Flat roofing is very common for commercial applications. It is aesthetically pleasing, versatile, and allows for rooftop installations such as HVAC units and solar paneling. While flat roofing is popular for its design benefits, it can also be problematic. Flat roofing has a very slight slope which makes it easy for rainwater and debris to collect. If the roofing begins to sag, pools of water can collect and cause mold, mildew, and other water damage to your building. It can even seep into the interior of the building if left unattended.
Waterproofing is therefore essential for commercial flat roofing to prevent expensive repairs and potential health hazards within your building. At MaintenX, we use a variety of techniques to waterproof flat roofing and prevent sagging and other issues associated with flat roofs.
Single-ply waterproof membrane
Single-ply membranes are most common for commercial applications, as they are more affordable for large buildings which require a lot of coverage. Plastic fasteners or polyurethane adhesive is used to attach the membrane to the roof. This ensures that the membrane can withstand intense outdoor exposure without coming off. While this method is most common, it can come off more easily than membranes that are installed under the roofing or applied using a liquid method.
Reinforced Bitumen Membrane Waterproofing (RBM)
Bitumen membranes are more common for smaller commercial buildings and those converted from residential buildings, as it is a more lengthy installation process. This type of waterproofing involves layering bitumen across the roof and then installing a polyester coating to ensure water cannot penetrate beneath the roof.
Liquid waterproofing is a less common but highly effective form of waterproofing used for flat roofing. Unlike membrane waterproofing, a liquid coating is applied like paint to the roof to completely seal it. While not as common, this type of waterproofing can last for 30 to 40 years with proper maintenance.
If you are looking to waterproof new construction or an existing commercial building, talk to your local MaintenX team today for more information!