Ethylene Propylene Diene Monomer (EPDM) is the most common material used in flat roofing, as well as the newest. Being made from recycled rubber, EPDM is also environmentally friendly as well as its insulation properties cutting down energy costs. EPDM roofing is waterproof, inexpensive, lightweight and durable which makes it a highly desirable material. However, there are some downsides to EPDM flat roofing. Even though it’s inexpensive, opposed to its counterparts, if it is not installed correctly, it can add up with the costs of fixing and correct installation. If your room has exterior pieces, such as pipes and chimneys, extra care needs to be taken to prevent leaks and gaps.

Built-up roofing (BUR) was the most popular roofing material for flat roofing before EPDM and MBR. BUR is made from tar and gravel, which combines to create a layer which is waterproof and durable. BUR is a great choice if you plan on using the flat roof for something such as a terrace and it’s very hard-wearing and low maintenance. However, there are drawbacks to choosing BUR for your flat roof. The costs of installation can be significantly higher than other types of flat roof and also take more time to install, due to materials used. Due to its weight when complete, it is most suited to roofs with strengthened roof joists.

Modified Bitumen roofing (MBR) was a new technology introduced in the 1960s which revolutionised flat roofing. Until then, people had no choice but to have BUR which had its pros and cons. MBR had the performance of BUR but with added roof wear layers or cap sheets, which adds strength and durability. If installed incorrectly, the overlapping joints may be a source of leaking and damage. The equipment used in installing an MBR roof correctly means that it must be carried out by qualified professionals.