The professionals at Great Northern Insulation install spray foam in virtually any unenclosed cavity: walls and ceilings; attics and flat roofs; cathedral ceilings and floors; even garages. The professionals at Great Northern Insulation install spray foam in virtually any unenclosed cavity: walls and ceilings; attics and flat roofs; cathedral ceilings and floors; even garages.
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For most homeowners, attic insulation is a home improvement that is very often underestimated.
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GNI applied Owens Corning ProPink insulaton within the cavities of a studded wall has significant energy improvements over batt insulation.
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Today, thermal imaging has become an essential component of building diagnostics. Indeed, the extensive data that’s provided exceeds any other diagnostic approach.
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Fibreglass Batts are an extremely common form of insulation made from extremely fine fibres of glass woven together into thick pads.
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An air barrier helps to protect structural durability and boosts indoor comfort and air quality.
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Finding and sealing air leakage pathways early means time and money is saved during construction.
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Ensure Indoor Comfort At Your Cottage During Every Season With Cottage Insulation Upgrades
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Spray foam also creates a continuous air barrier that acts as the first line of defense against radon and other gases.
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For maximum energy efficiency, attics should be that is sealed, insulated, and ventilated – it will make for a “system” that provides both energy savings and home comfort
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All BASF wall systems are designed to maximize airtightness - they satisfy stringent building codes, and go well beyond the performance levels of conventional wall assemblies.
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Insulating the under-slab (in new construction or in renovation) effectively controls heat loss, and provides home comfort in winter and summer.
Learn MoreGNI took care of everything I needed to have a more comfortable, energy-efficient home
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Very professional and courteous. Greeted with a hand shake which is something that doesn’t happen all too often.
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Wow, just wow. First experience with Great Northern and I was and remain impressed with the experience
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GNI took care of arranging the energy audit beforehand so we could get a rebate on the work. The installers were quick, polite, and cleaned up after themselves!
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935 Keyes Drive
Woodstock, Ontario
Canada N4V 1C3
Phone: 1-800-265-1914
Fax: (519) 539-7946
TOLL FREE: 1-800-265-1914
1027 Elwell Park Road
Gravenhurst, Ontario
Canada P1P 1R1
TOLL FREE: 1-800-265-1914
29 Ferndale Industrial Drive
Barrie, Ontario
Canada L4N 9V5
TOLL FREE: 1-800-265-1914
2 Guided Court
Etobicoke, ON
M9V 4K6
TOLL FREE: 1-800-265-1914
103 North Port Road
Port Perry, Ontario
Canada L9L 1B2
TOLL FREE: 1-800-265-1914
450 Industrial Dr,
Toronto (Milton), Ontario
Canada L9T 5A6
TOLL FREE: 1-800-265-1914
1035 Moodie Dr #1,
Nepean, ON
K2R 1H4
TOLL FREE: 1-800-265-1914
25 Lincoln Ave
St. Catharines, ON
L2P 2C7
TOLL FREE: 1-800-265-1914
Great Northern Insulation - Better Business Bureau Profile.
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.
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
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
Great Northern Insulation is recognized as Canada's largest full-service insulation contractor. GNI is 100% Canadian owned, proudly serving Ontario customers since 1980.
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.
Huntsman HEATLOK® SOYA HFO™
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
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.
The GNI crew have been featured installing insulation on Love It or List It - have you seen our logo in an episode?
Climatizer
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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