About Us

About Us

Thunder Bay Insulations LTD has been serving Thunder Bay and the surrounding area for more than 36 years. The company began in 1978 with Mike Kohanski as president. In the beginning years Thunder Bay Insulations was a small mechanical insulation company. Over the years the business has developed into North Western Ontario’s number one insulation service provider, offering a full range of insulation options to commercial businesses and individual homeowners.

We are committed to quality workmanship, service and above all safety. Thunder Bay Insulations is presently owned by Sean Kohanski and Leah Kohanski, son and daughter of Mike and Violet Kohanski.


"Growing up in the insulation, building industry gives me the experience and expertise to appreciate insulation practices of the past and strive for more energy efficient building, heating and cooling systems.

At Thunder Bay Insulations we are proud to provide and apply the latest and best techniques for installing insulations of all kinds."

Sean Kohanski
Thunder Bay Insulations President
Mechanical Mechanical