Prosaunas Thermo-Spruce Sts4 Tongue-And-Groove Cladding Profile On Black Sauna Wall Boards.
Thermo-Spruce Sts4 Tongue-And-Groove Cladding Profile On Black Sauna Wall Boards.
Prosaunas Thermo-Spruce 1X4 T&Amp;G Sts4 Wall Cladding - Sauna Wood Custom Featured Product Image Using Real Product Photography.
Prosaunas Thermo-Spruce 1X4 T&Amp;G Sts4 Sauna Wall Cladding Dimensions
Prosaunas Thermo-Spruce 1X4 T&Amp;G Sts4 Sauna Wall Cladding
Click to enlarge
Expert help that stays with you

Whether you’re choosing one component or planning the whole room, small details can become expensive problems once installation begins. We know the products we sell and the questions to ask early, helping catch mismatched components, overlooked requirements, and installation issues while they are still easy to fix.

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.

Sauna and heater customers also receive free shipping on sauna accessories for life.

Planning a sauna, or need help with one you purchased from us? Our founders have assembled many of the saunas we sell, visited the manufacturers, and use these products every day. New customers and existing Sauna Marketplace sauna and heater owners can Book a Ben consultation.

Specs
Made in
Model1×4 STS4 Cladding
Size10 Linear Feet, 11 Linear Feet, 12 Linear Feet, 13 Linear Feet, 14 Linear Feet, 2 Linear Feet, 3 Linear Feet, 4 Linear Feet, 5 Linear Feet, 6 Linear Feet, 7 Linear Feet, 8 Linear Feet, 9 Linear Feet, Free Sample
Nominal Thickness1″
Nominal Width4″
Actual Thickness.59″
Wall Coverage3.1″
Weight (per linear foot)1 lb
Gallery
Prosaunas Thermo-Spruce Sts4 Tongue-And-Groove Cladding Profile On Black Sauna Wall Boards.
Thermo-Spruce Sts4 Tongue-And-Groove Cladding Profile On Black Sauna Wall Boards.
Prosaunas Thermo-Spruce 1X4 T&Amp;G Sts4 Wall Cladding - Sauna Wood Custom Featured Product Image Using Real Product Photography.
Prosaunas Thermo-Spruce 1X4 T&Amp;G Sts4 Sauna Wall Cladding Dimensions
Prosaunas Thermo-Spruce 1X4 T&Amp;G Sts4 Sauna Wall Cladding
Click to enlarge

    PROSAUNAS Thermo-Spruce 1X4 T&G STS4 Wall Cladding – Sauna Wood

    The most economical real sauna wood we carry, and the traditional one. Natural Nordic Thermo-Spruce, 1×4 smooth tongue-and-groove, the wood Finland has lined saunas with for generations. Light tone, tight characterful knots, a clean mild scent. It is not thermally modified, so it moves a little more than our thermo woods through the heat-and-cool cycle. We carry it for the budget build and the honest Finnish look. Sold by the linear foot, in lengths up to 14 ft.

    Build Your Quote:

    Price range: $2.35 through $32.96

    Shipping Unloading Notice

    Ships Free With Any Sauna Heater Purchase

    Shipping

    Important: Only select ‘Flat Rate Shipping – $795’ once per order. For all other wood items you add, choose ‘Part of existing shipment’

    Share your selected heater size and add-ons. Prices and availability are confirmed when the link is opened.

    We added you to this product's waitlist and we'll send you an email when the product is available.

    Leave Waitlist

    This product is currently sold out.

    No worries! Enter your email, and we'll let you know as soon as it's back in stock.

    Zero Interest Payments:

    Buy Now, Pay Later with premium financing packages only available on Sauna Marketplace.

    Pay with HSA/FSA:

    We teamed up with FLEX to make HSA/FSA payments easier than ever.

    ProSaunas

    Under two dollars a board to start. The cheapest way into a real wood sauna.

    This is natural Nordic Thermo-Spruce, 1×4 STS4: smoothed on all four sides with a tongue-and-groove edge that locks the boards into a tight, flush wall or ceiling. Light, rustic, with the tight knots that give a Finnish cabin its character, and a mild clean scent. We can mill it up to 14 feet, longer than most European stock runs.

    Why spruce

    Thermo-Spruce, aspen, and alder are what they actually line saunas with across Finland and Estonia, the places that invented the sauna. Cedar is a North American habit, not a global one. Thermo-Spruce is the floor of that European lineup: the most affordable way to get a genuine Nordic look.

    The honest part, because we’d rather you hear it from us: this is natural spruce, not thermally modified. It will move a bit more than our Thermo-Spruce or Thermo-Aspen through the heat-and-cool seasons, and you may see slight gapping over the years. Want the same rustic look with thermal stability? Step up to Thermo-Spruce. It runs a deeper amber, holds tighter, and skips the seasonal movement. Want the lowest price into an authentic sauna? This is the board.

    Specifications

    • Species: Nordic Thermo-Spruce (natural, not thermally modified)
    • Profile: 1×4 STS4 Tongue & Groove
    • Face coverage: 3.1" per board
    • Lengths: up to 14 ft
    • Made in: Estonia
    • Sold by: the linear foot

    Where it goes

    Walls and ceilings. For benches and backrests, most builders move up to aspen, which stays smoother and cooler under bare skin. We can help you mix the two.

    Shipping and samples

    Sold by the linear foot. Shipping is a flat $795 in the continental US, or free with a heater order. Text your name and address to (844) 565-1113 and we’ll send a sample free.

    Call Ben² at (844) 565-1113 if you’d like to talk through the board count before you order.

    Expert help that stays with you

    Whether you’re choosing one component or planning the whole room, small details can become expensive problems once installation begins. We know the products we sell and the questions to ask early, helping catch mismatched components, overlooked requirements, and installation issues while they are still easy to fix.

    Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

    We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.

    Sauna and heater customers also receive free shipping on sauna accessories for life.

    Planning a sauna, or need help with one you purchased from us? Our founders have assembled many of the saunas we sell, visited the manufacturers, and use these products every day. New customers and existing Sauna Marketplace sauna and heater owners can Book a Ben consultation.

    Specs
    Made in
    Model1×4 STS4 Cladding
    Size10 Linear Feet, 11 Linear Feet, 12 Linear Feet, 13 Linear Feet, 14 Linear Feet, 2 Linear Feet, 3 Linear Feet, 4 Linear Feet, 5 Linear Feet, 6 Linear Feet, 7 Linear Feet, 8 Linear Feet, 9 Linear Feet, Free Sample
    Nominal Thickness1″
    Nominal Width4″
    Actual Thickness.59″
    Wall Coverage3.1″
    Weight (per linear foot)1 lb
    Gallery
    Prosaunas Thermo-Spruce Sts4 Tongue-And-Groove Cladding Profile On Black Sauna Wall Boards.
    Thermo-Spruce Sts4 Tongue-And-Groove Cladding Profile On Black Sauna Wall Boards.
    Prosaunas Thermo-Spruce 1X4 T&Amp;G Sts4 Wall Cladding - Sauna Wood Custom Featured Product Image Using Real Product Photography.
    Prosaunas Thermo-Spruce 1X4 T&Amp;G Sts4 Sauna Wall Cladding Dimensions
    Prosaunas Thermo-Spruce 1X4 T&Amp;G Sts4 Sauna Wall Cladding
    Click to enlarge

      PLAN THE WHOLE SAUNA

      The room and heater still have to work as one system.

      Start with the room dimensions, then account for glass, masonry, insulation, ceiling height, required clearances, and available electrical service. That is how we move from a product that looks right to a sauna that heats evenly and comfortably.

      Compare sauna heaters

      See electric sauna heaters by output, stone mass, control style, and installation type. Size from adjusted room volume, not floor dimensions alone.

      Shop sauna heaters

      Shop complete saunas

      Explore indoor and outdoor saunas when you are planning beyond one component. Starting with the room makes heater size, controls, and accessories easier to get right.

      Explore complete saunas