Since 1980 TSI has been on a mission to redefine the standards of home building. We recognized early on the importance of energy-efficient and the vital role it would play in modern construction. Over the years, we’ve grown from a small consultancy to one of Indiana’s most-trusted partners for builders looking to innovate, optimize, and make a genuine impact through HERS ratings, Code Compliance, Air-sealing, Inspections and Diagnostics.