Energy Efficiency and Thermal Mass According to the LHC, a "...comprehensive review of the literature indicates that in most US climates there are proven benefits of thermal mass-using a wall's heat capacity to control and reduce annual heating and cooling energy demand... In practical terms, log homes may be expected to perform from 2.5% to over 15% more energy efficiently compared to an identical wood-frame home." Other industry experts echo the same findings while recommending to avoid log walls of less than 6-inch thickness in most climates, and 8 inches in colder climates, in order to provide for sufficient thermal protection. Thinner walls do not take advantage of the thermal mass of solid wood, which naturally moderates swings in temperature and humidity in the home's living space. To learn more, read the LHC's publication, The Energy Performance of Log Homes Sound Transmission and Log Walls Log structures also offer intrinsic benefits, such as the reduction of noise and/or noise pollution, which are not as easily achievable in a traditional wood-frame house. The density of a solid wood log wall significantly limits sound transmission, while the profile of the log actually deflects sound, providing for a more comfortable in-home environment. Learn more by reading the LHC Tech Note: Sound Transmission & Log Walls Fire Performance and Log Structures The LHC also confirmed the fire resistive nature of log walls through a series of exhaustive testing, satisfying the one-hour fire-resistant ratings, while providing even longer ratings with greater wall thickness. Log walls have a unique insulating response within the charred wood which produces a slow rate of flame spread along the wood surface. Unlike conventionally framed houses, log structures have no concealed cavities for fire to travel through, making them a "top choice for endurance and integrity in a fire," according to the LHC. To learn more go to the LHC publication: Preservation & Maintenance of Log Structures
