workers installing plywood sheeting on a flat roof

roof workers plywood sheeting construction building site work job project constructionworkers contractors industry industryworkers jobsite flatroof installing install newconstruction material lumber wood sheet sheets safety safetygear hardhat safetyvest tools equipment buildingsite labor constructionworker worker laborforce outdoor sunny daylight day shadows concrete grey buildingmaterials buildingsupply buildingtrade buildingindustry exterior flat roof generative