facade work and insulation of a multistory building. professional construction workers on the scaffold elevator insulated wall fac

architecture builder building construction crane efficiency elevator energy equipment exterior external fac facade harness heat height helmet high home house improvement industrial industry installation installing insulate insulated insulating insulation laborer lifting male man material mineral multistory old outdoor panel polystyrene professional protection renovation repair rock roofers safety saving scaffold scaffolding site styrofoam technology thermal wall wearing wool work workers