Call Now1.800.265.1914

Poorly Installed Insulation Can Be Dangerous

May 03, 2016

With home insulation, the right product and the right installation are absolutely fundamental for optimum performance. Hard to believe, but even contractors often fail to insulate properly, and the result is poor performance and sometimes even dangerous conditions. On the other hand, good contractors understand products, appreciate the elements of building structure, and have experience with the dynamics of ventilation and air circulation. In other words, there's far more to insulating than just filling a given space with product - and the results of the job will show. Plenty of energy audits point to situations where installed insulation is performing poorly: the wrong product has been installed; there is inadequate thermal insulation; or workmanship is just plain sloppy. Even in new construction, many installations have been found to be sub-standard, and these are projects that have actually signed up for energy efficiency programs, and even project grants. In short, many industry standards are just simply ignored: incomplete air sealing; improper coverage of wiring and plumbing; and inadequate insulation in and around skylights. The best insulation contractors will work to code. First of all, it's required. Secondly, it ensures the best outcomes for both product and installation. Sloppy installations are a code violation, not to mention the potential danger to the homeowner. Beyond that, whatever product is chosen for installation, it has to be installed according to the manufacturer's specifications - without taking shortcuts that will comprise the integrity of the project. Here again, it's not uncommon to find a so-called expert who is bypassing the building code and overlooking manufacturer specs. Like any home improvement project, doing it right the first time will ensure the best short term and long-term results. It means that a contractor should be recommending the most appropriate product for the job, making every effort to deliver the best value within a given budget. There's practically no way to achieve all this with a DIY approach - a typical homeowner just doesn't have the product experience or installation expertise to succeed. And while the dollar savings of a DIY project might be appealing, nothing can compare with a professional, comprehensive job. Even for those who think they know, installing insulation can be dangerous and can pose risks. For example, without proper personal protection, simply touching or inhaling insulation product can bring on skin or respiratory irritation. In contrast, professionals are decked out from head to toe. As for the installation work itself, most homeowners will not have the specialized equipment and tools required, making for a high-risk install with many pitfalls. Finally, a project of this kind should protect the residents during installation, something that's assured by expert installers. For contractors like Great Northern Insulation, product warranties and installation guaranties are a sign of project excellence. GNI installs only the best products on the market, ensuring that every installation meets established industry standards throughout. It's about delivering 100% customer satisfaction - so much so, that if newly installed insulation isn't performing, GNI will repair or replace without charge to the homeowner.

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!