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Yes - There is a Best Way to Insulate the Attic

March 22, 2016

Easy, fast, and affordable is not always the best approach. This is especially relevant with home insulation, and specifically true about attic insulation. And while the Internet is full of insulation pros and cons, there really is a best way to insulate the attic - Spray Polyurethane Foam. There is no shortage of discussion and debate about the various insulation products available today, and as always, every brand manufacturer has the best product available, and with the best outcomes. But in recent years, Spray Polyurethane Foam has emerged as the go-to product for professionals throughout the industry. The products are unique (and complex) and installation requires a high level of experience and expertise. But for a professional installer, nothing quite beats SPF - there are no other products on the market that can deliver comparable benefits with one application. And the one major benefit is sealing - nothing seals a space like the attic like the SPF product. Spray Polyurethane Foam seals a space completely, and creates a vapor barrier and air barrier at the same time. This serves to eliminate air movement and prevent moisture accumulation. And in the attic, both air and moisture will compromise insulation - something that just counters the whole purpose of insulating. With proper ventilation installed throughout the attic, SPF is the most effective insulation money can buy. But importantly, it requires a professional install. A Spray Polyurethane Foam installation is not for the DIY enthusiast. Even with a DIY kit and an in-store workshop, the products and application require the expertise of a trained installer. Good contractors always follow the manufacturer's specifications; observe the local bylaws; and above all, install to code. This is the only way to ensure optimal performance for the final installation. As well, inadequate DIY installations can set the stage for re-works and re-installs that are costly. For the average homeowner, SPF is a costly home improvement - more so than other insulation methods. And while its deemed as the best, it's still considered a premium product. Because of this, contractors are offering a more cost-effective approach that installs SPF along with another compatible insulation product. With this method, SPF is applied first in order to seal the space. Right after, loose fill insulation (many prefer cellulose) is installed to complete the project. In most of Canada, and in the northern parts of the USA, there are national standards for R-Value, particularly for newly built homes. Once again, whether its Spray Polyurethane Foam or a hybrid approach using a compatible product, there is nothing that comes close to the short term and long term product performance. Even with cost considerations, the yearly savings on heating and cooling will offset the original project investment. The cost benefit makes economic sense. The big question is whether there's a bad insulation product. The answer: probably not. But there is such a thing as the best product, and that's Spray Polyurethane Foam. There's also such a thing as a bad installation, and hence, the best approach with any product is the professional approach.

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Phone: 1-800-265-1914

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Niagara Falls, ON
L2G 0B4

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Best of 2017

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

HomeStars 2018

Best of 2018

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!

Homestars Best of 2019 Award

Best of 2019

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

Homestars Best of 2020 Award

Best of 2020

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

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

Enenrgy Savers

Energy Saving

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.

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

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.

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.


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).


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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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The GNI crew have been featured installing insulation on Love It or List It - have you seen our logo in an episode?

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