A typical day may involve
Studying drawings, specifications and work sites to determine materials required
Erecting ladders and scaffolds
Placing and securing waterproof sheets over eaves
Nailing and stapling roofing underlay to roofs
Aligning starter rows of roofing material with edges of roofs, securing with wire, staples and nails, and overlapping successive layers of tiles
Sizing and cutting roofing material to fit around vents, chimney edges, corners and ridges
Fixing edge and ridge tiles in cement mortar
Slipping roofing material under prefabricated flashing and nailing it down
Caulking and flashing exposed nail heads to prevent leaks