{"product_id":"prosaunas-thermo-aspen-wall-material-15-x-90-mm-tongue-groove-sts4","title":"PROSAUNAS Thermo-Aspen Wall Material 15 x 90 mm Tongue \u0026 Groove STS4","description":"\u003ch5\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eThe ProSaunas Thermo-Aspen Tongue and Groove 1x4 STS4 Profile is a precision-milled wall and ceiling cladding that delivers a contemporary nickel-gap aesthetic in a slightly narrower board width than the 1x5 STS4 — offering the same refined Scandinavian character with a finer, more closely spaced visual rhythm across the wall surface. The narrow, angular grooves add depth and dimension to sauna walls and ceilings, creating a sophisticated contrast effect that works particularly well when combined with other ProSaunas profiles or wood types.\u003c\/p\u003e\n\u003cp\u003eCrafted from premium straight-grained Thermo-Aspen with a uniform texture and warm, rich hue, it is comfortable to the touch even in high heat and does not secrete resin or splinter. Thermal modification enhances dimensional stability, water resistance, and resistance to decay, pests, and fungi through a fully organic process using heat, steam, and pressure — with no chemicals involved. ProSaunas selects only premium wood from Northern Europe and Canada, backed by over 55 years of sauna craftsmanship experience.\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eNarrow, angular STS4 grooves create a contemporary nickel-gap aesthetic for sauna walls and ceilings\u003c\/li\u003e\n\u003cli\u003eSlightly narrower 1x4 board width produces a finer, more closely spaced visual rhythm compared to the 1x5 STS4\u003c\/li\u003e\n\u003cli\u003ePrecision-milled to ProSaunas specifications for a consistent, refined Scandinavian profile\u003c\/li\u003e\n\u003cli\u003eCreates a sophisticated contrast effect when combined with other profiles or wood types\u003c\/li\u003e\n\u003cli\u003eThermally modified Aspen does not secrete resin, splinter, or overheat — well-suited for sauna environments\u003c\/li\u003e\n\u003cli\u003eThermal modification enhances dimensional stability, water resistance, and resistance to decay, pests, and fungi\u003c\/li\u003e\n\u003cli\u003eChemical-free modification process for a natural, eco-friendly material\u003c\/li\u003e\n\u003cli\u003ePremium straight-grained Aspen with uniform texture and warm, rich hue for a sophisticated appearance\u003c\/li\u003e\n\u003cli\u003eGreater durability and resistance to warping compared to untreated wood\u003c\/li\u003e\n\u003cli\u003eLighter weight than many traditional sauna woods for easier handling and installation\u003c\/li\u003e\n\u003cli\u003eWood carefully selected from Northern Europe and Canada to meet stringent quality standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eSpecies: Aspen\u003c\/li\u003e\n\u003cli\u003eFinish: Thermally modified\u003c\/li\u003e\n\u003cli\u003eProfile: STS4 Tongue and Groove\u003c\/li\u003e\n\u003cli\u003eWall Coverage: 3.1 inches (80 mm)\u003c\/li\u003e\n\u003cli\u003eProduct Width: 3.54 inches (90 mm)\u003c\/li\u003e\n\u003cli\u003eProduct Thickness: 0.59 inches (15 mm)\u003c\/li\u003e\n\u003cli\u003eShipping Length: Up to 10 feet\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Prosaunas","offers":[{"title":"2' (23-1\/2\")","offer_id":44936777892048,"sku":"WOOD665-2","price":8.76,"currency_code":"USD","in_stock":true},{"title":"3' (35-1\/2\")","offer_id":44936777924816,"sku":"WOOD665-3","price":13.13,"currency_code":"USD","in_stock":true},{"title":"4' (47-1\/2\")","offer_id":44936777957584,"sku":"WOOD665-4","price":17.51,"currency_code":"USD","in_stock":true},{"title":"5' (59-1\/8\")","offer_id":44936777990352,"sku":"WOOD665-5","price":21.89,"currency_code":"USD","in_stock":true},{"title":"6' (71-1\/4\")","offer_id":44936778023120,"sku":"WOOD665-6","price":26.27,"currency_code":"USD","in_stock":true},{"title":"7' (82-7\/8\")","offer_id":44936778055888,"sku":"WOOD665-7","price":30.64,"currency_code":"USD","in_stock":true},{"title":"8' (94-3\/4\")","offer_id":44936778088656,"sku":"WOOD665-8","price":35.02,"currency_code":"USD","in_stock":true},{"title":"9' (106-1\/2\")","offer_id":44936778121424,"sku":"WOOD665-9","price":39.4,"currency_code":"USD","in_stock":true},{"title":"10' (118-1\/4\")","offer_id":44936778154192,"sku":"WOOD665-10","price":43.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/0411\/6944\/files\/thermo-aspen-1x4-tg-sts4-sauna-wood-prosaunas_7_0_f7c20303-9b05-404e-b6ef-8875d9acca0b.jpg?v=1771746290","url":"https:\/\/www.shophealthybodyhq.com\/products\/prosaunas-thermo-aspen-wall-material-15-x-90-mm-tongue-groove-sts4","provider":"Healthy Body HQ","version":"1.0","type":"link"}