Start with a level, stable base. Concrete pavers, packed gravel, or a poured slab all work well. The foundation must be perfectly level — this is the most critical step for a leak-free tub. Allow adequate space around the perimeter for the heating system skid pad and any optional enclosures.

Lower the cedar floor panel into place on the prepared foundation. The floor should sit flat and centered. Check for level in all directions before proceeding — small adjustments here prevent problems at every stage that follows.

Stand the cedar stave panels upright around the floor, working your way around the circumference. The tongue-and-groove joints should fit snugly together. Steel tension bands are placed around the exterior to hold the walls firmly in position as you work.

Fit the interior bench seats into position, securing them to the wall staves. Cedar seats are designed to interlock with the wall assembly for a solid, comfortable fit. Confirm all hardware is tightened evenly before moving to the plumbing stage.

Connect the jet inlets, suction fittings, and drain lines through the pre-drilled wall openings. Run plumbing lines to the skid pad (spa pack) where your heater and pump will be located. All fittings should be hand-tightened then secured with the supplied hardware — do not overtighten.

If your tub includes an spa pack or gas heater system, have a licensed professional connect it to the appropriate power or gas supply before first use.

With plumbing connected and bands tensioned, your cedar tub assembly is complete. Fill with water to begin the initial swell cycle — this allows the cedar staves to expand and seal naturally. Check all fittings during the first fill and make any minor adjustments as needed.

📖 Related Reading: Before you begin assembly, make sure your site is ready — check out our Tub Site Preparation Guide for foundation, electrical, and staining tips.