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The Benefits of Insulating Multi-Unit Residential Buildings

May 03, 2016

The benefits of insulating a multi-unit residential building are basically bottom-line benefits, with residents and owners both saving money. For the most part, this is work that will require the services of a professional insulation contractor. It's work that requires expertise with building structures, and with high performance insulation products. To ensure the best long-term results for the life of a MURB building, premium insulation products should be professionally installed.

Effective Sealing of the Exterior

Effectively sealing the building envelope (including doors, windows, and exterior joints) prevents air infiltration in cold weather and air leakage in summer. This will reduce seasonal heating costs, improve thermal comfort in apartment suites, and enhance the resilience of the building.

Sealing off Paths of Air Leakage

Spray foam sealants are ideal for blocking air leakage around window frames, floor seams, and electrical receptacles. Reduced air filtration (winter and summer) results in lower energy costs, as well as much-improved comfort for occupants. Proper ventilation should not be ignored.

Insulating around the AC Units

"Through-the-wall" AC units require proper sealing and insulating around the "sleeve". Here, the benefits are several: reduced air infiltration; reduced condensation; enhanced AC operation (less energy cost); less outside noise pollution; and decreased drafts, improving resident comfort.

Effectively Insulating a Floor

Floors that are exposed to unheated spaces can be very effectively insulated on the underside. In an apartment building, there is no shortage of these spaces. Spray foam insulation can provide an airtight space, effective R-Value insulation, and an efficient vapor barrier - all in one application.

Insulating During Retrofits

Insulating and air sealing is a productive retrofit during wall repairs and/or renovation activities. This is an ideal opportunity to address any corrosion in the walls; increase structural resilience; and otherwise make necessary repairs. The installation dramatically reduces energy costs.

Insulate the Interior Walls

When building repairs and/or refinishing include interior walls, properly insulating wall cavities is both opportune and profitable. And since apartment walls account for some 20% of total heat loss, the savings on seasonal energy costs are substantial. A proper air seal is also essential.

Insulating Accessible Attics

In low-rise MURBS, where attics are accessible, air sealing, insulation, and ventilation can make a big difference in overall energy efficiency. There are substantial savings on heating/cooling costs, improved seasonal comfort in the upper apartment suites, and better-controlled moisture levels.

Insulating with Roof Work

Here again, it's an ideal opportunity to insulate or re-insulate a roof, during a roof replacement or retrofit. Professionally managed, this is a project that must be comprehensive, with air sealing, insulation, and ventilation all contributing to maximum energy efficiency for the entire building.

Sealing Vertical "Chases"

Buildings usually suffer from cold air that enters the lower levels, and warm air that escapes from the higher levels. Professional insulation contractors effectively minimize this "stack effect". This dramatically reduces heating costs, reduction undesirable drafts, and prevents odor transfer. Properly insulating multi-unit residential buildings results in measurable cost savings for both residents and owners. With the right approach to sealing, insulation and ventilation, the energy efficiency of a building can be quantifiably improved - and that means dollar savings all around.

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

Southwestern Ontario

7035 Industrial Drive
Comber, Ontario
Canada N0P 1J0

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1027 Elwell Park Road
Gravenhurst, Ontario
Canada P1P 1R1

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29 Ferndale Industrial Drive
Barrie, Ontario
Canada L4N 9V5

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Port Perry, Ontario
Canada L9L 1B2

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GTA & South Central Ontario

450 Industrial Dr,
Toronto (Milton), Ontario
Canada L9T 5A6

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Eastern Ontario

1035 Moodie Dr #1,
Nepean, ON
K2R 1H4

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259 Campbell Street
Sarnia Ontario
Canada, N7T 2H3

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Niagara Region

6260 Don Murie St
Niagara Falls, ON
L2G 0B4

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From reputation to responsiveness, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thanks to everyone for the great ratings! 

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For the second year in a row, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thank you again to everyone!

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For the third year in a row, HomeStars ranked Great Northern Insulation at better than 95% for customer satisfaction.

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For four years now, HomeStars has ranked Great Northern Insulation at better than 95% for customer satisfaction.


GNI is the Authorized & Trusted Insulation and Air Sealing Installer for Lowe’s

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Energy saving and energy efficiency is easier than one might think. Great Northern Insulation helps to identify performance issues, while taking advantage of improvement opportunities.

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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.

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Do it right the first time
- with foam mastersTM

WALLTITE® ECO™ is a high-performance system, professionally installed by certified and approved specialists. Its C.C.M.C. approved (Canadian Construction Materials Centre) - with product quality guaranteed - and with installation by highly trained experts with the technical know-how to do the job right, the first time.


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GREENGUARD® Gold Certification ensures the strictest criteria for low-level chemical emissions. Certified products are safe for individuals with sensitivities (children/elderly) and safe for use in school environments and health-care facilities. The product certification is widely recognized by the LEED Rating System (Leadership in Energy/Environmental Design).

Insulthane Extreme

Insulthane® Extreme

For the ultimate in high performance spray foam insulation, Insulthane® Extreme is the professional choice for residential, commercial, and industrial application. With improved thermal performance over other products, Insulthane® Extreme has an exceptionally low Global Warming Potential (GWP). Considered environmentally friendly, this next generation spray foam insulation is non-ozone depleting, and exceeds specifications of other HFC product alternatives.


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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).


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Baeumler ApprovedTM gives you peace of mind when connecting with contractors, trades and home service providers. All Baeumler Approved members have demonstrated high quality work for customers and other trade professionals. Members must also have Workers Compensation, liability insurance of at least $1,000,000 and prove professional certification.

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 Energy Conservation Program provides incentives of up to $1,600 to customers who achieve energy efficiency and fuel savings – and Great Northern Insulation can pave the way.


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