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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

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

Greater Toronto Area

2 Guided Court
Etobicoke, ON
M9V 4K6

TOLL FREE: 1-800-265-1914

GTA East

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

TOLL FREE: 1-800-265-1914

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

Niagara Region

25 Lincoln Ave
St. Catharines, ON
L2P 2C7

TOLL FREE: 1-800-265-1914


Great Northern Insulation - Better Business Bureau Profile.

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

Trusted for Over 40 Years

Over 40 Years in Business

At GNI, we service your project with the most experienced staff in the industry. Ongoing professional development is an obsession at GNI and we will not compromise at any level to bring to our customers the very best Installers, Sales Representatives, Customer Care Personnel, Field Superintendents, Estimating and Technical Support to your project.

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

January, 2021 regulatory phaseout of hydrofluorocarbons (HFCs) with the introduction of WALLTITE CM01. Using hydrofluorolefins (HFOs) with lower global warming potential (GWP) compared to HFCs, WALLTITE CM01 is the next generation of spray foam insulation.



Heatlok® Soya HFOTM leverages Honeywell’s latest Solstice® Liquid Blowing Agent technology. This new hydrofluoroolefin (HFO) blowing agent is the most environmentally conscious blowing agent produced to date, with a zero ozone depletion potential (ODP) and a global warming potential (GWP) of 1, which is more than two orders of magnitude (99.9%) lower than HFCs used in this industry.


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).

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 Home Efficiency Rebate Plus program offers up to $10,000 in home reno rebates – 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?

Climatizer Cellulose


CLIMATIZER PLUS cellulose insulation is manufactured from a minimum of 85% locally-sourced post-consumer recycled newsprint. Non-toxic additives are applied to the uniquely fiberized paper generating a building material with superior thermal and acoustic properties, as well as exceptional resistance to fire, moisture, mould and pests.

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