Read the Frequently Asked Questions of Our Clients

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Frequently Asked Questions

Absolute Insulation Inc. in Langley compiled all the frequently asked questions of our clients in British Columbia to serve as your guide. Please read through them before deciding to work with us.



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.

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