Sauna Materials

Everything inside the sauna, and everything behind the wood. Cladding and bench boards, trim, vents and doors.

Most of what we ship is thermally modified, which means heat and steam and nothing else, no chemicals. A properly installed board will not shrink, warp, cup or rot in a hot wet room, and the color runs all the way through, so a cut end matches the face instead of flashing pale at every mitre.

The mistake we watch people make is ordering off the nominal width. A 1×4 STS4 board is milled 3.54 inches wide but covers 3.1 inches once the tongue seats. The 1×5 measures 4.72 and covers 4.3. Work your square footage off the coverage figure or you will finish a wall one row short, and that last row is never the one you want to be waiting on.

Behind the cladding goes the foil: 320 square feet a roll, reflecting up to 97 percent of radiant heat back into the room rather than into your framing. Tape the seams, overlapping the sheets rather than butting them, and plan two vents, a fixed grille in and an adjustable hatch out, which is what a heater warranty generally expects to see. Framing and mineral wool are yours to source locally.

Start with sauna wood for cladding and bench stock, then benches, doors and vents.

Call or text (844) 565-1113 with your wall dimensions and we will do the math with you.