Here at Rustic Lumber we carry multiple lumber options that can be used inside of saunas. Cedar is the most common product used as it is naturally rot resitant and adds the rich cedar smell. Aspen is also a great option for saunas as it's can be more cost efficient. If you don't prefer the smell of cedar, Aspen has almost virtually no smell to it. We can also source Clear Cedar as well if you prefer the look of having zero knots. Pricing: STK Cedar T&G 1x6: $1.80/Linear Foot Premium Aspen T&G 1x6: $1.38/Linear Foot Clear Cedar T&G 1x6: $7.20/Linear Foot For more information, give us a call! 801-882-2021 Wood, Lumber, Rustic, Home, Cabin, Siding, Home owner, Contractor, Barnwood, Barn, Accent wall. DIY, Woodworking, Garden, Garden Box, Shiplap, Wholesale