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Viable Options to Ensure Proper Attic Insulation

December 19, 2014

For proper attic insulation, one thing that contractors agree on completely is using the right product (or combination of products) for the job.Even before choosing the product, there are some important considerations, and a good contractor will work with the customer to best assess the project needs.To begin with, a thorough attic inspection would be in order - then an assessment of the existing conditions - then some debate about product options - and finally, a discussion about costs.

One of the most affordable options, especially when there are budget limitations, is "blown" insulation.This is a product that's composed of fiberglass or cellulose, both of which are "fluffy" in nature.The whole idea behind "blown" insulation is to restrict air movement, which is what contributes to effective insulation, especially in those large attic spaces.Both the fiberglass and the cellulose versions are fabricated to be fire-resistant, mold resistant, and rodent resistant.

"Blown" insulation is blown throughout the attic space using special equipment that disperses the material with uniform density.This type of insulation can be applied right on top of any existing insulation, and will increase the R-value accordingly. Both fiberglass and cellulose can effectively cover the attic space, including all HVAC ductwork; wooden support beams; plumbing pipes; and electrical wires.Properly installed, "blown" insulation delivers excellent dollar value per inch.

The very best insulation product in the industry is spray foam insulation.Contractors acknowledge spray foam as the best insulator for the attic, delivering the most features and benefits of any other product on the market.This product is sprayed out in thick liquid form, and expands into its place almost immediately.It hardens into a thick, dense blanket of insulation, covering every hole, crack and crevice completely.Even the hard-to-reach spaces are filled and sealed.

The beauty of spray foam insulation is its ability to provide total coverage. Everything is enveloped - the wood support beams - all of the plumbing and wiring - and all of the HVAC ductwork.When professionally installed, the attic space is 100% sealed and insulated.The finished job constitutes a complete "system", and actually provides a combination air barrier and moisture barrier in one. No other product on the market can provide a comparable R-Value.

For the professional contractor, the very best approach to attic insulation is the "hybrid" approach.It's a combination approach that makes use of BOTH "blown" insulation AND spray foam, and it could be a combination of spray foam + cellulose OR spray foam + fiberglass.The spray foam application provides the very best air and moisture barrier, while the "blown" insulation provides the dollar value that keeps the project on budget.

While it's true that the products and techniques described above might be viable as DIY projects, it's also true that a professional will deliver the best job.The experts know how to create a system - a well-balanced environment where everything is well sealed, well ventilated, and well insulated.Its what professional installers refer to as a "true insulated building envelope".

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Phone: 1-800-265-1914

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L2P 2C7

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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 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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