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Save on Utility Bills with Double Glazed Storm Windows

February 05, 2018

As homeowners, we’re constantly looking for different ways to lower our expenses. Saving on seasonal utilities (heating and cooling) is one sure way to reduce expenses.  Installing double glazed storm windows in your home is the answer. While many older windows are single glazed, today there’s a way to retrofit existing window assemblies and save big on seasonal utility costs.

MAGNETITE storm windows provide noticeable benefits

MAGNETITE storm windows are retrofitted into existing window systems using a patented frame assembly. Every window is customized and fitted with a MAGNETITE window panel that’s snugly locked into place magnetically. The finished window is airtight, insulated, and sound proofed.

Sound Reduction

Because exterior windows are the biggest conductor of noise and noise pollution, it makes sense that double glazed windows would reduce that noise. With MAGNETITE storm windows, the double-glazing solves noise issues markedly. The problem with single-glazed windows is that they allow for air infiltration, and therefore noise infiltration. MAGNETITE provides a sealed window system that creates an insulated air cavity, and thus restricts air infiltration and noise. The window retrofit is designed to be a “secondary system” that buffers against noise transfer, while sealing against air infiltration. MAGNETITE is CSA® tested for almost zero air infiltration.

Home Comfort

Windows are known to be the biggest contributor of heat “gain” and “loss”. MAGNETITE window retrofits eliminate air leakage through windows, therefore decreasing heat imbalances in winter and summer. The result:  a more comfortable and sustainable indoor environment. MAGNETITE window frames use optical grade acrylic glazing – a product that is up to 6 times more thermally efficient than conventional glass. As well, with a PVC sub-frame, an airtight seal is created that eliminates draughts. The finished retrofit provides consistent room temperature and seasonal comfort throughout the year. And for many, this means a better night’s sleep going forward.

Energy Savings

Because of the thermal conductivity of window glass, it’s proven to be the biggest source of energy loss in a home, and the biggest waste of heating and cooling.  MAGNETITE storm windows simply save on energy by preventing energy loss. The double-glazing has a dramatic effect on energy savings - so much so that homeowners can recover their initial investment during the first 6 years. With MAGNETITE storm windows, less energy is wasted, and there is less demand on heating and cooling. It all contributes to utility savings throughout the year. MAGNETITE has been endorsed by the Canadian Mortgage and Housing Corp. and independently tested by CSA®.

Great Northern Insulation installs MAGNETITE window systems

Throughout southern Ontario, Great Northern Insulation installs MAGNETITE window systems for a wide range of residential homes. Incorporating MAGNETITE’s patented system, GNI installers customize every window retrofit. GNI assesses customer needs, recommend a cost-effective solution, and installs a new window system that is guaranteed to perform. To find out more, contact the home energy experts at Great Northern Insulation by calling 1.800.265.1914 or by visiting the company website at www.gni.ca .

Western Ontario

935 Keyes Drive
Woodstock, Ontario
Canada N4V 1C3

Phone: 1-800-265-1914

Fax: (519) 539-7946
TOLL FREE: 1-800-265-1914

Southwestern Ontario

7035 Industrial Drive
Comber, Ontario
Canada N0P 1J0

TOLL FREE: 1-800-265-1914

Muskoka, Haliburton, Northern Ontario

1027 Elwell Park Road
Gravenhurst, Ontario
Canada P1P 1R1

TOLL FREE: 1-800-265-1914

Central Ontario

29 Ferndale Industrial Drive
Barrie, Ontario
Canada L4N 9V5

TOLL FREE: 1-800-265-1914

GTA East

103 North Port Road
Port Perry, Ontario
Canada L9L 1B2

TOLL FREE: 1-800-265-1914

GTA & South Central Ontario

450 Industrial Dr,
Toronto (Milton), Ontario
Canada L9T 5A6

TOLL FREE: 1-800-265-1914

Eastern Ontario

1035 Moodie Dr #1,
Nepean, ON
K2R 1H4

TOLL FREE: 1-800-265-1914


259 Campbell Street
Sarnia Ontario
Canada, N7T 2H3

TOLL FREE: 1-800-265-1914

Niagara Region

6260 Don Murie St
Niagara Falls, ON
L2G 0B4

TOLL FREE: 1-800-265-1914


Great Northern Insulation - Better Business Bureau Profile.


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! 

HomeStars 2018

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!

Homestars Best of 2019 Award

Best of 2019

For the third year in a row, HomeStars ranked Great Northern Insulation at better than 95% for customer satisfaction.

Homestars Best of 2020 Award

Best of 2020

For four years now, HomeStars has ranked Great Northern Insulation at better than 95% for customer satisfaction.


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

Enenrgy Savers

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

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.

Foam Masters

Do it right the first time
- with foam mastersTM

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.


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

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.


Multi-attribute product certification

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3MTM products.
Quality + Performance = Savings

3MTM 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).


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Professional, Certified and Insured

Baeumler ApprovedTM 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

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.


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