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Found 33 results for the keyword(s) ‘R-Value’

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  RIGID BOARD: EXTRUDED POLYSTYRENE

  Example: Styrofoam products by Dow (by the way, Styrofoam is a Dow Chemical brand name and not a generic term for foam insulation). Colour: Blue (Dow) or Pink (Celfort) Thermal Resistance: RSI - .035/mm R - 5.0/in. Very high. Cost: high Capacity to dry out if wet: Won't get wet Fire Resistan...
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  LOOSE FILL BLOWN IN: CELLULOSE

  Common Name: Cellulose Fiber, ground up newspapers. Colour: Grey or white. Thermal Resistance: RSI - .025/mm R - 3.6/in. Good Cost: Lowest plus blower. (The only blowers that can be rented by homeowners) Capacity to dry out if wet: Fair to poor Fire Resistance: Good to Fair (Borax can leach ...
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  Why is Celotex insulation not seen much in Canada?

  Gordon from Montreal writes asking about the use of Celotex foam insulation (with aluminium foil cladding on both sides- 4 X 8 sheets). He writes: "For your information, the Celotex product is considered by many, to be a premium insulator for residential installations. Ironically it is made in C...
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  WILL REFLECTIVE FOILS HELP TO INSULATE MY WALLS?

  Yes but no. (I thought you'd like that one.) Aluminum reflectors will turn back RADIATION heat losses into the house, and in fact help to limit heat losses. However, they will only work if there is at least a half-inch air space in front of the reflective surface and the surface remains clean an...
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  WHAT ARE THE RECOMMENDED INSULATION LEVELS?

  Back in the early 1980's there existed some fairly simple tables to guide homeowners in determining the insulation levels that they might want to put into the various parts of their houses. We had tables for standard houses, for energy efficient houses, super insulated houses and even for trying ...
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  Is R-24 paint for real?

  A while back Glidden Paints had begun marketing Ceramic InsulCoat paint in Canada, claiming R-24 insulation values for a coat of paint. Does this new high tech paint really provide the equivalent of an R-24 insulation value to your Canadian home?No! In Canada, even the best reflective paint wil...
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  What does R-factor mean in thermal insulation?

  When scientists measure the movement of heat (thermal transfer) through a material, they calculate it in something called the U-factor, a measure of thermal conductivity. A small number indicates a material that conducts heat poorly and a high one indicates a material that conducts heat well....
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  Conversion Table : Metric / Imperial

  Here is a useful conversion chart for insulation, ventilation and general measurements.
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  R value and Temperature conversion charts

  This chart will give you quick conversions between imperial and metric for both R-values and temperature.
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  WINDOWS

  No matter how you cut it -- a good window is still a lousy wall. Glass has almost no thermal resistance (RSI - 0.16; R - 0.88), and a single-pane window in Canada not only makes a lousy wall in winter, but it makes a lousy window too -- you can't see through the thick layer of ice! But a ho...