Hot Asphalt, a form of built-up roofing, has also been referred to as; hot mopped asphalt roofing, hot tar roofing, tar roofs, or multi-ply tar roofing. The traditional built-up roof system has been in existence for over 175 years. Asphalt, a petroleum by-product, is the major component of this system. A properly installed built-up roofing system, with four reinforced plies (4-ply), provides up to 280 mils in waterproofing protection and thickness. It’s ideal for roofs with foot traffic that need maximum protection. Mineral surface cap sheets can be installed with white acrylic applied directly to the surface in the factory so it can comply with the new building requirements. The redundancy in layers gives the added insurance of a long-lasting roof, which should remain serviceable for at least 25 years. If the white reflective coating is reapplied every 10 years or so, it could last indefinitely. The major advantages to an asphalt roof are;
- cost effective
- conforms easily to irregular decks
- fast to install
- extremely durable when properly applied.
All Pro® uses a crew of experienced applicators for proper installation of all hot asphalt roof systems. The main drawback to hot asphalt roofing, has been the odor. Low-fuming asphalt and additives that virtually eliminate fumes and odors are now available.
Installation: This is where the experienced professionals at All Pro® add the most value for you. You can apply built-up roofing over old built-up roofing or as the first roof on the deck. When applying it as the first roof a base sheet is used to protect the raw wood surface. The process involves melting blocks of asphalt in a large metal cauldron. From her, the mixture is either pumped up to the roof surface or spread out over the roof deck by the crew. This process is repeated with layers of felt and fiberglass in between until the desired thickness is reached.
Longevity: The average life of hot mop roofing is around 20 years but may last as little as 15 years or longer than 30 years given proper maintenance and conditions.