A technician walks along a roof and sprays it using a wand attached to a hose.
A technician walks along a roof and sprays it using a wand attached to a hose. the man
then bags a carpet of some sort and sprays it on the roof. then uses a vacuum and begin vacuuming the floor on the the roof. removes hoses and shakes the roof and cleans the wooden wall. turns off his hose then walks along the peak of the roof.