaks in several places, a patch or coating won’t last and the roof should be replaced. DAG Roofs repairs flat roof leaks on Reading row homes, porches and commercial buildings and tarps emergencies first.
Most flat roofs are replaced every 20 to 30 years: EPDM usually lasts 20 to 30 years and TPO 20 to 25. Replace sooner if the roof ponds water, has blisters or open seams, or leaks in more than one place. Regular inspections and small repairs make a flat roof last longer, and a coating can add 10 or more years to a sound roof.
