Mike - as you might know, it'll be awhile and take some pressure, before we have locally grown hemp fiber as a binder for our lime plaster, or hemp hurds for slip chip, or hemp oil in the B-40 blend I buy up the road.
http://www.npr.org/templates/player/medi...&m=10395114Gotta start somewhere...
Tim - U is an inverse of R, a useful known when thinking of mass, heat sink and release.
http://en.wikipedia.org/wiki/R-value_(insulation)#U-value
