Another problem with conventional, fiberglass-insulated construction is that after a certain amount in insulation is applied, an optimum is reached after which additional insulation will provide little or no gain in efficiency. Further, a test of R-13 rated fiber glass containing one and a half percent moisture content indicates that it is only an R-8.3 in its actual performance; a loss of approximately 40 percent. Other data shows further losses due to compaction, settling, dust retention, and additional moisture.

It doesn't take long to see why log is a superior building material with its already respectable R-rating, plus the added effects of its high thermal mass. A properly constructed log building is also a more tightly sealed structure, further aiding the insulating process through reduced air infiltration. Recent field tests of similar buildings constructed of various types of building materials, including log, showed that the log home in the three week heating period, used 46 percent less heating energy than the insulated wood frame test home and used 24 percent less cooling energy in the one week summer cooling period. Testimonials from satisfied customers also bear further witness to the energy savings that can be obtained by living in a log home.