Our outdoor Sauna is the same as out FPF Sauna except that it comes with an unassembled cedar shingle roof package. You supply the waterproof pad and we provide the insulated modular room. The roof package includes wood plates, prefab rafters, nailers, facing, metal flashing, cedar shingles, ridge cap, and nails. You put it together. It includes an outdoor light switch. The Finlandia Outdoor Sauna is available is sizes ranging from 4'x4' to 8'x8'.
Outdoor sauna kits will not work in harsh climates. In such environments you should build a structure to hold a precut package to maximize R-value of walls. See picture below. You may also install a prefab unit inside a storage shed etc.