Value proposition

Great Northern Insulation is a full-service building envelope solutions provider and leader throughout Southern Ontario.

Founded in 1980, Great Northern Insulation is Ontario's leading building envelope service provider, for the new construction and retrofit markets across commercial, institutional, industrial, agricultural and residential sectors. Our vision is to build a better future by providing homeowners and builders with the products and services they need to help reduce their carbon footprint and build safer, more energy-efficient and sustainable communities. Headquartered in Woodstock, Ontario, Great Northern Insulation is trusted by some of Canada's largest and best-known construction companies and backed by Ironbridge Equity Partnership. To learn more, visit gni.ca.

Retrofit Drill and Fill, Spray Foam, Blown Fibre Insulation, Fibreglass Batts, Air Sealing, Vapor Barrier, Fire Protection, Insulation, Residential Retrofit, New Residential Construction, Commercial Retrofit, and New Commercial Construction