EPDM is a very durable synthetic rubber, used for flat roofs and gently sloped roofs. Cork Roofing Services. Roofing Services we work with clients all over Cork, installing high quality EPDM roofs. These roofs are available in both black (appears like a dark grey) or white. Our experienced team can offer advice on what will work best for your building. One of the reasons EPDM is so successful is that it is perfect for a wide range of climates, helping to keep in the heat in cold weather and regulate temperatures in hot conditions. This helps to keep both heating and air conditioning costs down.