Great Northern Insulation
GNI can help you Retro-Commission your House or Building to Meet Todays Standards and Codes.
At GNI, we service your project with the most experienced staff in the industry. Ongoing professional development is an obsession at GNI and we will not compromise at any level to bring to our customers the very best Installers, Sales Representatives, Customer Care Personnel, Field Superintendents, Estimating and Technical Support to your project. Great Northern Insulation is Canada's largest full service insulation contractor. Over the past 35 years our 100% Canadian owned and operated company has become the leader in the Home Comfort Industry.