It will be most convenient to cover the roof together, one person will heat the mastic and roofing material, and the second to roll or nail the already heated roofing material to the roof. Warm up roofing material using a gas burner. You should not immediately heat a large section of mastic, because you will not have time to do the work, and the mastic will cool down. The material must be warm from the side where there is a film that will show you when it will be warmed up with white and burn. It is not necessary to overdo it with the heating, because the roofing material may melts to the holes.
