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It's Time to Assess if Your Home is Well Insulated and Energy Efficient

December 23, 2016

Sitting comfortably at home in a warm and cozy space doesn't necessarily mean that the house is energy efficient. And bumping up the thermostat for extra warmth isn't exactly wise energy use. In fact, most homes suffer from some type of inefficiency - mainly because cold air is creeping in, and warm air is escaping. Whether it's a drafty room, or an unusually cold wall, practically every homeowner can relate to these symptoms. Many times its about poorly performing insulation, but it's also about the many sources of air leakage found throughout the building "envelope". When a home is energy efficient, energy consumption is better managed, utility bills are lessened, and the home is comfortable from top to bottom. Conversely, homes that are not energy efficient are needlessly wasting energy and experiencing high utility bills. This is why a good assessment of the home makes sense - and why resolving poor performance actually makes economic sense. Most homeowners can readily identify the obvious symptoms of poor energy performance, but for more complicated problems, it pays to have a professional assess and evaluate at large.

Furnace constantly overworking

When the furnace is overworking, it's a sign that insulation isn't performing at its peak, and air is leaking in and out of the home. All of this is making extra demands on the furnace day-to-day.

Overly high seasonal heating bills

Higher-than-normal heating bills are an easy symptom to detect. What's difficult is to determine why - is it poor weatherization; failing or inadequate insulation; or just undesirable air leakage.

Hanging icicles and/or ice dams

For professionals, hanging icicles (or ice damming) are a definitive symptom of insulation that is under-performing. Here, attic insulation is either old and deteriorating or inadequately installed.

Indoor humidity or condensation

Moisture accumulation, including indoor humidity and condensation, is a sing of trouble. When unattended, this environment can propagate mould, leading to bigger issues beyond insulation.

Fluctuating room temperatures

Unsteady room temperatures are probably one of the most common symptoms for homeowners. Here, the reasons can vary from air leakage, to poor ventilation, to poor insulation performance. Attic or basement, improving the home's insulation is central to enhancing energy efficiency. And while comfort is definitely a benefit, the savings on seasonal utilities are even more meaningful. When professionally installed, high performance insulation is likely one of the best renovations a homeowner can undertake. With an expert touch, new insulation will radically decrease energy usage and lessen both gas and electric bills. But best of all, year after year, the dollar savings gradually offset the cost of the original installation investment. It's simply a win-win situation. Today, there are many government-initiated incentives designed to help homeowners expedite various energy upgrades and retrofits. From air sealing to insulation, it's an ideal opportunity to make improvements to energy efficiency, while taking advantage of cash rebates and incentives to offset the project cost. And with a reputable contractor on hand, homeowners can be assured of the best quality products, professionally installed.

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.

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