1.800.265.1914
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Homeowners: Residential Retrofit

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.

Attic Insulation

Attic Insulation

For most homeowners, attic insulation is a home improvement that is very often underestimated.

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Ice Damming Solutions

Ice Damming Solutions

To prevent ice dams, it 
is necessary to prevent roof snow from melting. This is accomplished by stopping heat transfer & air leakage through the attic floor and roof cavity.

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Thermal Barrier

Thermal Barrier

Thermal barriers are designed to delay the temperature rise of spray foam insulation during a fire and to further delay (or even prevent) the spray foam from being engulfed by fire. 

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Fibreglass Batts

Fibreglass Batts

Fibreglass Batts are an extremely common form of insulation made from extremely fine fibres of glass woven together into thick pads.

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Old Insulation Removal

Old Insulation Removal

At Great Northern Insulation, our assessment process will determine if, and to what extent, removal is required. We’ll make it easy to deal with, and with the least encumbrance on your lifestyle.

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Retrofit Drill and Fill

Retrofit Drill and Fill

The drill-and-fill process is an innovative and effective installation where existing walls (interior or exterior) require insulation upgrading. 

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 Cottage Insulation

Cottage Insulation

Properly weatherizing a cottage requires a comprehensive approach that includes air sealing and insulating - it’s really the only way to ensure optimum efficiency.

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Air Leakage Testing

Air Leakage Testing

A well sealed home, ventilated correctly, will balance the operation of the HVAC system (heating and cooling) and will noticeably improve the home’s energy efficiency.

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Spray Foam Insulation

Spray Foam Insulation

Spray foam insulation is widely recognized as the most versatile insulating product on the market today.

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 Basement Insulation

Basement Insulation

With Basement Insulation There Are: No More Drafts Or Cold Temperatures, Just A Comfortable Living Space.

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Thermal Imaging

Thermal Imaging

Today, thermal imaging has become an essential component of building diagnostics. Indeed, the extensive data that’s provided exceeds any other diagnostic approach.

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Exterior Insulation

Exterior Insulation

A good contractor provides the homeowner with an INSULATION SYSTEM – a system that maintains proper airflow, effectively manages the movement of moisture and allows for well-balanced ventilation and air circulation.

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The Stack Effect

The Stack Effect

The Stack Effect is a phenomenon that occurs in all types of buildings, but particularly in tall buildings.

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Weatherization

Weatherization

The overall goal of weatherization is to measurably reduce home energy consumption, and thus reduce home energy costs.

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Air Sealing Performance Package

Air Sealing Performance Package

Air sealing is one of the most important aspects of an effective insulation system.

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Client Feedback

GNI took care of everything I needed to have a more comfortable, energy-efficient home

Rating:

star star star star star

Reviewed by:

  Clare

Very professional and courteous. Greeted with a hand shake which is something that doesn’t happen all too often.

Rating:

star star star star star

Reviewed by:

  Aidan

Wow, just wow. First experience with Great Northern and I was and remain impressed with the experience

Rating:

star star star star star

Reviewed by:

  Patricia

GNI took care of arranging the energy audit beforehand so we could get a rebate on the work. The installers were quick, polite, and cleaned up after themselves!

Rating:

star star star star star

Reviewed by:

  Art
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

Sarnia/Lambton

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

BBB

Great Northern Insulation - Better Business Bureau Profile.

Homestars

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.

Homestars Best of 2021 Award

Best of 2021

HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2021.

Homestars Best of 2022 Award

Best of 2022

HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2022.

Lowes

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.

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.

3M

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).

Baeumler

Baeumler ApprovedTM
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

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.

Renomark

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

eRenovate

We are Verified & Bonded by eRenovate. When you choose to proceed with our services through their platform, you receive the gaurantees set forth through their program.

As Seen on Love It or List It

The GNI crew have been featured installing insulation on Love It or List It - have you seen our logo in an episode?

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