Treated logs are actually a good choice of building material for pest resistance, as the log provides both interior and exterior walls, both resistant to pests. There are no wall voids to encourage accumulation of other pests. Since the logs are treated with borates, they are resistant to termites, fungi, wood-boring beetles and even fire. A steep roof with two-foot overhangs provides good drainage and protects dormers and gables. Diatomaceous earth and borates have both been used.
Borates are cheaper and more effective.
William Quarles, Ph.D., works for BIRC, PO Box 7414, Berkeley, CA 94707 and is Managing Editor of the IPM Practitioner, a monthly newsletter profiling the methods of integrated pest management.