A firm, stable, level foundation is critical. Our typical 6’x3’ tub weighs 4400 pounds when filled and a 7’x 4’ hot tub weighs over 8500 pounds.
- On Ground Installations: Design a base at 1 to 2 feet larger than the edge of the tub to prevent dirt splash and rot from soil acids. Either a level 4" thick reinforced concrete pad or 6” of compacted crushed gravel with a perimeter will support the hot tub. A recessed tub in a deck that has a ground contact foundation should follow these same parameters.
- On Deck or Roof Installations: The deck structure must be able to handle the weight of the filled tub with a safety margin. If the tub is recessed, plan for adequate access to the plumbing and the tub's exterior to service leaks and tighten bands.
Tub and surround specification diagrams
Download the 3-foot and 4-foot-high tub and surround diagrams, including plan, elevation and isometric views with dimension tables.