Post by Aug 3, 2020 11:00:00 PM · 1 min read

What Is A Built-Up Roofing System?

Built-up roofing is a type of roofing material that is used on low-slope roofs. It is made up of layers of bitumen and reinforcing fabric. Built-up roofing, or BUR, is preferred for flat roofs because it creates a sealed surface.

Types of BUR Roofing

BUR roofing is typically made out of ply sheets, bitumen material and at least one surfacing material. Bitumen can either be hot or cold. If it is hot, then it will have to be heated before it is installed. Cold bitumen acts as an adhesive and does not have to be heated.

The ply sheets are special types of fabric that are reinforced with organic materials or fiberglass. Every ply sheet will be laid over the hot or cold bitumen. Surfacing materials are made up of either fine gravel or stone. The surfacing materials provide a finished look.

Ballasted roofing is a type of built-up roofing. The lower layers are not fastened or adhered to the roof structure. The surface layer will help the roofing stay in place.

Benefits of Using a Built-Up Roofing System


The amount of time that built-up roofing can last will vary. It will depend on your climate and the specific materials that are used. You can expect built-up roofing last between 15 and 30 years. However, there are some materials that can last over 40 years.

One of the reasons that built-up roofing lasts long is because it has excellent waterproofing. It is also resistant to sun damage because it has ultraviolet protection.


Every type of roofing will require maintenance. However, built-up roofing does not require a lot of maintenance. It will likely need a fresh coating every four to six years. You will also need to have your roof inspected at least once a year. This type of roofing can help you save a lot of money on maintenance.


The roof material has coatings that can reflect sunlight. This will make it easier for the building to stay a consistent temperature. You can save money on your heating and cooling bills.

Are There Any Cons of Having a Built-Up Roofing System?

Built-up roofing can be tricky to install. That is why it is important for you to have it installed by a professional commercial roofing contractor.