R-value

There is some debate in the radiant barrier business whether to use a perforated or a solid radiant barrier product in an attic application.
In an attic application, you should ALWAYS use a perforated product. Period.
Why? Solid products like bubble foil insulation are called “Vapor Barriers”.  A vapor barrier basically stops moisture from moving from point [...]

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Ed Fritz on November 24th, 2009

A common question is “What Is The R-Value of Radiant Barrier Foil?”
The answer: ZERO
Heat moves in 3 different methods:  1) Conductive 2) Radiant 3) Convective.  R-Value is a term used to measure how resistant a product is to CONDUCTIVE HEAT ONLY.  The best way to illustrate this is to picture an ice chest with a [...]

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