Diy flat roofing aren’t always easy to install or repair. Whether they cover a big-box department store in rainy Seattle or a Modernist retreat in sunny Southern California, these structures are designed to hold the weight of snow and rainwater—and they must be made to last.

Choosing the right materials is key to the long-term success of any flat roof. Some options are more durable than others, and it is important to get professional advice before making a choice. This is particularly true when dealing with an older roof that may require structural repairs before a new flat roof can be installed.

One of the best options for a flat roof is a single-ply membrane that provides watertight protection, resists UV rays and can be installed in layers that will protect the existing structure. This type of roof is usually the least expensive and easiest to repair when needed.

Choosing the Right Flat Roof Coverings: Materials and Options

Other options include built up roofs (BUR), which have a textured tar and gravel surface, and EPDM rubber roofing, which is extremely durable and aesthetically pleasing. Those in search of a more energy-efficient option may want to consider polyvinyl chloride (PVC) or thermoplastic olefin (TPO).

Once the sheathing and decking are installed, it’s time to add a layer of the chosen flat roof material. Before doing so, however, it is a good idea to walk around the roof and inspect it for signs of leaks. If you see any cracks or bubbles, these should be repaired immediately before they become larger and allow water to penetrate the underlayment and cause structural damage. In addition, it is important to check for any branches that may rub against the roof covering.