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Commercial Exterior Wall Insulation - Why It's Important Especially in the Summer

June 12, 2016

Once specified (or recommended), Spray Foam Insulation is the most effective and efficient application for exterior wall systems. Delivering maximum energy efficiency, moisture control, and airflow management, spray foam provides more benefits and advantages than any other comparable product. Applied into exterior wall cavities, or installed as a continuous insulated wall system, there is no better approach to wall insulation. In fact, in most climate zones, building code requirements now specify continuous insulation wall systems as requisite. As a continuous insulation wall system, Spray Foam Insulation will provide superior performance in an all-in-one application. For commercial purposes, SFI seals wall penetrations air tight like no other product or combination of products. Additionally, overall installation costs are lower than other options, entailing less labour and far less material waste. Most importantly, SFI coats and covers entirely - enveloping every void and cavity that might provide an opportunity for energy drainage. For curved, irregular, or uneven surfaces, no product can cover like SFI. When installed as a continuous insulated wall system, Spray Foam Insulation adapts effortlessly to practically any architectural approach, unique or otherwise. With other product applications, there are persistent issues with air leakage and moisture control. Not so with SFI. As well, spray foam is unrivaled in sealing small wall penetrations and joints, not to mention insulating odd and awkward spaces. The biggest advantage, of course, is that spray foam is an all-in-one application - a one-time installation that will never require replenishment or replacement. The big promise with Spray Foam Insulation is energy efficiency performance. This is particularly vital during summer, when cooling demands are at peak. With inadequate insulation, a typical commercial building experiences significant loss of conditioned air through various penetrations. But with spray foam, the building envelope is sealed tight - air leaks are effectively blocked, the accumulation of moisture is effectively prevented, and indoor temperatures remain consistent with less stress on HVAC systems. All of it contributes to sizable, ongoing energy savings. At Great Northern Insulation, building envelope upgrades (commercial and industrial) are key to reducing energy costs. Properly executed, an upgrade that integrates Spray Foam Insulation will significantly reduce energy consumption through the year. And for GNI, one of the most critical aspects is the return-on-investment (ROI) on such projects. As such, the experts at GNI employ advanced computer technology to assess every commercial insulation project, recommending an approach that will deliver the best benefits and financial returns over the long term. For GNI, it's all about building science - identifying and resolving air leakage paths; determining R-Values that will deliver the optimum in performance; and pinpointing moisture drives so that moisture-laden air can be better managed. In commercial buildings, controlling air leakage is the single most important strategy with respect to enhancing energy efficiency. This is precisely why Spray Foam Insulation has become integral to the professionals at Great Northern Insulation. The short-term benefits speak for themselves; the overall project investment is cost effective; and the long term savings on energy costs make economic sense.

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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