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The Importance of Insulating Your Cottage

October 24, 2016

Traditional summer cottages have little or no insulation, because in most climates, there's just no need. Warm summer temperatures don't promote much indoor moisture accumulation, and for the most part, everything is dry. For those who plan to insulate their cottage, and to use it during the winter months, there's much to consider. Keeping heat inside and cold outside is essential to indoor comfort, but there's also air moisture and condensation to take into consideration. The truth is, any contractor can blow insulation materials into an attic space or wall cavity. But this will be a short-term fix with short-term outcomes. This approach certainly doesn't address air leakage, and it barely deals with moisture control. Simply put, a top-notch job would include both air sealing and insulating - two elements that will ensure insulation performance, energy efficiency, and a comfortable indoor environment for occupants (both winter and summer). In any cottage or home, the roof and walls are major sources of air leakage. And needless to say, a traditional cottage suffers from both, since neither roof nor walls are adequately sealed and/or insulated. Today, professional contractors will highly recommend air-sealing a cottage with spray foam. It's the ultimate application, since it provides an air-barrier/vapour barrier in one install, while providing significant R-Values as an insulation barrier - ideal for summer and winter. The beauty of spray foam as an air sealer makes much sense for a cottage (as well as a residential home). Air sealing with spray foam effectively seals roof rafters, wall studs, and crawl spaces like no other application. It can also be used to efficiently weatherproof doors and windows where air leakage is pervasive. Indeed, nothing seals better than spray foam when it comes to the openings, holes, and gaps that are prevalent throughout a typical building structure (cottage or home). As insulation, spray foam is superior to other products. It provides high performance thermal insulation, while maximizing energy efficiency. And this means less energy consumption during winter and summer, and more reasonable utility costs. But this work must be done right, and any notion of a DIY approach to spray foam application should be carefully measured. It's work that should be professionally managed by those who understand the product and the installation. Spray foam accomplishes a number of important things in one application: it completely air seals a space; it blocks undesirable moisture from intruding and accumulating; and it provides R-Value beyond compare. When expertly installed, spray foam will create an indoor environment that's comfortable throughout the summer and winter. It outperforms other products, and never needs replacement or replenishment. Spray foam application is the way to do it right the first time. Weatherizing and insulating a cottage, regardless of the size, will ensure comfortable living year round. And when it's done right, the plumbing pipes don't have to be flushed; kitchen appliances don't have to be closed down; and the windows and doors don't have to be shuttered. It's the best approach for getting full use of the property, and enjoying the benefits to the max.

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

Southwestern Ontario

7035 Industrial Drive
Comber, Ontario
Canada N0P 1J0

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

GTA East

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

TOLL FREE: 1-800-265-1914

GTA & 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


259 Campbell Street
Sarnia Ontario
Canada, N7T 2H3

TOLL FREE: 1-800-265-1914

Niagara Region

6260 Don Murie St
Niagara Falls, ON
L2G 0B4

TOLL FREE: 1-800-265-1914


Great Northern Insulation - Better Business Bureau Profile.


Best of 2017

From reputation to responsiveness, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thanks to everyone for the great ratings! 

HomeStars 2018

Best of 2018

For the second year in a row, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thank you again to everyone!

Homestars Best of 2019 Award

Best of 2019

For the third year in a row, HomeStars ranked Great Northern Insulation at better than 95% for customer satisfaction.

Homestars Best of 2020 Award

Best of 2020

For four years now, HomeStars has ranked Great Northern Insulation at better than 95% for customer satisfaction.

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

Enenrgy Savers

Energy Saving

Energy saving and energy efficiency is easier than one might think. Great Northern Insulation helps to identify performance issues, while taking advantage of improvement opportunities.

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

WALLTITE® ECO™ is a high-performance system, professionally installed by certified and approved specialists. Its C.C.M.C. approved (Canadian Construction Materials Centre) - with product quality guaranteed - and with installation by highly trained experts with the technical know-how to do the job right, the first time.

Insulthane Extreme

Insulthane® Extreme

For the ultimate in high performance spray foam insulation, Insulthane® Extreme is the professional choice for residential, commercial, and industrial application. With improved thermal performance over other products, Insulthane® Extreme has an exceptionally low Global Warming Potential (GWP). Considered environmentally friendly, this next generation spray foam insulation is non-ozone depleting, and exceeds specifications of other HFC product alternatives.


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).


Baeumler ApprovedTM
Professional, Certified and Insured

Baeumler ApprovedTM gives you peace of mind when connecting with contractors, trades and home service providers. All Baeumler Approved members have demonstrated high quality work for customers and other trade professionals. Members must also have Workers Compensation, liability insurance of at least $1,000,000 and prove professional certification.

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 Energy Conservation Program provides incentives of up to $1,600 to customers who achieve energy efficiency and fuel savings – 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?

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