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Getting Ready For the Hot Summer. Insulation Will Keep the Cool Air In

June 26, 2016

Most homeowners, especially in the northern climes, associate insulation with keeping the home warm and comfortable during the winter. At the same time, there's not much focus given to home insulation that keeps things nice and cool in the summer. In fact, when it comes to residential air conditioning, there's much to say for a home that is well sealed and well insulated. When a home effectively retains the cool air provided by the air conditioning unit, indoor comfort levels are maintained. And retaining that cool air (while keeping warm air outside) comes from a home that is well sealed and properly insulated. In short, cool air does not leak out and warm air does not come in. The result - the HVAC system performs with much better efficiency. Homes that are not properly sealed allow air to leak. In winter it's heated air and in summer it's cooled air - but in both cases energy is being wasted, and utility bills are overly high. Air leakage can also contribute to inconsistent temperatures from room to room. And here, it's wise to have the home professionally evaluated for air leakage, as well as possible remedy solutions. Today, many home improvement centres promote DIY solutions for insulation matters. While this approach might be money saving for a homeowner, a professional approach is much more preferable. This applies equally to checking for air leaks, removing aging insulation, or installing new insulation. As it is, the professionals have the equipment and expertise to do it right. Beyond sealing, it's inadequate insulation (or poorly installed insulation) that will cause a home to be energy inefficient. The HVAC system will run longer than need be to heat and cool the home, and utility bills will therefore be higher than need be. On the flip side, high quality insulation will ensure that the HVAC system operates at peak, saving money on heating and cooling bills. Generally speaking, insulation with higher R-Value will do a better job keeping cooled air inside, and keeping warmer air outside. This is particularly true when high R-Value is installed in attics and roofs. But it can also make a difference when basements and garages are well insulated. The idea, of course, is to create an effective air barrier that performs well in winter and summer. A sealed home also requires appropriate ventilation. When a home is well ventilated, the building envelope is allowed to breathe, providing much required air circulation. This has a positive effect on the consistency of indoor temperatures throughout the year, and again, allows for balanced performance of the HVAC system. This dynamic also contributes to better energy usage. At Great Northern Insulation, winter and summer comfort is about getting the home effectively sealed, suitably insulated, and properly ventilated. GNI professionals do it all - from home energy assessments, to insulation removal, to re-installation. GNI assures full customer satisfaction, with the highest quality insulation products, superior workmanship, and sound warranties.

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.


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.


Gold Certification promise

GREENGUARD® Gold Certification ensures the strictest criteria for low-level chemical emissions. Certified products are safe for individuals with sensitivities (children/elderly) and safe for use in school environments and health-care facilities. The product certification is widely recognized by the LEED Rating System (Leadership in Energy/Environmental Design).

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.


Multi-attribute product certification

ECOLOGOTM is an accredited sign of environmental performance – holistic – green – sustainable - and compliant with strict, third party standards. Life cycle criteria for product certification may include manufacturing and operations; health and environment; product materials and performance; and product innovation, development, and management.


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.

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