install, repair or replace built-up roofing systems using asphalt and hot ashpalt and gravel
install, repair, or replace single ply roofing system using waterproof shet materials such as modified plastics, elastomeric or toher asphaltic composition
instal sheet metal flashiings
apply waterproof coatings to concrete or other mansory surfaces below orabove ground level
install, reapir or eplace shes, shakes and other roofing tiles on sloped roofs on buildings
set up scaffolding to provide safe access to roofs
install and repair metal roofs using hand and power tools