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Sauna Doors
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WHY CHOOSE NORTHERN LIGHTS?
100% Clear Western Red Cedar
Cedar has long been the premier sauna wood. Clear Cedar has no knots ensuring the longevity of our product products
Electric - Wood Fired - Infrared
The most heating choices to build your sauna. Choose from wood fired, infrared or our surgical stainless steel electric sauna heaters
Best Warranty
Our commitment to quality has been the conrner stone of our success. Our barrel saunas come complete with a full 5 year warranty.
Customer Support
We are Sauna Enthusiast first and foremost. Give us a call and let us help discuss all your sauna needs.
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A proper sauna door does three jobs: it seals the heat in, it tolerates 170°F and high humidity without warping, and it opens outward so you can never be trapped inside. Standard residential doors fail at all three — particle-core swells, weatherstripping melts, and most are pre-hung to swing inward. We sell one purpose-built sauna door: a solid red cedar slab with a tempered glass insert and a vent grille, sized to fit any of our DIY sauna kits and barrel saunas.
Why a dedicated sauna door matters
Three things kill a non-sauna door fast. First, hollow-core or MDF cores absorb steam, swell, and bind in the jamb within a season. Second, vinyl weatherstripping softens above 140°F and stops sealing. Third, the hinge side of an inward-opening door wedges against the bench if anyone leans on it — a real hazard if someone faints. A solid cedar slab on outward-swinging hinges with high-temp gasket avoids all three.
What you get with our solid red cedar sauna door
The door is a solid 1-3/4 inch western red cedar slab, finger-jointed for stability so it won't warp under heat cycling. The glass insert is tempered to BS 6206 / ANSI Z97.1 — won't shatter if the sauna gets bumped during a session. Below the glass is a small vent grille that pulls fresh air in low while hot air exits through the ceiling vent, the classic Finnish convection setup that keeps oxygen levels comfortable during long sessions.
Hardware is non-magnetic stainless steel: hinges, latch, handle, all rated for high-humidity service. The latch is a wooden-handled cabin pull on the inside (cool to grip) and a stainless lever on the outside.
Standard sizing and rough opening
Door slab: 24×72 inches (standard sauna size, smaller than a residential door because the smaller threshold loses less heat). Rough opening: 26×74 inches accounting for the jamb. The door fits any of our DIY pre-cut sauna kits and barrel saunas, and works for retrofits if you adjust the framing to that rough opening.
Swing direction: outward only. This is a safety requirement, not a preference. Code in most jurisdictions requires outward-swinging doors on saunas for the same reason hot tub covers don't lock from the outside.
Installation notes
The door ships pre-hung in its own jamb. You frame the rough opening, slide the jamb in, shim level and plumb, and screw through the jamb into the studs. The high-temp gasket is already attached. Plan on 1-2 hours for the install if your rough opening is square. The toughest part is making sure the threshold sits level so the door swings cleanly without scraping.
Care and longevity
Wipe the cedar slab down occasionally with a damp cloth; that's it. Don't varnish or seal the interior side — sealants outgas at sauna temperatures. The exterior side can take a light cedar-oil treatment every couple of years if it's exposed to weather. Expect 20-25 years of service from the slab itself; the hinges and latch may need occasional tightening.
Frequently asked questions
Why must a sauna door swing outward?
Safety. If someone faints or feels dizzy inside, they may slump against the door. An inward-swinging door becomes blocked by the body; an outward-swinging door doesn't. Most building codes require this for any heated bathing enclosure.
Can I use a regular interior door for my sauna?
You'll regret it. Hollow-core or MDF doors swell from the humidity within a season and bind in the jamb. Solid wood doors without a glass insert are heavy and don't let you check on someone inside. The cost saving disappears the first time you have to replace it.
Why is there a vent grille at the bottom of the door?
Sauna convection works by drawing cool air in low and exhausting hot air through a ceiling vent. The door grille is the inlet. Block it and the room feels stuffy at temperature, the heater works harder, and warm-up takes longer.
Will the tempered glass crack from heat shock?
No. The glass tempering process specifically prepares it for thermal cycling. The only failure mode we've seen in 25 years is direct impact (a falling bench board), which the temper handles by crumbling rather than spear-shattering.
Does the door fit retrofits to existing saunas?
Yes, if your rough opening is 26×74 inches. If your existing frame is sized for a residential door (32×80), you'll need to re-frame the opening. Worth doing — the sealing improvement alone cuts heat-up time by 15-20%.
Do you sell glass-only sauna doors?
Not currently. All-glass doors look striking but they're heavier, the hinges are stressed more, and they let heat radiate out more aggressively than a solid cedar slab. Solid cedar with a glass insert is the proven setup.
