[Bldg-sim] U-Factor/R-Value Formula

[Matthew Higgins]

Does anyone have a formula to calculate either U-Factor or R-Value using 
the eQuest material properties of the following?

Conductivity = (Btu/h-ft-°F)

Density =  (lb/ft^3 )

Specific Heat = (Btu/lb-°F)

And thickness.

-- 
Matthew Higgins, LEED AP
Technical Specialist
Environmental Dynamics, Inc.
Architecture and Sustainability Consulting Services
505.242.2851