Call Now 1.800.265.1914

Retrofitting to Ensure Energy Savings

March 17, 2016

Home insulation is mainly about comfort - but it's also about energy consumption and energy savings. After all, an energy efficient house will dramatically reduce heating and cooling costs throughout the year. And with good insulation, those savings could be substantial enough to offset the cost of retrofitting. In fact, one of the best ways to reduce energy consumption in a home is to insulate the roof, walls and basement. For the professionals, these efforts are referred to as "building envelope retrofits". Beyond personal comfort, a well insulated home contributes to better energy efficiency in winter and in the summer. And with energy consumption reduced by 25% and more, long-term utility savings can make for a retrofit project that can be worthwhile investment. This is particularly true for homes that are older, where air leakage can seriously compromise insulation values. With a good insulation retrofit plan, and with a professional approach to air sealing and insulation, results can be impressive. "Building envelope retrofits" can be achieved from the exterior or interior of the home. Here, a reputable insulation contractor can recommend the product options and installations methods that would best meet the needs of the project. And while retrofitting from the exterior of the home has some advantages, doing the work from the interior will also deliver good results. Most importantly, whatever insulation approach is decided upon, it's absolutely vital to ensure air-tightness throughout the home. For the most part, older homes have limited insulation - attics usually have the minimum; exterior walls may not even be insulated; and basements have modest amounts. That's why a good insulation retrofit can make a difference - using a high quality insulation product; ensuring effective air sealing; and installing proper ventilation. Here again, a professional can assess weaknesses in the "building envelope" and can offer viable recommendations that will guarantee the optimum in energy efficiency. A good insulation retrofit will address what the experts call the "air barrier system". This is the system of building materials that resists air movement through walls, roofing, and even the foundation of the home. And while some of these materials do a good job resisting air movement, many do not. This is where sealing, weather-stripping and draft proofing can play a vital role in improving energy efficiency. And it's here that choosing the right type of insulation product will make a big difference. Today, many home improvement centers promote insulation products and techniques that are targeted at the DIY enthusiast. Many of the products are worthy, and the promise of cost saving is attractive. But with a home insulation retrofit nothing can compare with a professional contractor. Professionals have in-depth product knowledge. They have troubleshooting expertise. They have the installation experience. And above all, they have the know-how to recommend viable project options. Unlike some of the more cosmetic home improvements, an insulation retrofit benefits from the expert touch. The long-term results will be evident - with enhanced home comfort, improved energy consumption, and energy savings throughout the year.

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

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

Greater Toronto Area

2 Guided Court
Etobicoke, ON
M9V 4K6

TOLL FREE: 1-800-265-1914

GTA East

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

TOLL FREE: 1-800-265-1914

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

Niagara Region

25 Lincoln Ave
St. Catharines, ON
L2P 2C7

TOLL FREE: 1-800-265-1914


Great Northern Insulation - Better Business Bureau Profile.

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.


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

Trusted for Over 40 Years

Over 40 Years in Business

At GNI, we service your project with the most experienced staff in the industry. Ongoing professional development is an obsession at GNI and we will not compromise at any level to bring to our customers the very best Installers, Sales Representatives, Customer Care Personnel, Field Superintendents, Estimating and Technical Support to your project.

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

January, 2021 regulatory phaseout of hydrofluorocarbons (HFCs) with the introduction of WALLTITE CM01. Using hydrofluorolefins (HFOs) with lower global warming potential (GWP) compared to HFCs, WALLTITE CM01 is the next generation of spray foam insulation.



Heatlok® Soya HFOTM leverages Honeywell’s latest Solstice® Liquid Blowing Agent technology. This new hydrofluoroolefin (HFO) blowing agent is the most environmentally conscious blowing agent produced to date, with a zero ozone depletion potential (ODP) and a global warming potential (GWP) of 1, which is more than two orders of magnitude (99.9%) lower than HFCs used in this industry.


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).

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 Home Efficiency Rebate Plus program offers up to $10,000 in home reno rebates – and Great Northern Insulation can pave the way.


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


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?

Climatizer Cellulose


CLIMATIZER PLUS cellulose insulation is manufactured from a minimum of 85% locally-sourced post-consumer recycled newsprint. Non-toxic additives are applied to the uniquely fiberized paper generating a building material with superior thermal and acoustic properties, as well as exceptional resistance to fire, moisture, mould and pests.

Please, enter a valid value

Incorrect values!