In 2025, after more than 40 years of serving Canadians from our original Woodstock, ON location, we relocated our headquarters to London, representing our commitment to growth and better serving our expanding customer base across Ontario.
Established in 1980, Great Northern Insulation has built a reputation as one of Canada's most trusted insulation services providers. For over four decades, we've been dedicated to helping homeowners and builders achieve superior energy efficiency and home comfort.
We maintain our commitment to serving all of Woodstock, London, St. Thomas, Brantford, Stratford and the surrounding regions, ensuring that our longstanding customers continue to receive the exceptional service they've come to expect from GNI.
