Hot Mopped Asphalt Roofing

To install hot mop roofing roofers lay a synthetic base layer top it with a felt layer then pour liquid tar on the roof and spread this sealing compound with a mop which gives the process its name.

Hot mopped asphalt roofing.

Hot mop roofing is a very dirty and somewhat dangerous job it s essentially putting molten asphalt tar over a roof. Hot mopped specifications manual. Comes with a warranty that is viewed as above average. Applying the hot mop in progress is the second step to a general re roofing process acting as a secondary barrier between dry materials and tiles.

Proposal 1 is a hot mop system with all new flashings and two part foam tile attachment. If the roof drains well its life span might be longer. It serves to protect the base sheet on your roof and keep it watertight. A modified bitumen cap sheet is then applied to the asphalt and both layers are nailed to the roof.

Hot mopped asphalt is applied at approximately 400 degrees fahrenheit. It s also called hot mop roofing or built up roofing because of the techniques used. Hot mopped roofs are durable low cost options compared with others types of roofs. This may sound simple but there many different possibly hundreds of variations of built up and hot mop roofing.

A built up roof is a multi layer low slope roof consisting of a base deck of metal plywood or concrete followed by a layer of rigid roof insulation and covered with alternating layers of roofi ng felt and hot mopped asphalt. To begin the hot mop process a layer of hot asphalt will be spread on top of the roof s base sheet. The hot asphalt is laid out evenly with a large heated mop over the surface. Hot mop underlayment is the traditional approach in florida.

However a high quality peel and stick underlayment will probably outlast hot mop. This roof is actually an arrangement of various layers of felt and asphalt finally topped off with a layer of gravel. A the average life expectancy of a hot mopped asphalt roof is 15 years. They are designed for roofs with shallow pitches where the rise is no more than 4 inches in every 12 inches.

With the elongation characteristics of sbs modified asphalt ideal for new roofing re cover applications and in the construction of flashings no coating required for class a rating from ul core mat is coated with an inherently fire retardant. It involves spreading a layer of hot asphalt on the base layer of the roof. The edge details are critical to the life of this type of roof. This hot mop roofing application is seen almost entirely in commercial buildings.

The asphalt is applied to the roof using a heated mop.