Dallas, TX Roofing: 3 Commercial Waterproofing Systems to Consider

Waterproofing is a critical requirement for any commercial roof. Without it, it’s possible for the roofing system to leak—or worse, collapse due to water damage. Such is the risky possibility for every commercial roof, and those in Dallas are no exception.

In waterproofing a commercial roof, a sealing material is typically used. Commercial roof sealants can be made of certain materials, three of which will be discussed below. Knowing the different sealing materials will help broaden your knowledge about waterproofing, so you can better understand the work that will be done on your commercial roof by Dallas, TX roofing companies.

Dallas TX Roofing 3 Commercial Waterproofing Systems to Consider


Tar is derived from the distillation of trees and roots, and has been used extensively for centuries to waterproof not only roofs, but boats and ships as well. In a tar-and-gravel roof, hot tar is alternated with three or more plies of waterproof material, then ballasted by a layer of stone gravel. There are plenty of tar roofing products in the market, and each comes with a set of instructions so they can be applied properly.

Modified Bitumen

Modified bitumen is derived from asphalt. To make this product, asphalt is mixed with atactic polypropylene for rigidity or styrene butadiene styrene for elasticity. There are two general types of modified bitumen roofs in the market: peel-and-stick, which is attached to the roof as you would a sticker, and torch-down application, which requires the use of a torch to melt the bitumen and make it stick to the roof. Modified bitumen products typically come in the smooth-surface variety, although granule surfaces are also available.


Ethylene propylene diene monomer, or EPDM, is a synthetic rubber. It is significantly stronger than ordinary rubber as it can be stretched way longer, and it returns to its normal size without any sign of deformation. EPDMs can be sprayed onto a roof or applied in sheets of varying thickness. Sheet type EPDMs are attached to the roof via fasteners, stone gravel ballast, or glue.

Each roof waterproofing option comes with pros and cons, so you’ll need to choose wisely. A consultation with a reputable Dallas commercial remodeling professional will inform you of the best choice for your building and other specific roofing needs.

(Source: The 4 Kinds of Flat Roofs, This Old House)