Operative Plasters & Cement Masons International Association of the United States and Canada Plasterers mix and apply coats of standard and decorative plasters both inside and out. Cement masons smooth and finish exposed concrete surfaces on projects such as walls, floors, steps, sidewalks, driveways and roads. The bulk of the work is in commercial and industrial buildings.

Plasterers apply and finish exterior and interior cover coat materials to building surfaces which include shaping and sticking foam pieces by adhesive or mechanical installation; spray or troweling of fireproofing materials to steel beams, columns, and underside of metal decking.

Cement masons install curb and gutters, sidewalks, footings, slabs and bridge decks on commercial and public works projects; install driveways, lead walks, steps, and patios on new commercial and residential developments.