krw wrote:

If you read back, I said that foild will help by REFLECTING radiated
heat. It doesn't do squat for the 'R' value, however, because that
is a measure of CONDUCTED heat.

No. R-values are measured, and they include all forms of heatflow.

Your definition of "R-value" is meaningless. The 'R' varies by
application, which makes it a meaningless number.

You've made a mistake, Keith. I suggest you admit it and move on.

Nick