Do logs show wear and tear like conventional homes? What if the log home is built near an ocean, does the salt water and weather age the logs?
If properly stained, sealed and maintained logs will look and last for generations. The first enemy of logs is sunshine followed by water. In tough environments like the ocean extra steps should be taken to protect the logs. Like a conventional home more frequent maintenance (shorter time between caulking and re-staining) would be necessary.
