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When and Where Foam Insulation Should Be Used?

August 24, 2015

Foam insulation (referred to as spray polyurethane foam by the professionals) is an insulation product that is installed with a spray-application. The foam insulation is applied initially in the form of a liquid, expanding many times over, and hardening into place as an insulating envelope. This envelope creates an airtight space and prevents the movement of air, as well as the accumulation of moisture. Foam insulation also provides the highest R-Value (insulating value) compared to other insulation products. It's an efficient insulator that keeps heated air or air-conditioned are inside a building, and prevents hot air or cold air from leaking in. Foam insulation is effective in every part of the home (or building), and provides energy efficiency wherever installed. Most homeowners don't realize it, but 30-50% of heating and cooling bills are due to air leakage and/or poor insulation - that's quite a bit of wasted energy and wasted money. But with foam insulation applied, energy consumption is reduced and energy savings are achieved. In fact, where a project budget will permit, foam insulation can be installed in walls and ceilings; attics and roofs; floors and crawl spaces; and especially in basements. And results are noticeable when heating and cooling the home throughout the year. The benefits of foam insulation far outweigh other insulation products. And although the cost of product and installation are somewhat higher, the longer-term savings on energy bills make the project cost worthwhile. With foam insulation the whole idea is to provide optimum thermal efficiency, and that means insulating any space where energy can be lost. Ideally, whether it's the attic or the basement, it's preferable to apply foam insulation from top to bottom, edge to edge. But where a project budget doesn't allow, the next best option is foam insulation combined with another insulation product (the professionals call this a "hybrid" approach).

Attics, roofs, and above the garage

Foam insulation ensures that these spaces are airtight and highly insulated. Energy loss is restricted during winter and summer, and energy bills are therefore reduced. Foam insulation envelops an entire space, and in an attic, everything is completely sealed, including all gaps and holes, and all hard-to-reach spaces.

Interior/exterior walls and ceilings

Walls (exterior and interior) are especially suited for foam insulation. In fact, inside a home, even the walls between rooms can be sprayed with foam insulation - it allows for added insulation, sound dampening, and additional comfort. In some cases, foam insulation also contributes to the structural strength of the walls.

Basement walls, floors, crawl spaces

While basement walls are usually insulated, basement floors are often overlooked. In the basement, foam insulation is ideal - a good application will restrict air movement, inhibit moisture from accumulating, and will provide superior R-Value. And if the floor can also be insulated with foam insulation, it's even better. With a professional installation, foam insulation will provide more benefits than any of the other products on the market. It's a quality approach with a premium product. And although it may not suit all budgets, the long-term energy savings, along with the short "pay down" period, make the investment worthwhile.

Western Ontario

935 Keyes Drive
Woodstock, Ontario
Canada N4V 1C3

Phone: 1-800-265-1914

Fax: (519) 539-7946
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Barrie, Ontario
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Etobicoke, ON
M9V 4K6

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Toronto (Milton), Ontario
Canada L9T 5A6

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Nepean, ON
K2R 1H4

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Niagara Region

25 Lincoln Ave
St. Catharines, ON
L2P 2C7

TOLL FREE: 1-800-265-1914


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HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2022.


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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.

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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.


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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).

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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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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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