In 1977 a small custom sheet metal shop, known as Spring Branch Sheet Metal (SBSM) opened its doors with seven employees. After years of producing sheet metal products ranging from roof gutters to kitchen hoods, SBSM found a niche in the market of HVAC accessories. In 1983, the name Curbco was trademarked and the evolution began from local sheet metal shop to a nationally recognized supplier throughout the HVAC industry.