Commercial Roof Installation Over Tar & Gravel – Watch Video

A Commercial Roof Installation

This Video explains the method of Installation of a Torch Down Rubber Roof over Tar and Gravel

Existing Old Hot Tar and Gravel Roofs

There are still some Old Tar and Gravel Roofs in existence. Instead of removing the old roofing system, a new Commercial Roof Installation can be achieved over the existing with a considerable cost saving.

Commercial Roof Installation: 2 Ply Rubber over Hot-Tar-and-Gravel

Our commercial roof installation of a 2 ply rubber roof, over hot-tar-and-gravel, has been tested and proven to withstand extreme weather, foot traffic, and harmful UV rays, for many decades. The system consists of a reinforced fiberglass asphalt base sheet, placed directly over the gravel, and fastened down with plates and anchors, to the roof. Over this fiberglass base sheet, we install a self-adhering membrane; this combination becomes our first ply. Lastly, we fuse a cap sheet of Modified Bitumen Torch Down Rubber to it, which has embedded ceramic granules on the surface, for protection against harmful UV rays.

Commercial Roof Installation: New Modified Bitumen Rubber (MB) over Old MB Rubber 

When a roof has an existing MB membrane, there is no need to remove it, instead, fusing an additional MB Torch Down membrane to it, creates a 2-ply rubber membrane.  The installation of this type of roofing system will reduce labor costs and provide a life expectancy of 40 years, and beyond.

Although a 2 Ply MB roof is the best roofing system, it can be compromised if roofing technicians do not have the experience and skills to perform the necessary flash detailing around mechanical units, drains, and vents. Most importantly, however, the entire surface of the membrane must be skillfully heat fused with a torch.

This video explains the Three Roofing Systems commonly used:

  1. TPO Vinyl membrane
  2. EPDM Rubber Membrane
  3. Modified Bitumen Torch Down

Modified Bitumen: Four Reasons to Install an MB 2 Ply Roofing System 

  • Embedded ceramic granules protect the membrane against harmful UV rays.
  • The membrane becomes five times thicker than a single-ply membrane (EPDM and TPO).
  • Seams are fused together with a propane torch creating a monolithic membrane.
  • It will withstand more frequent foot traffic and snow shoveling, than EPDM or TPO systems.

Commercial Roof Installation: A 2 Ply MB Roofing over any other Roof, is Cost-Effective

When an existing commercial roof needs replacement, the best system to install is a 2 Ply Modified Bitumen Torch Down Membrane. Not only can this two-ply system be installed over a Hot-Tar-and-Gravel Roof system, but it can also be installed over an existing EPDM Rubber Membrane, and a TPO Membrane,  making it cost effective.

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