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Keep Your Cottage Comfortable All Year Long

January 24, 2017

More and more people are choosing to use their cottages right around the year. It makes sense, especially in regions where "four-season" recreational activities can contribute nicely to lifestyle options. At the same time, making use of a cottage property throughout the year means making it comfortable - and in most geographic regions, that means insulating the living space. After all, three out of four seasons will likely require additional indoor comfort. Insulating a cottage is mainly about keeping the heated air indoors, and blocking cold air from infiltrating. But there's more to the job than just blowing insulation into an attic. Doing it right is about sealing AND insulating, the two elements necessary to ensure comfort, energy efficiency, and insulating performance. For the professionals, doing it right from the start makes for better long-term results, and without the need re-vamp or re-work over time. Similar to a city home, a cottage suffers from air leakage through the roof and walls. For the most part, a conventional summer cottage will suffer dramatically, because the roof and walls are just not insulated (let alone sealed). As a remedy, professional insulation contractors are suggesting spray foam products to BOTH seal AND insulate a cottage. With a single application, spray foam provides an air barrier and vapour barrier, along with superb R-Values. For a traditional cottage, spray foam makes sense as an all-in-one application. A professional install can effectively seal and insulate everything from the roof rafters, to the walls, to the floor. Strategically applied, spray foam can also weatherproof windows and doors and prevent serious air leakage. No other product will seal a space better than spray foam - particularly when dealing with all of the gaps and cracks in a building structure (cottage or home). For professional installers, spray foam is simply a superior product. For a cottage, the enhanced thermal protection will maximize energy efficiency. It means that less energy will be consumed, especially with winter heating, and therefore utility costs will be less. In addition, good insulation protects the plumbing pipes, the kitchen appliances, and the windows and doors. In short, the cottage will not require any annual "winterizing" until the next season. With a spray foam approach, a number of benefits are achieved (and in a single application). The cottage is completely air-sealed. Air moisture is controlled, and prevented from gathering. And R-Value is enhanced significantly. With an expert install, spray foam insulation contributes to an indoor environment that is comfortable from season to season, right around the year. It's another step closer to using the cottage year round, and enjoying it fully. Spray foam will outperform and outlast other products on the market. The finished space doesn't need topping up over the years, and doesn't need to be replaced or replenished. But it does have to be done right - and it's not work that should be expedited as a weekend DIY project. Spray foam should be installed professionally, and managed by experts who are experienced with both the product and the complexities of installation.

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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