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5 signs your home needs insulation

October 19, 2021

Looking to make your home more comfortable and energy efficient this year? Replacing or upgrading your insulation can go a long way to making your space warm in winter and cool in summer - and keeping your house healthy. But how do you know when it’s time to call the insulation pros? Look for these 5 signs. 


1. High utility bills. 

If you’ve already invested in energy efficient appliances, but your bills are still higher than they should be in summer and winter, air leakage could be the culprit. Your warm (or cool) air could very well be sneaking out through a poorly insulated crawl space or attic, walls with old or pest-damaged insulation, inadequately insulated areas that house your mechanicals, you name it. There are lots of potential sources for heat loss. 

Ask us how we can find the air leak paths in your home. 

2. Your home feels drafty.

A sense of draftiness can happen even if your house is air-tight. In fact, there may be no actual “draft” coming in: the feeling could be caused by a cold, poorly insulated building envelope. When warmth leaves your body and tries to warm up the wall, that can give you the sensation of a draft. 

3. Cold floors. 

If you have a room that’s above an unheated garage or your floor is otherwise exposed to the outdoors, it can leave the floor – and the rest of the room – feeling uncomfortably chilly. This can be an indicator of damaged or insufficient insulation. Insulating that floor from below can make a huge difference in the comfort of a room, and it can be a particularly quick fix if the area below is unfinished. 

4. Melted spots on a snowy roof. 

Take a look at your house the next time it snows: if you see spots where the snow has melted, that’s a warning sign. Those melted areas tend to be the result of a heat source, air leakage or otherwise poorly insulated area, and indicate that heat is escaping through the roof. This issue can lead to more than just higher energy costs: melted snow and ice cause condensation in your attic, which can drip down into your insulation, compressing it and also leading to mold damage. 

5. Icicles along your roofline. 

These may look beautiful, but they’re a sign of heat loss and can cause a lot of damage. This phenomenon is called ice damming, and it happens when lost heat melts the snow on your roof, which then runs down the roofline and freezes. That ice is very damaging to aluminum and soffit: it can get heavy enough to rip an eavestrough right off. Ice buildup can also lift and get under shingles: as soon as it melts, that water will leak into your house and cause all kinds of damage. 


Is your home showing one or more of these warning signs? 

Talk to us! Book a consultation with a Great Northern Insulation specialist today to see how we can help you stay warm this winter. 

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).


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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.


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