Roofs should always have a slight slope to allow easy drainage of rainwater and other liquids. However, low depression or sunken areas may start appearing in some regions from time to time. These depressions can cause water accumulation and lead to other structural problems.

Thus, if you notice the issue, you should address it as quickly as possible. You can easily raise the low depression or sunken areas with a variety of materials. Here is a look at three materials you can use to fill in low depressions on flat roofs.

Liquid Fillers

There are a variety of liquid fillers you can use for fixing your roof. For example, you can use a roof patch putty to fill the low depression areas. Similarly, you can also use an epoxy concrete filler. You will need to apply a layer of mastic on top of it. You can also use flexible mastic on its own to fill low depression areas. Make sure you choose a good quality product to ensure the success of the project. Moreover, follow the guidelines mentioned by the manufacturer to get the best results possible.

Sheet Fillers

You can also apply roofing plies to the problematic areas. Old-style roofs have a layer of pieces of asphalt felt paper sandwiched between tar. If you have such a roof, you can fill the low depression spots with two to three layers of felt applied with tar. You can select between asphalt-infused felt, polyester felt and others, depending upon the type of felt that is most compatible with your roof. You can use asphalt, gravel or other materials on top of the felt if you deem it necessary. Again, make sure to follow the manufacturer’s directions for the best outcome. If you have a modern roof made of rubber, you can use a similar rubber material in the low depression areas to bond it with the remaining roof using bitumen.

Asphaltic Fills

Asphaltic fills are mixtures of asphaltic materials and sand, perlite or other aggregates. You can apply them in combination with an asphalt roof coating. They are perfect for flat roofs made of asphalt, metal, or concrete. You will need to cover the asphaltic fills with a layer of gravel or tar to fit the existing roof composition.

Thus, low depressions can be easily filled with readily available materials. The process is also quite straightforward. However, before you start with the process, you will need to determine the cause of the problem. In case the issue is caused by structural damage, it is advisable to tear and repair the damaged roof portion before filling the holes.

If you face low depression or any other roofing issues, feel free to contact MCM Home Exteriors. We provide complete exterior award-winning solutions, in addition to roofing, and have been trusted for more than twenty years. Reach out for a quote!