8'x12' sauna blueprints

Here is a sketch of my ideal sauna, drawn in ideal conditions

on scratch paper in a dimly lit changing room, with a couple beers, taking a sauna with an architect and contractor friend, while at my island lake cabin:

8'x12'sauna blueprints

  1. Compact: 8′x12′ overall dimensions.  Most building codes don’t require a building permit for structures less than 100 sq. ft.
  2. Efficient: a 6′x8′ hot room is a nice size.  Big enough to accommodate as a one person sauna to a six person sauna, yet small enough to heat quickly and efficiently.
  3. Divine proportion: the golden ratio of architecture, harmony within nature, plus all your building materials come in dimensions that offer minimal cutting and waste (to burn in your sauna stove).
  4. Two rooms: Critical in cold climates.  Just as grocery stores have double doors as an energy saver, your sauna should have a changing room.  It’s impossible to have an efficient sauna if the door from the hot room opens to the outside.  Close the door!
  5. Dual benches: Consider pushing your internal wall a few inches, 6’4″ bench length is a magic dimension.  One person can stretch out, laying on the sauna bench or three people can sit comfortably.  Duel benches allow for good flow.  One can alter the two bench plan, and there is a good argument that having an “L” bench instead, modesty, privacy wise.
  6. Versatile: A great sauna party by night can also be a nice home office escape or kids play area by day.  Storage above your hot room, and allow yourself to make a cabin style patio, that flows out from your changing room.  Turn your 8×12 sauna into a backyard escape.
  7. Odds & Ends: A few tips to consider:
  • Put a dimmer light in your hot room.
  • 7′ internal ceiling in hot room, never higher.  Less unneeded cube mass to heat.
  • Before cedar paneling your sauna/changing room, wire for sound and Ovi/Nokia mobile device technology.  Plus, I’m a fan of music in the sauna.

Build your own sauna: prep the area

To get your sauna area ready, in your backyard:

  1. Stake off the area. Mark off your 8′x12′ rectangle area with carpenter string.
  2. Prep the area. Pull off the sod and try to level off the area as best as possible.  If your sauna is going to go on uneven ground, don’t worry about it, you can level the area with block.
  3. Prep the perimeter. Dig around the perimeter, extended out a few inches from your perimeter.  Back fill the area with some gravel to assist drainage and to give your frame a nice resting area.
  4. Use a level. With a long board, check your bedding to get it as level as possible.  Here is where you can use block to level out the ground where you’ll be building your sauna.

I suggest building your backyard Finnish sauna right on this grade.  If you move or want to drag your sauna to a sauna party, who knows, you may just want to back up a trailer and take it with you.  Chances are, you’ll fall in love with your own authentic Finnish sauna.

Build your own sauna: materials list

By popular demand, here is a complete list of what you’ll need to build your own sauna.   Life is short: you deserve your own authentic Finnish sauna!!

Step one: Go out to your backyard with some string and mark off an 8×12 space.  You can build your own sauna by sticking it against your garage, or tucking it in a quiet corner in your backyard.  When you choose the location for your backyard sauna, keep in mind that you may want to allow for a nice courtyard or patio space.  Bring a couple patio chairs and maybe a picnic bench to complete the simulation.

Step two: Before you build your own sauna, imagine what your own sauna party will be like.  Family, friends, business associates or the whole hockey team?  When you build your own sauna, consider inviting your sauna party friends to help frame it up.

Step three: Go for it, and start enjoying your own authentic Finnish sauna.  Click here to learn how to prep your area for the sauna

8×12 Sauna Building Materials List
Subfloor qty price extended
rim joist 2×6-12′ green 2 $5.58 $11.16
floor joists 2×6-8′ green 10 $3.54 $35.40
sub floor 3/4” 4×8 AC2 3 $28.00 $84.00
Walls
wall studs 2×4-7′ studs 43 $1.48 $63.64
treated plate 2×4-12′ green 2 $4.58 $9.16
treated plate 2×4-8′ green 2 $2.29 $4.58
top bottom plate 2×4-12′ 2 $2.47 $4.94
top bottom plate 2×4-8′ 2 $1.68 $3.36
wall sheeting 1/2# 4×8 CDX plywood 13 $11.14 $144.82
siding 3/4x 8-8′ cedar beveled siding 26 $8.48 $220.48
siding 3/4x 8-12′ cedar beveled siding 26 $8.48 $220.48
Roof
truss 2×6-12′ 8 $5.00 $40.00
ridge beam 2×6-16′ 1 $6.48 $6.48
roof sheeting 1/2# 4×8 CDX plywood 7 $11.14 $77.98
shingles 25 year 6 $23.65 $141.90
felt 15# underlay 1 $21.80 $21.80
soffit 16”x12′ pro vented soffit 5 $15.58 $77.90
fascia 6”x12′ r/s fascia 6 $10.49 $62.94
trim 12′ j-trim 1 $8.23 $8.23
Interior
insulation R11 3.5x15x40′ 50 sf roll 14 $10.69 $149.66
bubble wrap 48”x25′ Reflective bubble stndrd edge 6 $31.48 $188.88
wall cedar 1×6-8′ WP-4 cedar (sqft=lftx.42) 68 $10.39 $706.52
roof cedar 1×6-8′ WP-4 cedar (sqft=lftx.42) 17 $10.39 $176.63
benches 2×4-6′ cedar 38 $4.86 $184.68
sauna floor 1/2”x3′x5′ durock 4 $8.49 $33.96
Hardware/etc.
finish nails 1-1/4” nail 11b aluminum white 1 $8.23 $8.23
door E-10 half lite door PH 32×80 LH DB 1 $194.00 $194.00
window 24×36 Jeldwen Vnl Rep DH Low-E 1 $124.00 $124.00
lights 3 lights: sauna, chnging room, outside 3 $8.00 $24.00
switches 3 switches, one dimmer (sauna room) 3 $2.00 $6.00
electric wire, outlet, etc. 1 $5.00 $5.00
Stove
sauna stove Kuuma wood 1 $850.00 $850.00
reflective panels Kuuma side and back 1 $140.00 $140.00
water tank stainless steel 1 $200.00 $200.00
pipe 36” steel snap 2 $24.00 $48.00
flashing kit 14.5” 1 $89.00 $89.00
chimney 3′ double ins. 1 $155.00 $155.00
chimney cap aluminum rodent seal 1 $48.60 $48.60
total materials…… $4,571.41
labor…. $2,345.00
dealer prep, clear coat BS $33.59
total….. $6,950.00

Hand made log sauna

There is a hand made log sauna that sits amongst 80-100 year old red and white pines on Pine Island, Lake Vermilion, Minnesota.  As impressive as this sauna is, the story behind it is as compelling.

In 1992, Harland Siiro delivered $5,000 worth of cut cedar trees to the land: an aggressive stand at his dream of building his second hand made log sauna.  He considered this a family event, with plans to enlist his son Matt in the traditional build.  But the logs sat, and years past.   They sat, collecting ants and some early signs of decay.cedar logs not part of the hand  made cedar log sauna Harland Siiro had developed heart problems, then Diabetes a terrible illness that started cramping his legs, stifling his mobility.  It became hard for him to get to the cabin, let along move 200 pound cedar logs.   Building a hand made log sauna was way down on the priority list for his son Matt.  Matt looked at the pile of logs as nothing more than drudgery.

As Harlan’s health deteriorated, however, it became clear to Matt that building this sauna was something critical for his father.   Matt enlisted help from Scott Rodgers, a smart choice as Scott was a body builder, able to bench press 4 cylinder vehicles.  Scott eyed the 18′ and 24′ cedar logs and saw only branches.  With Scott’s help, Matt was actually making progress, scribing and setting a few rows of the cedar structure.

Back home, Matt was able to bring some bright news to his Dad, as progress being made on the hand made log sauna.   Even with Scott, scribing and laying each log was draining work.  The work not well suited for a busy guy with small windows of time at a cabin.  The demands on Matt during  sauna construction were many:  two small children, busy career with minimal vacation time, six hour drive to the cabin, and usually less than 48 hours at the cabin.  The work dragged on, one log at a time, one row at a time, spanning over many short visits to Lake Vermilion.  No fishing for Matt, just grinding work.

Then something terrible happened: his best friend and log hauler buddy Scott unexpectedly passed away.  Scott and his father were the key motivators for Matt to complete the sauna, and as an odd twist of fate, the unexpected one died first.  Instead of dragging out the log sauna construction, Matt applied more vigor.  The walls were completed in fall 2006.  The project became more passionate to Matt.  As his father’s health became worse, Matt applied more energy and sneaking in more valuable time at Lake Vermilion working on the log sauna.

The precious hours on Lake Vermilion took on feverish focus.  Fishing or relaxing with his wife and two children took even more of a back seat.  As Matt gained momentum, somewhere between the last course of logs and the roof, something else, unexpected crept into Matt: Joy.

hand made cedar log sauna

Father Siiro, either by luck or design, had assigned his legacy to his son: a hand made cedar log sauna.  More than the sauna itself, though, Matt is able to look at his success and see the personality of his father and his best friend Scott.

FOOTNOTE:  Father Siiro was never able to experience his sauna.  He passed away around the same time that his son, Matt, was on the roof, shingling.  Rains fall from the heaven’s above, and two people dear to Matt’s heart have spirit within the warm cedar walls of this hand made log sauna.

A nice foot mat for your oudoor backyard sauna

easy-outdoor-wood-shower-stand

Here’s a simple foot friendly outdoor sauna foot mat.  I especially like standing barefoot on this cedar slat mat in winter time.  The snow, ice, and cold water seep into the ground and my feet stay fairly dry.  Nicer than plastic.  Just rip some slats from a cedar board or maybe purchase some 1×1 or 2×2 cedar boards from a lumber yard, attach a couple cross supports underneath with a finish nailer, et voila.


The perfect size outdoor sauna

Here’s a 3-D picture of a pretty good mobile sauna.

3d-outdoor-sauna-in-paint1

  • 8×12 structure
  • 6×8 sauna room*
  • 6×8 changing room
  • dual benches on either side.
  • stove centered along the back wall.
  • 2×4 framed construction
  • 5/12 roof pitch
  • put a window in your sauna if you have a nice view.

I have been in over 100 saunas, and have sat in every one and have considered what’s good, bad and ugly with the design and construction of each sauna.

Some saunas are two man saunas, and don’t allow for a good sauna party.  Some saunas are bigger than a four man sauna and take too long to heat up, use too much wood, or the loyly (steam rising from tossing water on the rocks) never reaches you.  With divine proportion, according to the Greeks and confirmed by Da Vinci (thanks Matt), this is my ultimate sauna plan.

This design uses North American standard measurements, minimizing waste in construction and allowing for full cuts of material.  This design gives you a changing room, a critical space for privacy, having a beer between rounds, and a buffer for temperature extremes in cold climates.

TIP:  Frame the interior wall with 2×2′s vs. 2×4′s.  It is non load bearing, and the extra 2″ sure is valuable!

EXTRA TIP:  * The interior wall can be nudged slightly to allow for a slightly bigger sauna room (say 6’2″x7’4″ interior dimensions).  Four people can fit nicely along a 6’2″ bench, and it’s nice to lay along your sauna bench.  Remember, though, you’ll be having dual benches, a comfy sauna and ample changing room is the goal.   Having a bunch of people over for a sauna party?  don’t sweat it!  click here for the sauna party equation.


Saunas: the power of the number three

There are so many “threes” relating to saunas:

1514472-sauna_view-joensuu

Three major attributes of saunas.

  1. Health and Wellness
  2. Escape
  3. Fun

Three sauna rounds make for a complete sauna.

  1. Round 1: heat up and cold rinse
  2. Round 2: induce loyly (steam), sweat heavy, and cold rinse
  3. Round 3: sweat heavy, muscle stretch, skin cleanse and clean rinse

When you build your own sauna,  consider the three zones for optimal sauna enjoyment

  1. sauna room: 7′ high ceiling max.  optimize your cubic footage, consider bench height.
  2. changing room: lots of hooks, music and small fridge for cold water and beverages, good flow.
  3. outdoor patio: outdoor shower, nice sitting area to chill out and look at the stars, privacy, buffer.

Three beers make for a good sauna party.

Three guests make for a fun sauna party.

Three hours is about how long a good sauna party lasts.

Ever heard the one about fish and guests both start to stink after three days?   3 saunas a week can minimize this.

An outdoor shower for your home sauna, about $15 from any hardware store

I’ve seen outdoor showers for $150 in catalogs.  Granted some have nice walls around them and a soap dish, but you can build a nice private surround on your own.  They all hook up to a garden hose, so I got to thinking, why buy something fancy?  So here’s what I did. I think it functions better, and feels more natural than a free standing unit.  Follow these 9 easy steps:

1. Locate a tree or overhang where you want the shower.

2. Measure hose length needed from shower head to shut off valve (about waist high) along the length of the tree:

measure-hose-length-for-outdoor-shower3

3. Find a hose from the garbage or scrap piece somewhere.  Or if necessary, buy a 15′ hose at Home Depot for about $12.00.  I used a grey hose and it blends in nicely with the tree trunk.

4. Cut one end of your hose to size.

cut-your-hose-to-length for your outdoor shower

5.  Go to hardware store and have them attach a fitting to the cut end ($3.00).

hose-at-hardware-store2 for your outdoor shower

6. Attach a hose nozzle, set on “shower” or “center” mode (do not use “jet” mode unless your body is thick with rust).

any-old-garden-hose-nozzle for your outdoor shower

7. Secure your hose along the tree branch with a few twist o ties.

8. Attach other end of hose along the base of the tree to this shut off valve, from any hardware store ($5.00).

toro-on-off-hose-attachment-from-any-hardware-store for your outdoor shower

9. Connect the other end of this shut off valve your garden hose, et voila!

enjoying your own outdoor shower

Sauna book by Brian Peterson

sauna-sell

Here is a transparent chronology of the construction of a Finnish Sauna, wonderfully illustrated by professional photographer Brian Peterson.  Brian captures the organic elements of sauna: wood, fire, water, rocks and presents the reader with his soulful creation: building his dream sauna ‘up north.’   Brian’s passion for sauna is deep in the pages.  He recognizes that an image, a photo, can bring to life sauna culture and he wants to share it with you in his new book.

Whether you’re considering building your own authentic Finnish sauna, or just appreciate the sauna experience from a visual perspective, Brian’s book is for you.  Would make for a nice gift, along with a sauna bucket and thermometer.

Here is a word from Brian:

“This book is a step-by-step visual guide to building a traditional Finish sauna. You will find pictures of every step in the process that will help you make your own plans and give you ideas for construction. I built my sauna with no blueprints, I looked at many saunas over the years and built ours from scratch with ideas from many. This book will help you in the process of building your own unique sauna building.”

Here’s a link where you can view his book in more detail.

Build then move a sauna

If you can move a 3 bedroom house, surely one can get an 8×12 sauna structure moved into your backyard.

Consider the option of having an 8×12 free standing sauna built off sight, then having it delivered to your backyard.  No nails on the grass, no builders using your bathroom or leaving empty Mountain Dew bottles in your backyard.

Order a sauna on a Tuesday, have a sauna party that Friday night!

OR check out these mobile saunas….from the mobile sauna fleet and the wild canadian DJ posse at www.saunasessions.ca