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Why You Should Insulate Your Attic?

January 29, 2015

In Canada, heating a home in the winter, and cooling a home in summer can be an expensive proposition - unfortunately, we live in a climate of extremes.And while its true that heating and cooling costs can be moderated by adjusting the thermostat, proper insulation is a much better option, both in terms of cost savings and home comfort.Indeed, properly insulating the attic is one of the most effective ways to keep energy consumption in check and energy costs down.Industry statistics show that a well-insulated attic can save 10 - 50% on energy bills.

For some, an energy audit might be a good first step for insulating the attic.It can show the difference between how the attic insulation is performing today and how it could be improved and enhanced for the future.Quite often, the results of a comprehensive audit are surprising, and the potential for improvement is eye opening.As an example, for the typical homeowner, seasonal utility savings could well pay for the upfront cost of insulating the attic.And along with cost savings, come noticeable improvements to indoor environment and home comfort.

Evaluating the current condition of the attic insulation is essential.You can probably go up, look around, and take a wild guess on the status quo.But a professional will know better - an insulation professional can estimate existing R-Values, and can accurately assess the physical condition of the space.And although a contractor is looking for new business, the reputable company will advise what's in the best interest of the homeowner.For example, insulation that is compressed, or water-stained, or moldy MUST be replaced - there's no other way.

Another assessment that is critical for the attic is the prevalence of leaking air - every hole, opening, gap and crack allows for heated air (or cooled air) to escape.It makes the insulation useless, regardless of how much R-Value you install.And the truth is, sealing the attic is no small feat - if it's a quick fix effort, it will deliver quick fix results.A proper sealing effort, performed by a professional, will deliver the best results - the attic insulation will perform to its potential and the long term energy savings and cost savings will be measurable.

According to industry reports and statistics, insulating the attic is the most important thing when trying to make a home more energy efficient.The right insulation product, along with an expert installation can deliver significant cost savings from one season to the next.Again, a reputable insulation contractor will be able to recommend the right insulating product for the job, and the best installation approach to suit the need.Above all, attic insulation is best left to a professional - someone with extensive product knowledge and installation expertise.

In an ideal situation, the best insulation approach for a space like the attic is a combination of two products:spray foam insulation AND "blown-in" insulation.This is a dual-purpose effort, which SEALS and INSULATES the space at the same time.A good installer will ensure that both products work together properly, and deliver optimum results - in other words, energy and cost savings that are significant throughout the year.And since the attic space is the most critical part of the home to insulate, why not do it right the first time?

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


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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™.


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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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