In 1980, Great Northern Insulation began serving Southern Ontario offering spray foam insulation, blown in attic insulation, and sprayed in place acoustic and fireproofing fibres. Today, Great Northern Insulation has grown to serve all of Ontario providing an even wider variety of insulation and weatherization services. Five locations throughout Ontario over 160 full time employees 8 field superintendents providing pre and post inspection services certified thermographic services trained blower door technicians forensic building science capabilities EnergyStar trained sales staff D and AZ licensed professional truck drivers manufacturer trained and certified installers dedicated Customer Care department. While anyone can simply install insulation, we firmly stand by the statement that There is more to insulating than just adding insulation. When selecting an insulation contractor, evaluate your options based on their experience, product expertise, customer service and workmanship.