We were founded by Guy M. Nielson in 1935 in Pocatello, Idaho, and over the last 80 years, our work has not gone unnoticed. We are now nationally recognized refractory contractors, and we are continuing to grow. In 1935, we began as structural masonry installers completing commercial, institutional, and residential projects. As the industry leader in the area, we completed projects for several major clients, including Monsanto, J. R. Simplot, FMC, and the sugar and potato processing plants in the area.

Guy Nielson Company has supplied and installed a wide range of high temperature insulation. Our range of insulation includes Ceramic Modules, Ceramic Blanket, Ceramic Bulk Wool, Pumpable and Moldable Ceramic Fiber, as well as Board and Paper Insulation. Guy Nielson Company also has the specialized equipment necessary to install unique insulation linings. We have fluid pumps necessary to stop hot spots in your operation without the need for unnecessary operation interruptions. Guy Nielson Company can also supply and install a wide range of Insulating Castables and Gunite Materials for your industrial applications.