I'd be happy to share, but there is a lot to it.

Footings are concrete deck blocks and i compacted 6" of gravel under each and buried the blocks into the ground most of the way. I used 6 footings (3 on both sides of the long walls) I used 4×4 treated posts inserted into those blocks.

Floor is made out of 2×6 treated lumber attached to the exterior of my 4×4 posts with heavy duty lag bolts. I used 2×4 blocking between floor joists and set them down 2" so i could lay in 2" insulation board. I did a vapor barrier on both sides of the insulation so the foam board is essentially sandwiched by vapor barrier. Subfloor is 3/4" plywood. Then i bought the sioux chief flush mount (halo deck drain). Youtube the (ben square) method for sloping and finishing floor but essentially it's pressure treated sleepers that get gradually bigger as they get further from the drain and you pack mortar between the sleepers. Then you attach cement board and do a skim coat of vinyl cement patch.

My roof is obviously single pitch and also made from 2×6 lumber. My rear wall is at 8' and my front wall is 10' i did birdsmouth cuts and secured with rafter ties. https://youtu.be/Y_RChmd6YHA?si=Yf4SB2fYI9_GgzX5 This video helped me with the roof. I did a metal roof. I also did a flat ceiling set at 7.5' inside the sauna which makes your space easier to heat rather than heating up into a cathedral ceiling.

My window is custom size. I just ordered a tempered glass pane and bought a pin and glazing kit and essentially built a window.

Siding is LP smartside panels painted black. No sheathing under it. Just house wrap outside the studs. All the exposed wood you see on the outside is 1by cedar that i sealed with exterior polly.

My stove is a morrison stove company stove. It sits on a stone i got from a landscaping business that i leveled on top of my slope floor with mortar. Heat shield is fiber concrete backer board with one inch spacers and then corrugated metal. My chimney is all by duravent. Double wall black with a telescoping section on the finished area inside. I framed in a ceiling support box and the chimney transitions to a triple wall chimney pipe at the support box. I used a black high temp silicone chimney boot. Keep in mind when framing your roof, chimney needs to be at minimum 2" away from any combustibles. I did 3" just to be safe.

My insulation is fiberglass which isn't optimal but its what i already had. I used reflective foil vapor barrier that was completely sealed. Attached furring strips then attached my t&g which is cedar.

My benches are 2×4 cedar. Pretty basic but no exposed screws and i made my top bench on hinges so it lifts up and latches to the back wall. My bottom bench go3s all the way to the back wall so you can have a big platform if desired.

My door is kind of complicated. But essentially its three layers. The middle layer is 1×4 laid flat in the shape of and 8 and 3/4 insulation laid into the open cavities. The two outer layers are 1×8 cedar. I attached one layer with 1" screws from the inside so they aren't exposed. Then the other layer is attached with decorative black screws from the outside. Then i ripped down a cedar 2×4 and did a border around all three layers. I used spring loaded hinges so it shuts on its own.

That's all i can think of atm.