Natural spruce is the budget wall board: knotty and pale, milled by ProSaunas in tongue and groove for walls and ceilings. It is not thermally modified, so it moves more than thermo-spruce, the same wood made stable with heat and steam. Use it where cost matters most and the room is well ventilated.

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    ProSaunas natural spruce STS4 tongue-and-groove cladding profile on black sauna wall boards.
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    PROSAUNAS Spruce 1X4 T&G STS4 Wall Cladding – Sauna Wood

    ProSaunas
    $1.33 per linear footFree samples available

    The most economical real sauna wood we carry, and the traditional one. Natural Nordic 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.

    This product has multiple variants. The options may be chosen on the product page