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This style is very popular with log home "kits". They do let you build quicker, but the logs don't typically last that long

This lets moisture get trapped between the logs (note the "well" channel in the middle) which can lead to rot. You'll be spending a lot of time, effort, and money on surface treatments with this style. The treatments themselves aren't that great for your health or the environment

The traditional method needs no treatments since the log dries completely after each storm