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The Benefits of Blown Insulation

May 13, 2016

Blown insulation is a popular insulating product, widely used in residential applications. Usually available in two compositions (cellulose and fiberglass), the products deliver satisfactory results in the attic and roof cavity. Both compositions have comparable R-Values when installed, but the cellulose product has slightly higher R-Value. At the same time, cellulose has a tendency to settle, and this has a long-term effect on R-Value. Undoubtedly, there are upsides and downsides to each of the products - although a professional installation will assure the optimum in performance. Blown insulation products are manufactured to be fire resistant. With cellulose, the product is treated to impede fire from spreading. With fiberglass, the product itself is hard to ignite, mainly because of the glass fibre. Needless to say, the fire resistant element is particularly desirable for a space like the attic. As such, blown insulation is also recommended for "topping up" the existing insulation in the attic (provided the existing material is clean, dry, and uncontaminated). Clearly, this approach makes for a cost effective option when attic insulation requires enhancement.

Quite a quick installation job

Installing blown insulation is fast, when compared to other methods. With a professional install, the "thermal blanket" that is blown throughout will deliver satisfactory levels of R-Value.

Very good energy efficiencies

Blown insulation provides satisfactory energy efficiency where installed. Coverage is complete and comprehensive, filling many of cracks and crevices in the attic (although not 100% airtight).

Sound and noise dampening

With a good install, blown insulation can prevent noise from migrating from space to space. This could be of benefit to those who use the attic space or adjacent areas for work or recreation.

Energy savings every season

A properly insulated attic is well worth the project cost. Doing it right will stop heating and air conditioning from leaking, and will save on energy consumption and costs throughout the year.

Containing recycled content

Cellulose blown insulation is composed of recycled, shredded newsprint. The fiberglass product is made of glass fibres, much of which is recycled glass. For some, this is an important feature.

Complete, in-depth coverage

Professionally installed, blown insulation provides good coverage in an attic, blanketing all of the wooden crossbeams; the plumbing pipes; the electrical wiring; and even the television cables.

Overall longer-term benefits

In a typical residential install, blown insulation creates enhanced energy efficiency throughout the building - improved heating and cooling cycles, as well as enhanced HVAC performance. All things considered, blown insulation is a cost-effective application, with satisfactory insulation value, and an affordable budget commitment. However, these are products that require expertise during the installation process. It means that a professional approach is recommended - this will ensure peak performance for the product, and an installation that will deliver results for years to come. Good contractors do the job right - they follow the building code - they maintain schedules - and they stay on budget. And while the DIY approach might be inviting for some homeowners, the finished results of a professional job are far more preferable.

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


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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

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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.


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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™.


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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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