What ProSaunas owners say
Public reviews and notes owners sent our team, word for word. Names are shortened to a first name and last initial, or to initials.
★★★★★“Great communication and service! Really happy with my experience.”
★★★★★“I received our sauna wood order last week and love the product!”
★★★★★“Excellent response times and customer service.”
★★★★★“I couldn't be happier with the service at SaunaMarketplace, Ben was incredibly thorough with his service and expertise and guided me through every step of the purchase process.”
★★★★★“First of all I want to say Ben was fantastic and very informative with all the products on his website. He recommended the Saunum Air and this was the best decision for my 6x8 ft 7 feet high cedar sauna. I got the 7kw with Wi-Fi and the power is plenty. I can take a dry sauna with no water on the rocks or add water and it becomes a steam room. The best part is when you turn the fan on and add water you can sit at lower level and not get too hot or cold. … I have been in saunas most of my life and Saunum changes the game. It is built solidly and pumps out tons of heat. I would recommend this unit big time Saunum hit it out of the park with the fan system. … Before you buy a sauna heater make sure you talk to Ben about this unit and the benefits.”
★★★★★“Great service - easy delivery!”
Here’s the thing about inside corners: the cladding never terminates cleanly on its own. Tongue-and-groove boards meeting at 90 degrees need something to cover the joint, and that something is this. Skip it and the corner looks like a job site. Add it and the room closes.
The alder SI inside corner trim is a simple L-profile, 0.55" by 1.18", designed to sit over the ends of cladding boards where two walls meet at an inside corner. It’s narrow enough to look intentional, wide enough to cover a range of rough endings. Natural alder, same species and tone as the rest of the ProSaunas alder family, E1 certified, milled in Estonia. At $1.36 per linear foot, it’s the least expensive piece in the line.
Why Alder
The main job here is matching. If your walls are alder Grace cladding, your corners should be alder too. The warm reddish-brown, fine grain, and pleasant texture make it an intentional part of the room rather than a contrasting fix. Alder doesn’t overheat, doesn’t bleed resin, and E1 certification means no off-gassing concerns in a hot, enclosed space. The honest note: at this thin section (0.55"), it’s purely a finishing piece. It won’t structurally reinforce the corner or protect against hard impacts. Install it after the cladding is complete and dry-fit before fastening.
Specifications
- SKU: PS-ALDER-1X2-INSIDE-CORNER-TRIM-SI
- Species: European Alder (natural)
- Profile: SI inside corner trim
- Thickness: 0.55"
- Width: 1.18"
- Available lengths: 1 ft, 8 ft
- Price: $1.36 per linear foot
- Made in Estonia by ProSaunas
- E1 certified, ultra-low emissions
Where it goes
Inside corners where two cladded walls meet. Plan one run per inside corner from floor to ceiling. Pairs with the VA outside corner trim, UK door trim, and 2×2 S4SEE moulding for a complete alder trim package. Finish the corner before any benches are installed so you have clean access to run the full length.
Shipping and samples
Sold by the linear foot. Flat $795 freight to the continental US, or free with a heater order. Free samples available: text your name and address to (844) 565-1113.
Call Ben² at (844) 565-1113 if you’d like to talk through the board count before you order.
Planning guides: Choosing sauna woodSauna vapor barrier guide
Prebuilt
Brushes, Whisks and Body Care
Vents