Thermal insulation in your log cabin could reach the end of its lifespan or usefulness. That is not a problem since you only need to replace or upgrade the material. Thermal insulation for log homes is therefore hassle-free.
Insulated log homes. For better enrgy efficiency a log home can be additionally insulated. The thermal conductivity of timber is ca 12 times lower than of concrete.
Best Insulation Methods for Log Cabins. Not all insulation methods work well with logs. The key is not to ruin the natural breathability of wood while improving the thermal performance.

Is insulation needed for log cabins? The natural thermal insulation of a log cabin ensures that it does not need much, if any, insulation from the outside. However, if you spend time inside the insulated log cabin year-round or your log cabin is quite large, consider insulating it.
I would also try to nudge log cabin insulation for the roof as well. You may also be interested in this post on double glazing, R and U values and Log cabin thermal properties: Double Glazing in Log Cabins.

Enhance the insulation of your log cabin roof with our high-quality polyisocyanurate sheets. Easy to fit and effective in reducing heat loss.Ranging from outdoor toilets, home bars and other additional extras for your garden building or play accessories for your climbing frame.
Log homes offer natural insulation thanks to the thickness of the logs used in construction. This natural insulation not only keeps the indoor temperature stable but also reduces the need for additional insulation materials such as fiberglass or foam. The thermal performance of...
Design principles for log buildings. Keywords: logs, log buildings, log construction.Provisions for thermal insulation As a new regulation for the log walls at least 180 mm thick, is the specific reference value of the overall heat transfer coefficient.