For nearly half a century, Great Northern Insulation has helped Ontario homeowners build or retrofit energy efficient, comfortable homes.
Whether you’re looking to replace old or damaged existing attic insulation with new, sustainable cellulose insulation, add highly efficient spray foam insulation to turn a previously unfinished basement into a livable space, or find out what the most environmentally-friendly insulation type for your new addition is, we can help.
For builders and contractors, Great Northern Insulation becomes an extension of your team. With a deep commitment to promoting building code standards today and innovation via PassivHaus and NetZero builds tomorrow, GNI is Ontario's building envelope solutions provider of choice.
