Built-up roofing (BUR), also called “asphalt roofing”, is one of the most popular commercial roofing materials. It is often the most cost-effective and it is extremely durable. BUR is also very attractive and available in a variety of color choices. BUR gets its name from the multiple layers that are “built up” to provide protection to your building structure. Installing BUR is a challenge that should only be handled by experienced roofing professionals. Here is how BUR is installed.
Understanding The Different Layers Of BUR
BUR is built using multiple layers on top of the roof deck. The first layer is an insulation layer. The type of insulation used depends entirely on the needs of the building. The next layer is a vapor barrier. Vapor barriers are used to prevent water from moving around the roofing system. This reduces condensation and prevents water damage and leaks. On top of the vapor barrier is where the BUR truly begins. BUR is essentially layers of asphalt and ply felt built up. Usually there are 3-5 layers depending again on the needs of the building.
The BUR Installation Process
To apply these different layers, professional roofers use a technique called “hot mopping” using the asphalt. The asphalt mixture is first melted in a kettle. Then the ply felt is laid down to cover the entire roofing surface. Then the asphalt mixture is then mopped on the felt. This continues through the layers until the roof is fully built up. There’s also a cold-processing installation where instead of a hot mixture, an adhesive is applied. The type of installation used depends on a number of factors. It is best to consult with your roofing professional to learn more.
How Long Does BUR Installation Take?
The amount of time a BUR roof installation takes depends on a number of factors. First, if there is an existing roof, that roofing material will have to be removed before the BUR can be installed. Secondly, installation time depends on the size of the roof. A larger roof will obviously take more time than a small roof. Installation time also depends on the shape of the roof and the roof system. The more a crew has to work around unusual corners, shapes, or around utilities hardware, the more time installation will take. Finally, installation is impacted by the weather. Depending on the temperature and moisture in the air, the installation can take more or less time. Fortunately, a good roofing company will be able to give you a good estimate of the time involved.
If you are looking to install a new BUR roof, the commercial roofing experts at Gulf Tex Roofing and Services can help. We have over 45 years of combined experience installing BUR roofing. We’ll happily walk you through every step of the installation process and answer any questions. To get started, give us a call and we’ll come out and do a full inspection and provide you with a quote.