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Frequently Asked Questions

Your insulation questions answered!

Insulation FAQs

Do you have questions about insulation and/or insulation installation? We have compiled many of the frequently asked questions from our clients in British Columbia to serve as your guide.

Q: What's R-value?

It's a measurement of an insulation's ability to block the movement of heat. The higher the R-value, the more insulative the material. Higher number = better performance.  The R-Value that is required is different for different areas of your home and is also dependent on which zone you live in British Columbia. There are different requirements for the R-Values for your Attic, Cathedral Ceilings, Exterior Walls, Floors over Unheated Space, Foundation Walls, Heated Floors (Slabs), Unheated Floors (slabs) above the frost Line & Garage Doors (when heated).  Ask our Insulation Expert which R-Value is required in your zone.  


Q: What is the difference between R-Value & RSI?

Both are a measure of how well a material resists the passage of heat, R-Value is the imperial measurement and RSI is the metric equivalent. 

Spray foam, blown-in, and rigid-board type insulation are generally rated by their RSI Value per millimeter or R-Value per inch. Fiberglass and mineral-wool type insulation that is designed to fit into a framed cavity are generally rated by the size of the cavity that they are designed to fit into.

To convert an RSI Value to an R-Value, multiply the RSI Value by 5.678.

To convert an R-Value to an RSI Value, divide the R-Value by 5.678.



Q: Do I Have Signs of Insulation Problems?

Signs of insulation problems in the winter include:

Walls cold to touch

• Cold floors

• High heating costs

• Uneven heating levels within building

• Mold growing on walls

Signs of insulation problems in the in the summer include:

• Uncomfortably hot inside air

• High cooling costs

• Ineffectiveness of air conditioning system

• Mold growing in basement


Q: Is blown or rolled insulation better for your attic?

When it comes to insulation, there are a few different types to choose from including blown-in and rolled insulation. Blown-in insulation is made from materials such as fiberglass or other cellulose based materials that have been treated with chemicals that evaporate overtime. Blown-in insulation that features fiberglass don’t have any chemicals added and is non-toxi. Blown-in insulation is applied using a blowing machine that allows construction professionals to efficiently insulate every inch of your attic. Blown-in insulation has a high R-value and is a great method to efficiently insulate the attic area of your home.

Rolled insulation is what many of us picture when we think of insulation, it is primarily made from fiberglass but is also known to be made from plastic fibers, mineral wool, or natural fibers. It is presented as a big roll (hence its name) that can be cut to fit the area where it is being installed. The R-Value on rolled insulation can vary depending on your needs and budget – but remember, lower R-Value means less effective insulation.

Many people wonder which type is better for their Attic. Both of the aforementioned insulation types can be effective and offer benefits to your home and family, but, blown-in insulation is a more modern solution to a successful insulation installation. The attic is often a difficult space for rolled insulation due to the fact that they often feature small corners and odd nooks and crannies. Blown-in insulation is more effective in an attic space as it allows your construction professional to easily reach and treat those areas that may be more difficult when using rolled insulation. Blown-in insulation also takes less time to install than rolled insulation making it a more efficient way to experience the benefits of a successfully insulated attic.



Serving Central Vancouver Island, including Parksville, Qualicum Beach, Nanaimo & Port Alberni

For a free insulation installation estimate, connect with Absolute Insulation today.

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