Call Now1.800.265.1914

Common Insulation Defects Identified by an Energy Audit

May 16, 2016

Defects in home insulation are symptomatic - homeowners can feel the effects in every part of the home and from season to season. In some cases, there may be defects in the existing insulation, while in other cases, the installation itself may be defective. For the homeowner, it means rooms that are uncomfortable; heating bills that are high; and air conditioning that just doesn't cool. Symptoms or not, the best way to confirm a home's energy efficiency and the performance level of the insulation is to do an energy audit. A comprehensive energy audit will accurately assess how the home is using energy. And while suggested improvements are aimed at remedying the defects, the actual retrofit work must be planned and expedited to ensure optimum results. A professional energy auditor uses various tools and techniques to evaluate the air tightness, insulation value, and energy efficiency of a home. Quite often, thermal imaging cameras are used to provide important data: like areas of inadequate insulation; air leaks through walls, ceilings, and roofs; and moisture accumulation around plumbing and ductwork. Results are accurate. Amongst other tasks, energy audits are designed to identify pockets of missing insulation, while isolating areas of heat loss. Both of these indicate that insulation is insufficient. In fact, the results of a thermal image can actually determine where additional insulation is required or if existing insulation is installed inadequately. The findings are vital to making necessary improvements. In some homes, an energy audit can be quite revealing, showing serious heat loss where a roof meets the attic floor. Here, substantial heat loss may be a result of deteriorated insulation or even inadequate sealing of the roof cavity. Whatever the reason, the insulated attic is not preventing air leakage and is therefore allowing heat to escape in winter and creep in during the summer. Another common finding during an energy audit is gaps and openings that allow for air to flow in and out of the "building envelope". This is where effective sealing is suggested as a remedy, and where spray foam insulation is highly recommended to do the job. A spray foam application will seal every crack and crevice, providing maximum airtightness wherever the foam is applied. Energy auditors also find homes where blown insulation has settled and lost some of its R-Value. This is not uncommon in older houses, and may be common in newer homes where the materials were just poorly installed. Although adding more insulation may be a viable remedy, some audits suggest improvements to the overall ventilation of the space (more vents or better locations). Interestingly, energy audits often show that the HVAC system (heating/air conditioning) is not performing at peak. And although this may well indicate equipment problems, many insulation contractors find that once the "building envelope" is better sealed, better insulated, and better ventilated, the equipment performs better when heating in winter and cooling in summer. The real benefit of a good energy audit is the prospect of making improvements. And the results will quickly show in energy savings throughout the year.

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?

Please, enter a valid value

Incorrect values!