A log home
constructed of 7″ solid wood walls might have an
indicated steady-state R-value of R-9. But in
most U.S. climates, especially those where log
homes are most popular, a stick framed
home would have to be insulated to about R-13
(or even R-15 in some areas) to perform as well
for heating and air-conditioning energy used on
an annual basis. this comparison assumes similar
attic insulation, window performance, foundation
design and the use of identically
efficient mechanical systems for heating and
cooling. in practical terms log homes may
be expected to perform from 2.5% to 15% more
energy efficient when compared to an identical
wood frame home, considering annual purchased
heating and cooling energy needs.
In real
terms, this means an owner of a log home might
expend $150 to $400 less per year on their
heating and cooling-related utility bills, while
maintaining equal or superior comfort under
real-world weather conditions. over the long
term, these savings add up – for example an
owner could have over $12,000 in today’s dollars
in the bank due to energy
efficiency.