The treating of the timber or log of your log cabins and timber buildings once they have been erected is the best way to preserve the wood. By using a top quality wood preservative to treat the logs or timber it will not only protect the wood but will help against any mildew and rot. The best preservative for your log cabins is a natural oil based wood preservative that is available for interior and exterior wood, the natural oils in this preservative will help against any insects as well as being environmentally friendly. If your use a water or spirit based wood preservative to treat your log cabin or garden buildings you will have to re-treat the logs or timber every 2 years to keep your log cabin in good condition, with an oil based preservative it will only need to be treated every 4 or 5 years. With a wide selection of colors available to make your cabin blend in to its surroundings or be bright an bold but just make sure when you are choosing a colored wood preservative that it will not only color your log or timber but also protect you wood.