Is the calculated R-value based on the ASHRAE Fundamentals Handbook?

Yes. The ASHRAE Handbook values are a subset of data from the National Bureau of Standards (NBS).

Product Reference: 

Silver Shield
FSK Shield
Radiant Shield
AA2 Vapor Shield
RBI Shield
VR Plus Shield
M-Shield®
GFP Insulation
HY-Fi
RetroShield® System
Garage Door Insulation Kit

Professionals Reference: 

Builder
Insulation Contractor
Rater

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