How long will my Log Cabin last?
All Structural timbers are treated with Resistol, a well-known product for this purpose. Below is a PDF giving further details.
The external tongue & groove or log is treated with an environmentally friendly treatment that will require further periodic treatments, as long as this is done every 2 -5 years, depending on siting and exposure to the elements your building will last a lifetime and more. This type of construction has been in the Scandinavian countries for centuries without any problems.
All of our UPVC doors and windows have a life expectancy of 25 years+
External timber doors and windows will require much more periodic treatment if they are to last.