Recently I posted a picture of the sauna fire burning hot and mentioned Sam McGee. For those who don’t know, Sam McGee was the sad character from Tennessee who could not take the cold of the Yukon in the poem by Robert Service: The Cremation of Sam McGee. His last wish was to be cremated, a task his friend dutifully tried to complete. The ending had the narrator peeking into the make-do crematorium in the boiler of the derelict ship stuck in the ice on Lake Lebarge and finding his late friend as warm as could be and calling out to shut the door.
Whenever it is extremely cold out, as it has been recently, I think of this poem and the warming power of a hot fire. I love it when the mercury dips below zero. There is something invigorating about having your snot freeze when you breath hard or having sweat icicles dangling off of your brow. I love cross-country skiing in the dark, in the cold, when two hats and two pairs of gloves are needed. One false move and the night might end like “To Build a Fire” by Jack London, another favorite read from Middle school—when I would dream about all of the great explorers who ventured into the frozen lands.
walking through the snow towards a hot sauna fire
I remember my senior year of high school when Cayuga Lake last froze over. That was a cold year. We did a lot of cross-country ski races that year. With our skimpy race suits and tiny boots we had no protection other than the fire in our hearts to keep us from freezing to death. During the Canadian Ski Marathon that year it was minus 40 at the 8 a.m. start. Celsius and Fahrenheit. If you blinked too long your eyes would literally freeze shut. Old lady volunteers would slap our cheeks at checkpoints to make sure we didn’t have frostbite (and we still wore our skimpy suits.) By the end of that year my parents had moved to the heart of the lower Adirondacks. Our house, in the Black River valley, was often the coldest spot in the lower 48. It was minus 25°F for days on end. Thunder would boom from the river each night as the ice expanded. The ice was several feet thick; I have no idea how the fish survived. I loved to be out in that: skating, skiing, or snowshoeing. It was the cold of a Jack London Story. Your spit would literally freeze in mid air and hit the ground with a crackle.
I had a hot sauna to crawl into after our ski races during that cold winter in high school but not in the years after. When I moved back to the area after college, I went back to that sauna at Podunk weekly until I could build my own and have kept up the ritual ever since. On these freezing nights it is never too cold for a sauna; in fact I relish those times when you can experience the 200° (or more) difference as you go from the hot room to the night air. Your feet freeze to the ground and your hair forms punky icicles.
There’s no need to wait until you are cremated to be truly warm; Poor Sam McGee, if only he had a sauna!
It’s been a busy year at Rob Licht Custom Saunas and as the holidays approach it is a good time to look back everything that’s been accomplished, the hurdles we’ve gotten over, and to be thankful for the blessings we’ve received.
We started the year in the midst of the pandemic which made for some challenges but mostly the pandemic has meant a huge uptick in the sauna business as we all became more centered on home life and more reluctant to go out into public for things like gyms and saunas. Besides the several projects I have completed locally and around central New York I have fielded calls and emails from folks desperate to have their own saunas from as far away as Europe and Australia. I never set out to become a sauna expert, but here I am, 25 years into making them, and people are seeking out my knowledge from all over. In the process I feel like I have made many new friends. The global sauna community is alive and well. At the same time, due to the pandemic, I have mostly refrained from seeing all but my closest friends and family. It’s a strange new world but I am thankful to be connecting to so many people, if only on Zoom.
For my new friends I have designed and consulted on saunas from Maine to California— that has kept me busy when I was not getting my hands dirty. But whenever I can, I am working with my hands, either in my 3000 square foot shop, which I am ever grateful for, or I am on jobsites. It used to be that builders would simply stop in the winter and spend the dark months sitting around the woodstove reading back issues of Fine Homebuilding, but now we all seem to be out there in any weather. My cut off is 10° F; any colder and I want to be by a fire, in the sauna, preferably. Good gear helps; I’m especially grateful for my boot warmer and insulated pants.
Mobile Saunas showcased in the shop. Lansing, NY
Nothing I do is cookie cutter—I would die of boredom is life was too easy— thus the custom in my business moniker. This year I seemed to run the gamut of sauna permutations: First, a garage retrofit to a Yoga and sauna retreat, then a quiet walkout basement electric affair, then a classic one room wood burning sauna on a idyllic creek, then a more urban collaboration in Syracuse, followed by a tiny personal electric sauna in a bathroom, a rustic elegant wood burning retreat in the trees, and a distance job downstate. Currently I’m finishing up an electric sauna in a historic boathouse on Cayuga lake. I’m hoping to take it for a test drive, with a jump in the frigid water, by Christmas.
Garage Retrofit for Hot Yoga and SaunaClassic Creekside Sauna set 50 ft from swimming hole. Idyllic.Walkout Basement Electric Sauna BlissBackyard Sauna Design, Urban Collaboration in Syracuse, NYRustic elegant wood burning saunaCozy interior of a backyard sauna
In between all of these I have sold a few of my Lämpimämpi sauna stoves and many sauna plans. DIY interests, especially in the mobile saunas which are really big now. I get a kick out seeing my designs being brought to life by many different hands. It is also fun to see all of the other builders following in my steps. The more builders, the better. There is plenty of work to go around and I encourage anyone who wants to take the work seriously to pursue it with a passion. I did offer a sauna building class this year but had to cancel; Covid has thrown a wrench into a lot of plans. But stay tuned: perhaps 2022 will be the year.
Covid also threw into a wrench into the supply chain. We’ve all heard the phrase “supply chain disruption” by now. I bid jobs in the beginning of the year only see to prices on materials I quoted go up by 250%. Some materials simply vanished from the shelves. But now things have settled down and I also started ordering and stock piling materials well in advance. I can keep several saunas worth lumber and supplies in my big shop and insulate myself from some of the inflation—another reason to be grateful for the big work space.
Rob at the shop!
I’ve been working alone for most of the year, which actually suits me fine, especially with Covid lurking. Workers are hard to come by: not only are the skilled trades losing new blood, but, I think, the pandemic relief made a lot people lazy and unwilling to get off the couch. Scarlet, now my partner in everything, has been my greatest blessing. When she can escape childcare duties she has proven to be the hardest worker I could wish for. I could use a few more workers like her: eager to learn, unafraid of dust and dirt and willing to sweat. She also manages all of the marketing, so give her the kudos for the web media you see. The business feels like it wants to grow so if anyone is seriously interested in building saunas and wants to relocate to Ithaca, drop me a line.
For those of you lucky enough to have a sauna, I hope you get to celebrate the New Year in it for there is no better way to bring in the new and shake out the old. It’s been my tradition for four decades now and I hope to continue for four more.
Taking Sauna with Scarlet by the Lake, December 2021.
Lately I have been thinking about the application of the foil I use in my saunas as a radiant vapor barrier. Perhaps this is because it almost Christmas and I was thinking of how we decorated the tree each year. The final touch would be to drape foil tinsel over everything; our mother would have to constantly damp down our enthusiasm by reminding us to place it carefully on each branch, not to throw it.
This suspicious “sauna” foil is Aluminum-coated Plastic—upper working temperature of only 55-120° C.
There are tricks to using the foil but the first and most important step is to buy the right stuff. Like the tinsel we put on the tree, the foil may actually be aluminum-coated plastic— which you don’t want to use. That plastic is likely polyethylene which, if you look it up on the material specification sheet that every product has, it has an upper working temperature of 55-120° C, meaning it will likely melt at typical sauna temps. Sauna Foil, available from any of the familiar sauna suppliers, is aluminum foil on a kraft paper backing. I used to find it with fiberglass reinforcing thread, which is helpful because the stuff tears easily. Also helpful is 4 ft. rolls, rather than 3 ft so you can do a wall in 2 passes, but I have trouble finding this too. I recently tried a new supplier selling 4 ft rolls of “sauna” foil, but upon opening it had a suspicious plastic look to it. That night I put it in the sauna and within seconds it began to distort and curl up like the polyethylene I suspected it was made of. (See illustration above)
The second thing is to design the wall correctly. I read and see a lot of misinformation that touts using no air gap with foil. The air gap is essential. The foil works by reflecting radiant heat. All “black bodies” give off and absorb radiant heat that travels in a straight line from one hotter object to another cooler one, the hotter the body, the more heat it emits. The sauna rocks radiate a “soft” heat to you, the walls, and the benches, and that is why you want the sauna to be laid out so that everyone has a view of the rocks. The fire, if seen through a clear glass door, also radiates heat— but at a higher intensity. Too high for a comfortable sauna (but great for ambiance.) When that heat hits foil, it is reflected back into the room or the backside of the cedar—if there is an air gap of at least 1/2″. If it touches the backside of the cedar the foil— also a perfect conductor—pulls the heat away from the cedar and transfers to the wall space behind.
Air Gap. A Sauna Building Best Practice.
I’ve understood this for along time. The first semester of college I took a class: Solar Design and the Energy Efficient Home. We learned all about insulation, heat transfer and basic building skills. The first day of lab, where we were building a timber frame house, I was handed a Makita 12″ circular saw. My building career started right then and there.
With the web of misinformation out there I had to think of a way to illustrate this basic principle of thermodynamics that I learned my freshman year. So, one slow day in the shop I rigged up an experiment and photographed it. (see illustration below) I set up a section of cedar wall about 18″ from my infrared shop heater and fastened 2 pieces of foil to the back, one with a 3/4″ air gap, and one with no gap. After an hour the cedar was 250°F on the front—like it is often is in my sauna. The back of the cedar was 121° F, which is impressive by itself. The back of the foil with no gap was 115°F, meaning it was acting as a perfect conductor, and the back of the foil with an air gap was 71°F: room temp. The air gap was clearly making a difference, 45° in this case.
The thermodynamic experiment begins.
After an hour on cedar
back of cedar
back of foil, no gap
air gap makes big difference!
The foil is a perfect vapor barrier rated at zero perms— meaning no vapor moves through it. But unless you layer it properly, with insulation behind it, the moisture will condense on it, or the first cold surface it hits. Even in a perfect build, there might be cold spots in the insulation (typically about the size of a mouse hole), so there likely be some condensation, but not a problem if there is air movement. The air gap behind the cedar allows air to circulate around the cedar, removing any moisture and ensuring that the wood heats and dries evenly and remains stable. Heating one side of a board and wetting or cooling the other is how you make curved boat staves.
There are other tricks to using the foil- like unrolling it and re-rolling it foil-in, or using temporary magnets when working a commercial job with metal studs, but the key is to use care. Use plenty of hi-temp foil tape and patch tears as you go and work with a partner if possible.
I suppose you could build a sauna by putting a heater in a refrigerator box- but that would last about a day and be incredibly wasteful. Cedar touching foil won’t ruin your sauna and neither will plastic melting in the walls where you don’t see it. But if you are going to take the time and bear the expense of building a sauna, you might as well do it right and so it will last generations. I guess my mother was right: applying foil carefully and not just throwing it up is the way to work.
Building a sauna requires many skills. Basically it is a small house; there are windows and doors, a roof and a foundation; framing, sheathing, subfloor, and the like. It also requires a design, and many cases, a permit, which will include drawings such as a site plan, showing required set backs and orientation. All of this I can do— from plans and permit applications to foundation to chimney. I pride my self on being able to do it all and to being as comfortable holding a drafting pencil ( yes, I do drawings old-school) as I am a pick-axe or nail-gun. But the truth is, sometimes it is best to let others do the work they do best so I can focus on what I do best, which is the sauna.
Recently I had a job where distance made it much more efficient for the owners to use a local contractor to build the shell while I did only the sauna interior and the overall design. It turned out that Tim and his crew were much more adept than me at not only building the shell but carefully replicating the trim details of the 150 year-old adjacent main house. By the time I got to the job site the interior was ready for my sauna work.
Just like everyone else during the pandemic, planning sessions happened on the web or via text; we only actually all met once. Despite that, or maybe because we weren’t in each other’s hair (a sauna is, after all, a very small space), things flowed very smoothly once we got over the scheduling speed bump caused by the pandemic-induced supply chain upheaval. The sauna sits perfectly between the historical architecture of the house and the modern look of a contemporary sauna. It was a team effort that paid off.
When building a sauna the first and possibly most important consideration is the location. With a wood-burning sauna, which is free from the tether of an electrical connection, it can be away from the house—not just for safety but also to create a separation from the electrical buzz of modern life. Simple and inexpensive solar options make it easy to provide needed lighting. It should have some of the comfort of home but be integrated into nature; near a body of water is always a good choice.
My latest sauna does all of that and more. The site is fairly close to the house but lies outside the garden gates. It all but hangs on the edge of a small gorge that contains a lively creek in its serpentine confines. Like the basswood and cherry trees that cling to the sides of the gorge, firmly rooted in the ground, the sauna is anchored to the 300 million year old shale bedrock with concrete and steel. The owners built a steep stair down to where small waterfall flows into a perfect bathtub sized hole. Descending it may be slightly perilous but that only adds to the adrenaline to rushing from the steaming of the sauna and plunging in the ever-cold water.
As I build I tweak my design to allow nature into the sauna. Framed and without sheathing I could see the perfect view up the ravine from the upper bench, suggesting the optimum location for a small candle window. The large window allows a view of the wooded hill and brings in ample afternoon light and the view down into the creek through the framing allowed me to imagine the possibility of a small square creek view porthole below knee level that would let in the ambient sound of the rushing creek. Exiting the sauna one faces the woods, not the house; a crude stair-path leads the eye up into the forest while the other leads to the creek.
The sauna is visible from the road and the house, but neither is evident from the sanctuary within. All you hear is the babble of the creek and all you feel is the relaxing heat of the sauna. Finishing a few rounds in the sauna with a dunk in the massaging water is pure bliss.
The site not only perfect for the sauna but it was a joy to work there, listening to and watching the water flow. Daily I took dips in the creek to beat the steamy summer heat. Having a site that allows me to enjoy the process of building lends means I can build a better sauna—one that is infused with the spirit of the place and connected to nature.
Increasingly I hear from clients who want their sauna as a way to enhance their hot yoga (Bikram) practice. It’s a perfect pairing: what better way to follow up (or warm up for) a yoga session than with an even hotter sauna!
Recently a couple asked me to convert an old dingy freestanding cinder block garage into a sauna/ hot yoga studio. First I made sure the cinderblock wall was stable and did some minimal repairs. Then I isolated the block wall from the warm, humid space by adhering expanded polystyrene (XPS) foam board to the walls. This is critical as it prevents moist air from hitting the cold cinder blocks and condensing. Then I framed in the space, insulated the walls with mineral wool batts and finished the yoga space with drywall and the sauna with cedar (with the requisite radiant sauna foil layer and air gap). New windows replaced the old; the dramatic deep window recesses a result of the thick walls. Bamboo flooring over floating sleepers over foam board created just the right bounce for the yoga space, while the sauna has traditional duck boards. LED lighting added just the right ambiance. The heart of the sauna is the Harvia Cilindro heater with it’s 200 pound rock capacity. Amazingly, the old building was plumb and square— the original masons did a good job. Fighting an out-of-square space is the bane of all renovators.
This project was a complete transformation for this building (see below), turning it from a creaky old, under-utilized garage into a revitalized space for self-transformation. Make an inventory of the neglected spaces on your property awaiting transformation and give me a call!
