BCO refused roof - U value too low.
What about conductivities in series ?
I guess these operate in the reciprocal sense to the reciprocal rule,
if that makes sense.
Actually, that's what I accidentally described, due to a brain fart. To
calculate the overall uValue, just multiply the %age of the material by the
uValue of that part and sum them all together. Only take reciprocals for the
series calculation.
Christian.
|