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.

Trusted for 35 years
Industry Leading Professionals
Licensed & Certified
100% Satisfaction Warranty

Spray Foam Insulation in Oshawa

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Spray Foam Insulation in Oshawa

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Attic Insulation in Oshawa

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Attic Insulation in Oshawa

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Basement Insulation in Oshawa

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Basement Insulation in Oshawa

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Insulation Removal in Oshawa

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Insulation Removal in Oshawa

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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

Great Northern Insulation - Better Business Bureau Profile.

GNI is the Authorized & Trusted Insulation and Air Sealing Installer for Lowe’s

Energy Saving

Energy saving and energy efficiency is easier than one might think. Great Northern Insulation helps to identify performance issues, while taking advantage of improvement opportunities.

100% Canadian

Great Northern Insulation is recognized as Canada's largest full-service insulation contractor. GNI is 100% Canadian owned, proudly serving Ontario customers since 1980.

Do it right the first time
- with foam masters^TM

WALLTITE® ECO™ is a high-performance system, professionally installed by certified and approved specialists. Its C.C.M.C. approved (Canadian Construction Materials Centre) - with product quality guaranteed - and with installation by highly trained experts with the technical know-how to do the job right, the first time.

Best of 2017

From reputation to responsiveness, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thanks to everyone for the great ratings!

Best of 2018

For the second year in a row, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thank you again to everyone!

The GREENGUARD^®
Gold Certification promise

GREENGUARD^® Gold Certification ensures the strictest criteria for low-level chemical emissions. Certified products are safe for individuals with sensitivities (children/elderly) and safe for use in school environments and health-care facilities. The product certification is widely recognized by the LEED Rating System (Leadership in Energy/Environmental Design).

Insulthane® Extreme

For the ultimate in high performance spray foam insulation, Insulthane® Extreme is the professional choice for residential, commercial, and industrial application. With improved thermal performance over other products, Insulthane® Extreme has an exceptionally low Global Warming Potential (GWP). Considered environmentally friendly, this next generation spray foam insulation is non-ozone depleting, and exceeds specifications of other HFC product alternatives.

ECOLOGO^TM:
Multi-attribute product certification

ECOLOGO^TM is an accredited sign of environmental performance – holistic – green – sustainable - and compliant with strict, third party standards. Life cycle criteria for product certification may include manufacturing and operations; health and environment; product materials and performance; and product innovation, development, and management.

3M^TM products.
Quality + Performance = Savings

3M^TM energy-saving products are designed to keep warm air in, and cold air out, while keeping energy bills down. Products optimize energy efficiency in buildings and homes; improve indoor environment for occupants; and effect the reduction of seasonal energy costs. 3M products are authorized for LEED credits (Leadership in Energy/Environmental Design).

Baeumler Approved^TM
Professional, Certified and Insured

Baeumler Approved^TM gives you peace of mind when connecting with contractors, trades and home service providers. All Baeumler Approved members have demonstrated high quality work for customers and other trade professionals. Members must also have Workers Compensation, liability insurance of at least $1,000,000 and prove professional certification.

Holmes and Holmes

Mike Holmes and his son Mike Jr. (MJ) convert MJ’s bachelor bungalow into a two-storey home for MJ and his girlfriend Lisa. Choosing the newest materials and build techniques, the father and son team follow Mike’s famous motto – “Make it right.” The show can be watched on HGTV and DIY Network.

Enbridge Incentives

The Energy Conservation Program provides incentives of up to $1,600 to customers who achieve energy efficiency and fuel savings – and Great Northern Insulation can pave the way.

Great Northern Insulation proudly abides by a renovation-specific Code of Conduct set by RenoMark™.

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