https://www.pergolakitsusa.com/12x18-arched-cedar-custom-hot-tub-enclosure-w-polycarb-sheeting/
12x18 Arched Cedar (custom) hot tub enclosure w polycarb sheeting - PergolaKitsUSA.com
The leader in ready-to-assemble pergola kits shipped direct to you. Cedar, redwood, and fiberglass pergola kits both free-standing and attached
hot tub enclosure
https://www.cedartubs.com/making-a-custom-hot-tub-enclosure-in-a-deck.html
Making a Custom Hot Tub Enclosure in a Deck
The easiest type of Hot Tub Enclosure to build is a square or rectangular wooden one.
hot tub enclosuremaking acustomdeck