moisture is indeed bad. but moisture and time are the real killers. you kind of need both. "sealing" the logs will only trap the moisture behind the seal. if building a "traditional" log home, the settling will crack the fiberglass, and a BnP will lift away from the glass. I would do several things: try to keep the shower away from logs, physically if possible and use a shower curtain in the (clawfoot) tub if you have to. Put in a big exhaust fan. if you are doing forced air, put the register right below the wall.
alternatively, you could remove the wall near the shower entirely and go with privacy block. It is kind of expensive and not that insulative, but for a small door-sized opening in a bathroom, it might be OK.
the key is to be smarter than the objects you are working with. if you know that something is bad, then find a way around it.
-Peter



Does anyone have a suggestion for what to do with a shower that is installed next to a log wall with window?
I like the look of the log wall but I know moisture will be the ruin of it. Fiberglass the logs?
Thanks,
Dave