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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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Toronto (Milton), Ontario
Canada L9T 5A6

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Nepean, ON
K2R 1H4

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Sarnia Ontario
Canada, N7T 2H3

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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.

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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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- 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.


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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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