Foundation: Ritual 4-Person

Footprint, foundation rating, and acceptable surfaces for the 4-Person model — note the deck-rating callout.

The 4-Person sauna requires a foundation that supports a loaded weight of 1,985 lbs / 900 kg.

Footprint: 82.7 inches × 63 inches (210 cm × 160 cm).
Foundation rating: Minimum 1,985 lbs / 900 kg distributed across the footprint.
Recommended foundation thickness for poured concrete: 4 inches / 10 cm minimum.

Acceptable surfaces

See Section 4.1 for general principles.

4 inch poured concrete slab
Existing concrete patio rated for similar load
Wood platform built to support 1,985 lbs distributed
Deck rated for 1,985 lbs of additional load (a standard residential deck is often rated for 40 to 50 lbs per square foot, which means a deck must explicitly support this load on the footprint area; check with the deck builder or a structural engineer if you're unsure)

For clearance around the unit, see Section 4.11.

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