DIY sauna construction details
Well, this is an illustrated story "How to build your own sauna". My house is made of aerated autoclaved concrete blocks. The outer wall got 10 cm mineral wool insulation. Inside the sauna walls were carefully plastered with water resistant cement plaster (cement + sand + water + silicates). It is better to use modern organic water resistant chemicals (like Krystol), but plastered walls in my sauna will not be in direct contact with water or mechanical damaging agents to remove the waterproofing Calcium Silicate Hydrates from the Sauna walls.
I am going to place a Russian made metal wood burning Vulkan sauna stove ($300.00) in the sauna. Wood burning stove has more heat output comparing to electric stoves. Also it is a "green stove" without any electromagnetic fields, generated by electric sauna stoves. That sauna heater is equipped with the water boiling system. Furthermore in XXI century Russia the house electricity supply can be turned off at any time - due to any accident or by the will of drunk electric supply company personnel. So it is better to be "fuel independent", especially if you are relaxing in your sauna.
The most popular sauna sizes are 150 x 210 cm and 180 x 210 cm. This size allows one sauna user to lay flat on a bench or four adults to sit in reasonable comfort. The ceiling height for a sauna can be from 200 cm to a maximum 210 cm high. A sauna height of 210 cm for the ceiling will permit the best heat level in the entire sauna. Because heat rises sauna ceiling height of 220 cm and more will defeat the temperature comfort inside. And don't forget to check the minimum sauna height in the sauna heater manual. See sauna benches dimensions chart for more details.
It took 6 weekends for me to build the sauna within the ACC block walls.
Do-it-yourself sauna step-by-step construction details: