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Attic Insulation Is Worth Doing Right The First Time

January 18, 2016

In most of Canada, and much of the northern United States, weather extremes are the norm. These are regions where residential homes require heating in the winter and cooling in the summer. And because energy costs are usually rising, energy efficiency is vital in keeping utility bills down. Bottom line, energy efficiency is reliant on proper insulation. So in a space like the attic, choosing the right insulation products and installation methods is essential for success. Attic insulation should not be about packing the attic with enough insulation to fill the space. In fact, overdoing insulation in the attic may affect ventilation in a way that disturbs air movement, and defeats the whole purpose of insulating. At the same time, any professional will assert that sealing the attic properly is essential to the insulating process. It means that all holes, gaps and cracks must be completely sealed so that the insulation barrier performs to the max. While its true that a DIY approach to attic insulation is promoted by many home centers, the typical homeowner is actually disadvantaged - product knowledge is weak and installation expertise is lacking. On the other hand, the professionals understand the insulation product being installed, and are well acquainted with the installation techniques that will deliver the best possible results. Whatever the approach, attic insulation is best installed by an expert. Depending on the product being installed in the attic, there may be a need to install a vapor barrier prior to insulating. This is critical for moisture control and is particularly important in a space like the attic. Here again, an experienced insulation contractor will install the right product with the proper application - it's an approach that will ensure optimum outcomes for the long term. Indeed, hiring a professional far outweighs the savings of a DIY (do-it-yourself) job. Choosing the right attic insulation can be a challenge. Every product on the market is advertised as the best, and every contractor in the neighborhood is the finest. The truth is, a good insulation professional will provide the homeowner with the essentials: top-quality insulation products; superior installations; superb customer service; and warrantied workmanship. Its with this type of approach that an attic insulation project is done right the first time. Done properly, a professional attic installation ensures effective insulation, improved air circulation, and enhanced home comfort. More importantly, energy efficiency throughout the home translates into measurable savings on heating and cooling costs throughout the year. In short, attic insulation is one of those home improvement projects that provides short-term homeowner benefits and long term dollar savings - initial project costs can easily be "paid down". Whatever the choice of product or installation, attic insulation is best handled professionally. Large project or small, everything depends on effective sealing, proper ventilation, and appropriate insulation. And for the professional contractor, its a "system" that works in tandem, and ensures the maximum in energy efficiency. After all, saving on ever-increasing utility costs is primary.

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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