Foundation: Ritual 8-Person

Section 4.5Site preparation

Foundation: Ritual 8-Person

Footprint, foundation rating, and acceptable surfaces for the 8-Person flagship — most residential decks are not rated for this load.

The 8-Person sauna requires a foundation that supports a loaded weight of 3,300 lbs / 1,500 kg.

Footprint
82.7 inches × 94.5 inches (210 cm × 240 cm).
Foundation rating
Minimum 3,300 lbs / 1,500 kg distributed across the footprint.
Recommended foundation thickness for poured concrete
4 to 6 inches / 10 to 15 cm.

Acceptable surfaces

See Section 4.1 for general principles.

  • 4 to 6 inch poured concrete slab (the higher end recommended for this model)
  • Existing concrete patio rated for the load
  • Wood platform engineered for 3,300 lbs of distributed weight
  • Decks: most residential decks are not rated for this load. We recommend concrete or an engineered platform for the 8-Person rather than an existing deck. Consult a structural engineer if you intend to install on a deck.

For clearance around the unit, see Section 4.11.

Last updated May 3, 2026