What Is A Built Up Roof System.

A built-up roof system is made up of three materials bitumen, felts and surfacing. The most popular bitumen are asphalt and cold tar.

Asphalt built up roofing system is a roof constructed with ply felts made with asphalt-impregnated fiberglass and mopping asphalt. The surface is a flood coat made up of asphalt and aggregate gravel, crushed stone, slag, or marble chips. Generally, these roofs consist of four plies of felt installed in shingle fashion. Asphalt is not waterproof and it depends on positive slope to maintain its integrity.

Coal tar built up roof is a roof constructed with plies layers of felt made with coal tar impregnated fiberglass and mopping asphalt. The surface of a coal tar pitch built up roof is always a flood coat of coal tar and aggregate such as gravel or crushed stones.

When the layers of a built-up roof are installed correctly, it creates a strong, water tight membrane. I can’t stress this enough that a built-up roofing system needs to be installed by a true licensed commercial roofing contractor.

The bitumen used to apply on these systems must be heated to the correct temperature. If the bitumen is too hot, the quality of the bitumen will be diminished. If the bitumen is not hot enough it will not flow as well when it is applied. If the material does not flow well, it will not adhere to the roof, and if that happens, the roof system will not last long.


We can save you plenty of time and money, protect your home as well. Don Schmidt Roofing would love to earn your trust and help you with your central Florida home/commercial roof repair or installation. Call us at 407.892.9884 today or contact us online at www.DonSchmidtRoofing.com. We are a local family owned business serving central Florida since 1988 and an Osceola county resident since 1959. Put your roofing project into the hands of a contractor you can trust.

Due to the overwhelming requests because of Hurricane Irma… Please call our office at (407) 892-9884 and leave a detailed message or send an email to jeff@donschmidtroofing.com.


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