How Do You Hot Mop a Flat Roof

When the time comes to re-roof your home, the hot-mop option is a common one. It involves spreading a layer of hot asphalt on the base layer of the roof. The asphalt is applied to the roof using a heated mop. A modified bitumen cap sheet is then applied to the asphalt and both layers are nailed to the roof.?

How do you hot mop a roof?

Use a fabric roofing mop to lay up the roof, from lower elevation to high. Apply asphalt to the base sheet, then building felt, then asphalt. Repeat for three layers (four including the base sheet). The felt should be staggered similarly to the base sheet application, shingle style, using two-thirds coverage.

Is hot mop roof good?

Hot mop roofing is considered to be the most effective way of covering a flat or low-slope roof. The result is an impermeable, multi-layered roof covering that will last for up to 15 years—longer if the roof is laid with good drainage that avoids puddling.