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The Benefits of Ceiling Insulation

September 16, 2015

Experts in the industry agree that ceiling insulation is a cost-effective measure in ensuring energy efficiency. It will reduce heat loss in winter and heat gain in summer, and it will demonstrably improve indoor comfort, providing balanced temperatures throughout the house. Ceiling insulation, when properly chosen, and professionally installed, can provide annual cost savings on utilities that will make the project investment well worthwhile. Like any home improvement project, ceiling insulation requires proper management. And the priorities are straightforward: making sure that the space is fully sealed; choosing the right R-Value levels for the purpose; making certain that the insulation is expertly installed; ensuring that coverage is consistent and complete; and assuring appropriate ventilation. Clearly, ceiling insulation should be viewed as a system with various components. The attic floor covering a flat ceiling is one of the easiest parts of a building "envelope" to insulate. It's accessible, level and uniform. But ceiling insulation may also include cathedral ceilings, which will present some installation challenges. Either way, proper ventilation in the attic must be guaranteed so that air circulates and moisture is controlled. For ceiling insulation to perform at its maximum, ventilation needs to be part of the installation. Today, there are numerous products and installations used in ceiling insulation. Each has upsides and downsides, and each has a relative price tag. Somewhat conventionally, loose-fill insulation or fiberglass batts have been used in the attic. Here again, the basics of air leakage are common to all ceiling insulation efforts (especially for dropped ceilings). And the most important is to seal wiring, plumbing, light fixtures, and ventilating fans. The truth is, most insulation products do not stop airflow. This is particularly critical when it comes to ceiling insulation, because the attic is the worst place for air leakage. That's why many contractors are choosing to install polyurethane spray foam insulation. As ceiling insulation, it uniformly envelops the ceiling, roof and attic. It's the ultimate sealer, and will fully blanket crossbeams and roof joists; electrical and plumbing; and all of ductwork. For ceiling insulation projects, spray foam has proven to be a multi-purpose application. It creates an airtight space, it provides an effective vapor barrier, and it ensures the highest R-Value of any comparable insulation product. Spray foam insulation accommodates all of the concerns of ceiling insulation, and although the installation is somewhat more costly than other products, the long-term benefits, and the annual utility savings are well worthwhile. Contractors with extensive experience in ceiling insulation often offer a "hybrid" install for a more cost effective approach. The "hybrid" install combines spray foam insulation along with "blown-in" insulation. Both products work together and deliver excellent results. And beyond the cost effective approach, the main requisites of ceiling insulation are addressed: the space is airtight; moisture is controlled; and insulation potential is optimized. At the end of the day, a professional approach to ceiling insulation can guarantee home comfort, energy conservation, and lower utility bills 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

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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