Ontario's Insulation Leader Since 1980

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Welcome to Great Northern Insulation Oshawa

At Great Northern Insulation, customers are assured of the most professional, experienced staff in the industry. For residential or commercial needs, GNI offers the best in the industry – from sales, to estimating, to installation, to technical support. More than that, GNI offers an unwavering commitment to quality. In short, it’s our company’s assurance of 100% customer satisfaction.

Financing As Low As $13/month OAC!

It's the perfect time to invest in your home comfort with our new and improved financing. We've partnered with Financeit to offer you an affordable monthly payment option for your next investment in the energy efficiency and comfort of your home. It's now easier than ever to make your home feel like new again.

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Proudly Serving Oshawa and Surrounding Areas

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