Thermo-Aspen Sauna Wood | Paneling, Benches & Trim

Thermo-Aspen paneling, bench wood and trim

Paneling: 1x4 and 1x5 STS4 nickel gap, 2x3 Grace large gap and 1x3 Groove-S.
Bench wood: 2x3, 2x4, 2x6 and 3x3.
Trim: inside and outside corners, door trim, T-molding, 1x1, and square and rectangular 2x2.

ProSaunas selects straight-grained Thermo-Aspen with a uniform texture and says it does not secrete resin, splinter or overheat. Apart from the thermal treatment the boards are unfinished. The same profiles in untreated wood are on the aspen sauna wood page.

Thermo-Aspen sauna wood next steps

Comparing woods: every species, paneling profile and bench size is on the sauna wood page.
Planning the room: doors, windows and lighting are in sauna building materials.
Not sure how much to order: send your room size to Topture's Lifetime Expert Support.

Reviewed October 2026

Frequently Asked Questions

What is Thermo-Aspen?

Thermo-Aspen is aspen that ProSaunas thermally modifies with heat, steam and pressure and no chemicals, which gives it a golden brown color. Apart from that treatment the boards are unfinished.

Can a whole sauna be built in Thermo-Aspen?

Yes. Thermo-Aspen comes as paneling, bench wood and trim, so walls, ceiling, benches and corners can all match.

How is sauna wood shipped?

Sauna wood ships to the contiguous US at one flat freight rate per order, set by the number of boards across all the sauna wood in the cart and the length of the longest board. The rate table is in the Shipping tab on every sauna wood page. Boards over 10 ft and orders of 1,000 boards or more are quoted after you order.