This is definitely a professional only roofing category.
Rolled hot mop roof.
A built up hot mop roof consists of layers of felt and asphalt over a bed of rosin paper.
Flashing is used around roof features as required.
Reflective gravel or a cap sheet limits sun damage and improves the roof s appearance.
The asphalt is applied to the roof using a heated mop.
It involves spreading a layer of hot asphalt on the base layer of the roof.
This hot mop roofing application is seen almost entirely in commercial buildings.
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.
It s also called hot mop roofing or built up roofing because of the techniques used.
In the past most commercial buildings and other flat top structures including homes were topped with tar and gravel roofing.
This roof is actually an arrangement of various layers of felt and asphalt finally topped off with a layer of gravel.
To install torch down roofing roofers roll out sheets of a bitumen containing material.
The pros of the hot mop option.
Because of the fumes released by liquefying asphalt hot mopping contributes to smog production.
A modified bitumen cap sheet is then applied to the asphalt and both layers are nailed to the roof.