Hot Mopped Rolled Roofing

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Hot mopped rolled roofing. It involves spreading a layer of hot asphalt on the base layer of the roof. If done well these systems are durable and easy to repair if a leak forms. The asphalt is applied to the roof using a heated mop. A built up hot mop roof consists of layers of felt and asphalt over a bed of rosin paper.

Some materials including rubber epdm and tpo roofing are all subject to expansion and contraction which means they shrink and grow in heat and cold. With a base sheet plus three layers you can expect from 600 850 a square depending on installation requirements. To begin the hot mop process a layer of hot asphalt will be spread on top of the roof s base sheet. At the same time a 90lb felt or modified bitumen cap sheet which is a type of asphalt that is modified with rubber or fiber is applied onto the hot asphalt.

Hot mopped roofs are durable low cost options compared with others types of roofs. This roof is actually an arrangement of various layers of felt and asphalt finally topped off with a layer of gravel. This may sound simple but there many different possibly hundreds of variations of built up and hot mop roofing. Proposal 1 is a hot mop system with all new flashings and two part foam tile attachment.

To install torch down roofing roofers roll out sheets of a bitumen containing material. The pros of the hot mop option. It s also called hot mop roofing or built up roofing because of the techniques used. This is where the professional commercial roofing company is at their most valuable.

This can be accomplished by picking up the roll at each end and at the outside edge turning it over and setting it immediately onto hot mopping asphalt. A modified bitumen cap sheet is then applied to the asphalt and both layers are nailed to the roof. However a high quality peel and stick underlayment will probably outlast hot mop. Flashing is used around roof features as required.

The more seams you have the more areas you have on the roof where the rolls could be pulling away from one another and causing potential leaks. Gaf liberty 3 ft. 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 roofing cost vary depending on the quality and layers of roofing you are having applied.

They are designed for roofs with shallow pitches where the rise is no more than 4 inches in every 12 inches. The hot asphalt is laid out evenly with a large heated mop over the surface. For hot mop application solidly mop the full width of the sheet to be covered including the lap in roofing asphalt.