Unlike most saunas, which have low ceilings, this large space allows a third bench for those who like it really hot. A simple hand pump can conveniently provide enough water for washing and "löyly," the steam blast created by dousing the hot sauna rocks.
Salmela's extensive use of brick is unusual. Instead of throwing water on rocks, the Emersons douse the hot walls. Bathers enjoy nature through carefully sited windows or flames in the glass-fronted firebox.
Famed Finnish architect Alvar Aalto's 1954 savusauna is traditional in form, with subtle modernist touches: the logs are tapered to create the gently pitched roof, and the footprint isn't square, but trapezoidal.
Aalto used wood for his sauna door handles; metal or glass hardware gets too hot to touch. Try making a one-of-a kind pull from driftwood. On benches or walls, avoid exposed nail heads to prevent burns.