Sauna designer

Set the inside size and turn the sauna in 3D. Benches at the heights heater makers ask for, the heater sized to the room, the vents laid out and every board, batt and screw priced.

6' x 7' outdoor cabin, electric9 of 9 checks OK

100%

Inside: 6' x 7'
Volume: 294 cu ft
Seats on top: 3
Heater: 8 kW

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The room

Where

Inside width

Inside depth

Ceiling height

84 to 90 in heats best. The benches run along the back wall; the door and the heater share the front wall.

Heat and benches

Heat

Benches

Bench shape

Boards and door

Wall and ceiling boards

Door

Your sauna, priced today

$8,490

Materials and heater, store prices read Sep 30 to Oct 9, 2026. Plus 5 lines to price locally, including the electrician.

Inside: 6 ft x 7 ft x 7 ft
Footprint: 7 ft 2 in x 8 ft 2 in
Volume: 294 cu ft
Seats: 3 on the top bench
Heater: Harvia 8 kW

Builder's plan $39

The PDF for this exact sauna: checks with sources, plan and section, heater, power and air, the priced materials list, the cut list and the build sequence. One payment, no subscription.

If our plan has an error, we fix it or refund you.

The heater

Harvia KIP 8 kW, built-in controls, stones

8 kW, rated 250 to 425 cu ft. Your room: 294 cu ft.

33.3 A at 240 V. Conductors for 41.7 A or more (125 percent), breaker and wire from the heater manual, by a licensed electrician.

$1,317.00 at Haven of Heat

HUUM DROP 6 kW package, UKU Wi-Fi control, stones also fits, $3,150.00.
HUUM DROP 7.5 kW package, UKU Wi-Fi control, stones also fits, $3,316.00.
HUUM DROP 9 kW package, UKU Wi-Fi control, stones also fits, $3,395.00.
Homecraft H-Series 6 kW heater only also fits, $1,211.00.
Homecraft H-Series 7.5 kW heater only also fits, $1,238.00.

Checks

OKCeiling height7 ft79 to 91 in (2.0 to 2.3 m); never under the heater's minimum room height of 6.56 ft. HUUM
OKTop bench to ceiling46 in43 to 51 in (1100 to 1300 mm). HUUM
OKLower benchtop at 20 in18 in step below the top bench, 15 to 22 in off the floor (our default). Our default.
OKSeats on the top bench3 at 24 in eachAbout 24 in (60 cm) of bench per person. Harvia
OKFloor in front of the benches41 in30 in or more to stand and reach the benches (our default); under 24 in fails. Our default.
OKRoom for the heater and its clearances41 in23-3/4 in: 3/4 in front and 1-3/8 in side per Harvia's KIP data; confirm in your model's manual, the heater, and 12 in to pass. Harvia
OKHeater wall fits the door and the heater72 in67-1/2 in: heater with its guard and side clearances, 12 in to pass, door rough opening and trim. Harvia
OKHeater to ceiling54 in43-1/4 in or more from the heater top to the ceiling (maker's data; heater top taken at about 30 in). Harvia
OKHeater sized to the room294 cu ft, Harvia 8 kW for 250 to 425Room volume, plus 1.2 m3 for every m2 of glass, inside the heater's rated range; we pick the next size up past 90 percent of a range (our default). Harvia
NoteVentilationIntake low by the heater, exhaust low on the opposite wall, drying vent highSupply 2 to 4 in, exhaust twice that, about six air changes an hour. HUUM
NoteElectrical circuit33.3 A at 240 V; conductors for at least 41.7 A125 percent of the heater load; breaker and wire per the heater's manual, installed by a licensed electrician. NFPA 70, National Electrical Code
NoteDoorBuilt cedar door, opens outOpens outward, no lock or latch that holds it shut. Our default.

Plan and section

PlanSection

Materials and prices

Each line names the store and the day we read its price. Freight, tax and your local prices will differ.

Qty	Item	Store	Total
Site and floor			$705.81
2 pc	4x6 PT x 10 ftskids	Home Depot, Bronx Terminal, 2026-09-30	$38.76
8 pc	10-3/4 x 10-3/4 x 7-3/4 in. Concrete Deck Block4 under each skid	Home Depot, Bronx Terminal, 2026-09-30	$83.76
32 bag	Pavestone 0.5 cu. ft. Paver Base6 in compacted base, 2 x 2 ft, under each deck block (16.0 cu ft)	Home Depot, Hamilton Mill, 2026-10-08	$207.04
1 roll	VEVOR 6 ft x 300 ft Weed Barrier Landscape Fabricunder the whole footprint, against weeds	Home Depot, Bronx Terminal, 2026-09-30	$49.97
8 pc	2x6 PT x 8 ftfloor joists and rims	Home Depot, Hamilton Mill, 2026-10-08	$77.44
2 pc	2x6 PT x 10 ftfloor joists and rims	Home Depot, Hamilton Mill, 2026-10-08	$24.56
3 sheet	Plytanium 23/32 in. x 4 ft. x 8 ft. Tongue and Groove Plywood23/32 T&G floor, laid across the joists	Home Depot, Hamilton Mill, 2026-10-08	$151.41
5 tube	Liquid Nails Subfloor and Deck 28 oz Construction Adhesiveglue the floor to the joists	Home Depot, Bronx Terminal, 2026-09-30	$38.40
1 box	Grip-Rite #8 x 2 in Exterior Wood Screws, 5 lb boxscrew the floor every 6 in at edges, 12 in in the field	Home Depot, Bronx Terminal, 2026-09-30	$34.47
4 pc	Tie-downs or ground anchors for the skids, sized for your wind and frost conditionsask your building department	price locally
Framing			$580.90
47 pc	2x6 x 8 ftstuds, plates, cripples	Home Depot, Hamilton Mill, 2026-10-08	$405.14
2 pc	2x6 x 8 ftdoor header	Home Depot, Hamilton Mill, 2026-10-08	$17.24
7 pc	2x6 x 8 ftceiling joists	Home Depot, Hamilton Mill, 2026-10-08	$60.34
2 pc	2x6 x 8 ftblocking for bench ledgers and heater	Home Depot, Hamilton Mill, 2026-10-08	$17.24
3 box	Fas-n-Tite 3-1/2 in 16d Hot-dipped Galvanized Common Nails, 5 lb (223)framing nails (or the equivalent in your nail gun's collated nails)	Lowe's, Atlanta-Edgewood, 2026-10-08	$80.94
Shell and roof			$1,290.24
16 pc	2x6 x 8 ftrafters	Home Depot, Hamilton Mill, 2026-10-08	$137.92
1 pc	2x8 x 10 ftridge	Home Depot, Hamilton Mill, 2026-10-08	$12.82
2 pc	2x6 x 8 ftgable studs	Home Depot, Hamilton Mill, 2026-10-08	$17.24
16 pc	Simpson Strong-Tie H2.5A ZMAX Hurricane Tieone per rafter at the wall	Home Depot, Bronx Terminal, 2026-09-30	$15.68
3 sheet	OSB 7/16 in. 4 ft. x 8 ft. Sheathing Panelroof deck	Home Depot, Hamilton Mill, 2026-10-08	$40.89
1 roll	TAMKO Synthetic Guard 42 in x 286 ft Synthetic Roof Underlaymentsynthetic underlayment	Lowe's, Atlanta-Edgewood, 2026-10-08	$108.00
6 panel	Union Corrugating Master Rib 3.17 ft x 8 ft Galvalume 29-Gauge Roof Panel (36 in cover)3 across x 1 up each side, cut to 4 ft 10 in	Lowe's, Atlanta-Edgewood, 2026-10-08	$239.88
1 pc	Union Corrugating 14 in x 126 in Steel Roof Panel Ridge Capridge	Lowe's, Atlanta-Edgewood, 2026-10-08	$34.98
1 box	Power Pro #10 x 1-1/2 in Self-drilling Roofing Screws, 250-countabout one per sq ft	Lowe's, Atlanta-Edgewood, 2026-10-08	$29.98
4 pc	Union Corrugating 2.38 in x 10 ft Galvanized Drip Edgeeaves and rakes	Lowe's, Atlanta-Edgewood, 2026-10-08	$24.32
10 sheet	Plytanium Plywood Siding Panel T1-11 8 in. OC, 19/32 in. x 4 ft. x 8 ft.T1-11 over the studs, plus the two gables	Home Depot, Hamilton Mill, 2026-10-08	$467.80
1 roll	House wrap (water-resistive barrier) behind the siding, if your code requires itprice at your store	price locally
1 lot	Corner, door and fascia trim (1x4 and 1x6 exterior trim) and soffitprice at your store	price locally
2 pc	Two screened gable vents for the attic space above the ceilingprice at your store	price locally
3 pc	Exterior vent hoods with insect screen for the sauna intake and exhaustprice at your store	price locally
1 box	Grip-Rite 2-1/2 in 8d Galvanized Spiral Shank Siding Nails, 5 lbsiding nails	Home Depot, Bronx Terminal, 2026-09-30	$18.87
1 gal	Zinsser Bulls Eye 1-2-3 1 gal Exterior Primerone coat	Home Depot, Hamilton Mill, 2026-10-08	$29.98
2 gal	BEHR PREMIUM PLUS 1 gal Exterior Paint and Primertwo coats	Home Depot, Hamilton Mill, 2026-10-08	$99.96
4 tube	DAP Alex Plus 10.1 oz Acrylic Latex Caulk Plus Siliconetrim and door	Home Depot, Hamilton Mill, 2026-10-08	$11.92
Insulation and vapor barrier			$987.62
5 bag	ROCKWOOL Comfortbatt R23, 5.5 x 15.25 x 47 in, 39.8 sq ft per bag (sold 12 bags for 1,288.73 USD)walls, 178 sq ft	Superarbor, 2026-10-09	$536.95
2 bag	ROCKWOOL Comfortbatt R23, 5.5 x 15.25 x 47 in, 39.8 sq ft per bag (sold 12 bags for 1,288.73 USD)ceiling, 45 sq ft	Superarbor, 2026-10-09	$214.78
1 roll	ProSaunas Vapor Barrier Foil, 48 in x 80 ft (aluminum-faced kraft, rated over 200 F)foil face in, laps 2 to 3 in, 257 sq ft with laps	The Sauna Heater, 2026-10-09	$92.90
1 roll	Prosaunas Aluminum Tape, 2 in x 164 ftevery seam and every hole	Haven of Heat, 2026-10-09	$49.99
39 pc	1x2 x 8 ftair gap behind the boards	Home Depot, Hamilton Mill, 2026-10-08	$60.06
3 box	GRK #8 x 1-1/4 in Trim Head Screws, 100-packfurring through the foil	Home Depot, Hamilton Mill, 2026-10-08	$32.94
Interior lining			$2,272.40
95 board	Western red cedar 1x6 tongue and groove, select tight knot, 8 ft86 boards on the cut plan + 10 percent	Twin Creeks Log Home Supply, 2026-10-09	$2,272.40
1 box	Stainless steel 1-1/2 in finish nails or 18 ga stainless brads (galvanized can stain cedar)blind-nail through the tongue; about 1 lb per 100 sq ft	price locally
Benches			$380.06
11 board	Western red cedar 2x4 S4S, select tight knot, 8 ft11 slats	Twin Creeks Log Home Supply, 2026-10-09	$259.60
10 pc	2x4 x 8 fthidden bench frames and door core (kiln-dried; use cedar if you want no pine in the room)	Home Depot, Hamilton Mill, 2026-10-08	$42.50
2 board	Western red cedar 2x4 S4S, select tight knot, 8 ftheater guard	Twin Creeks Log Home Supply, 2026-10-09	$47.20
2 box	GRK #8 x 2-1/2 in Trim Head Screws, 100-packdrive slat screws from underneath so no metal touches skin	Home Depot, Hamilton Mill, 2026-10-08	$30.76
Door			$273.70
3 board	Western red cedar 2x8 S4S, select tight knot, 8 ftdoor jambs	Twin Creeks Log Home Supply, 2026-10-09	$171.60
8 board	Western red cedar 1x4 S1S2E trim, 8 ftdoor casing and stop	Twin Creeks Log Home Supply, 2026-10-09	$73.60
3 pc	Everbilt 8 in. Heavy-Duty Tee Hingehung to swing out; rough opening 27-1/2 in x 75 in, 1/2 in gap under the door	Home Depot, Hamilton Mill, 2026-10-08	$28.50
1 pc	Roller or magnetic catch (never a lock)price at your store	price locally
2 pc	Wooden handles, inside and out (cedar offcut)from the bench offcuts	price locally
Heater and ventilation			$1,701.00
1 pc	Harvia KIP 8 kW, built-in controls, stones8 kW, rated 250 to 425 cu ft	Haven of Heat, 2026-10-09	$1,317.00
2 pc	Thermory Thermo-Aspen Sauna Room Vent with Sliding Gate, 11 x 5.2 inintake (adjustable) and drying vent	Haven of Heat, 2026-10-09	$192.00
2 pc	Thermory Thermo-Aspen Sauna Room Vent Grille, 7.5 x 5.9 inexhaust, twice the intake area	Haven of Heat, 2026-10-09	$192.00
Lighting			$298.35
1 kit	Prosaunas White Sauna Light Kit, 16 ft LED strip, rated to 200 F, IP67under the top bench or behind a backrest, low voltage	Haven of Heat, 2026-10-09	$298.35
Electrical
1 job	Dedicated 240 V heater circuit, conductors for 41.7 A or more, breaker and wire gauge from the heater's manuallicensed electrician and permit	price locally
1 job	Cable inside the hot room rated as the heater manual specifies (often 90 C / 194 F or more, never ordinary PVC cable); disconnect near the heater and GFCI only where your code and the manual call for themlicensed electrician	price locally
1 job	Light feed with the LED driver and switch outside the hot roomlicensed electrician	price locally
Optional (not in the total)
1 pc	KOLO sauna thermometer, 70 to 240 F	Haven of Heat, 2026-10-09	$99.00
5 pc	Scandia Red Cedar 2 x 2 ft Duckboard Sauna Flooringremovable floor slats over the open floor	Haven of Heat, 2026-10-09	$649.95
Total priced			$8,490.08

Cut list 37 lines

Mark	Part	Material	Length	Qty
S	Wall studs	2x6	81 in	33
J	Jack studs, door	2x6	73-1/2 in	2
H	Door header, 3 plies of 2x6	2x6	30-1/2 in	3
HF	Filler over the door header, ripped to 2 in high, one per header ply	2x6	30-1/2 in	3
P	Top plates, doubled (front and back run full length)	2x6	86 in	4
P	Top plates, doubled	2x6	87 in	4
B	Bottom plates, front (cut out at the door) and back	2x6	86 in	2
B	Bottom plates, side walls	2x6	87 in	2
CJ	Ceiling joists, 16 in on center	2x6	86 in	7
BK	Blocking between studs at bench ledger height	2x6	14-1/2 in	10
BK	Blocking behind the heater and the guard	2x6	14-1/2 in	2
SK	Skids on deck blocks	4x6 PT	98 in	2
FJ	Floor joists, 16 in on center	2x6 PT	83 in	8
R	Rim joists	2x6 PT	98 in	2
RF	Rafters, 16 in on center over each ceiling joist (nail joist to rafter heel), 4/12	2x6	61 in	16
RB	Ridge board	2x8	98 in	1
GS	Gable end studs (cut to the rafter line), each gable	2x6	14-3/8 in	12
F	1x2 furring over the foil on every stud and joist (3/4 in air gap)	1x2	96 in	39
L	Wall boards, horizontal, 17 rows of 5 in cover	Western red cedar 1x6 tongue and groove, select tight knot	72 in	19
L	Wall boards, side walls	Western red cedar 1x6 tongue and groove, select tight knot	84 in	34
L	Wall boards beside the door (cut to fit each side)	Western red cedar 1x6 tongue and groove, select tight knot	40 in	30
LC	Ceiling boards, running front to back	Western red cedar 1x6 tongue and groove, select tight knot	84 in	15
UB	Top bench slats, 6 across with 1/2 in gaps	Western red cedar 2x4 S4S, select tight knot	71-1/2 in	6
BF	Top bench frame: wall ledger and front rail	2x4	71-1/2 in	2
BF	Top bench cross supports	2x4	22 in	4
BL	Top bench legs, front, one per support	2x4	33 in	4
LB	Lower bench slats, 5 across with 1/2 in gaps	Western red cedar 2x4 S4S, select tight knot	71-1/2 in	5
BF	Lower bench frame: front and back rails (free-standing, not on the wall)	2x4	71-1/2 in	2
BF	Lower bench cross supports	2x4	18 in	4
BL	Lower bench legs, front and back at each support	2x4	15 in	8
G	Heater guard rails, keeping the heater's clearances	Cedar 2x4	27 in	2
GP	Heater guard posts	Cedar 2x4	36 in	2
D	Door core stiles (rails: 3 at 17 in), boards on both faces	2x4	72 in	2
DJ	Door side jambs, ripped to wall depth (1-1/2 in thick)	Cedar 2x8	74-1/2 in	2
DJ	Door head jamb	Cedar 2x8	27 in	1
DT	Door casing, both faces (sides and head)	Cedar 1x4	79 in	4
DS	Door stop, ripped from 1x4 (sides and head)	Cedar 1x4	75 in	2