Wooden saunas and hot tubs like that are awesome sauce, my friend! I had a good bit of experience here in Hawai'i after I first arrived with a wooden, wood-fired hot tub. I even saved it after the fellow who cleaned it forgot to refill it immediately, so the wood dried, and the tub could no longer hold water! I saved it by retightening the metal rings! 😁🙏💚✨🤙