Work with raw materials to build houses and other buildings.
Sprays roofs, sidings, and walls with urethane or polyurethane foam to bind, seal, insulate, or soundproof sections of structures: Flips switches to start generator, air compressor, and heaters. Turns nozzle on spray gun to obtain specified consistency of mixture. Directs foam onto surfaces, and determines thickness of foam, using probe. Connects hose of nitrogen tank to spray compound supply tank when spraying is completed, and turns valves to inject nitrogen into supply tank to prevent crystallization of compounds in tank.