{"product_id":"prosaunas-alder-1x4-t-g-sts4-wood662-1","title":"ProSaunas ALDER 1X4 (15mm x 90mm) T\u0026G STS4 | Sauna Wood, Tongue \u0026 Groove, STS4 Profile, Nickel-Gap, Wall Material","description":"\u003cstyle\u003e\n    :root {\n        --navy: #09195b;\n        --white: #ffffff;\n        --grey: rgba(97, 97, 97, 1);\n        --light-grey: #f5f5f5;\n        --border: #e0e0e0;\n        --accent: #c8a96e;\n    }\n\n    body {\n        font-family: 'DM Sans', sans-serif;\n    }\n\n    .prosaunas-logo {\n        \/* \/* font-family: 'Playfair Display', serif; *\/\n        *\/ color: var(--white);\n        font-size: 1.5rem;\n        font-weight: 700;\n        letter-spacing: 0.04em;\n        text-decoration: none;\n    }\n\n    .prosaunas-logo span {\n        color: var(--accent);\n    }\n\n    \/* nav a {\n    color: rgba(255, 255, 255, 0.75);\n    text-decoration: none;\n    font-size: 0.85rem;\n    font-weight: 500;\n    margin-left: 28px;\n    letter-spacing: 0.03em;\n    transition: color 0.2s;\n  }\n\n  nav a:hover {\n    color: var(--white);\n  } *\/\n\n    \/* ── BREADCRUMB ── *\/\n    .prosaunas-breadcrumb {\n        background: var(--light-grey);\n        padding: 12px 48px;\n        font-size: 0.8rem;\n        color: var(--grey);\n    }\n\n    .prosaunas-breadcrumb a {\n        color: var(--navy);\n        text-decoration: none;\n    }\n\n    .prosaunas-breadcrumb a:hover {\n        text-decoration: underline;\n    }\n\n    .prosaunas-breadcrumb span {\n        margin: 0 6px;\n    }\n\n    \/* ── HERO BANNER ── *\/\n    .prosaunas-hero-banner {\n        position: relative;\n        width: 100%;\n        height: 300px;\n        overflow: hidden;\n        border-radius: 20px;\n    }\n\n    .prosaunas-hero-banner img {\n        width: 100%;\n        height: 100%;\n        object-fit: cover;\n        object-position: center;\n        display: block;\n    }\n\n    .prosaunas-hero-overlay {\n        position: absolute;\n        inset: 0;\n        background: linear-gradient(to right, rgba(9, 25, 91, 0.85) 42%, rgba(9, 25, 91, 0.15) 100%);\n        display: flex;\n        align-items: center;\n        padding: 0 72px;\n    }\n\n    .prosaunas-hero-text {\n        max-width: 520px;\n    }\n\n    .prosaunas-badge {\n        display: inline-block;\n        background: var(--accent);\n        color: var(--navy);\n        font-size: 1.3rem;\n        font-weight: 700;\n        letter-spacing: 0.12em;\n        text-transform: uppercase;\n        padding: 5px 12px;\n        border-radius: 2px;\n        margin-bottom: 16px;\n    }\n\n    .prosaunas-hero-text h1 {\n        \/* font-family: 'Playfair Display', serif; *\/\n        font-size: 3.5rem;\n        \/* font-size: 2.6rem; *\/\n        font-weight: 700;\n        color: var(--white);\n        line-height: 1.15;\n        margin-bottom: 10px;\n    }\n\n    .prosaunas-hero-text .prosaunas-subtitle {\n        color: rgba(255, 255, 255, 0.75);\n        font-size: 1.5rem;\n        margin-bottom: 6px;\n    }\n\n    .prosaunas-hero-text .prosaunas-sku {\n        color: rgba(255, 255, 255, 0.5);\n        font-size: 1.5rem;\n    }\n\n    \/* ── MAIN CONTENT ── *\/\n    .prosaunas-content-wrap {\n        max-width: 1100px;\n        margin: 0 auto;\n        padding: 60px 0px;\n    }\n\n    \/* ── COMPONENT BANNER ── *\/\n    .prosaunas-component-banner {\n        background: #eef1f9;\n        border-left: 4px solid var(--navy);\n        padding: 16px 20px;\n        border-radius: 20px;\n        margin-bottom: 56px;\n    }\n\n    .prosaunas-component-banner p {\n        font-size: 1.5rem;\n        color: var(--navy);\n        font-weight: 500;\n        line-height: 1.6;\n    }\n\n    .prosaunas-component-banner strong {\n        font-weight: 700;\n    }\n\n    \/* ── INTRO: image left, text right ── *\/\n    .prosaunas-intro-block {\n        display: grid;\n        grid-template-columns: 1fr 1fr;\n        gap: 52px;\n        align-items: center;\n        margin-bottom: 20px;\n    }\n\n    .prosaunas-intro-block img {\n        width: 100%;\n        border-radius: 20px;\n        display: block;\n        aspect-ratio: 4\/3;\n        object-fit: cover;\n    }\n\n    .prosaunas-intro-text h2 {\n        \/* font-family: 'Playfair Display', serif; *\/\n        font-size: 3rem;\n        color: var(--navy);\n        margin-bottom: 16px;\n    }\n\n    .prosaunas-intro-text p {\n        font-size: 1.5rem;\n        color: #444;\n        line-height: 1.8;\n        margin-bottom: 14px;\n    }\n\n    \/* Spec chips *\/\n    .prosaunas-spec-chips {\n        display: flex;\n        flex-wrap: wrap;\n        gap: 8px;\n        margin-top: 20px;\n        margin-bottom: 50px;\n    }\n\n    .prosaunas-chip {\n        background: var(--light-grey);\n        border: 1px solid var(--border);\n        border-radius: 20px;\n        padding: 6px 14px;\n        font-size: 1.5rem;\n        color: #333;\n    }\n\n    .prosaunas-chip strong {\n        color: var(--navy);\n        font-weight: 600;\n    }\n\n    \/* ── SECTION TITLE ── *\/\n    .prosaunas-section-title {\n        \/* font-family: 'Playfair Display', serif; *\/\n        font-size: 3.5rem;\n        color: var(--navy);\n        margin-bottom: 28px;\n        padding-bottom: 10px;\n        border-bottom: 2px solid var(--border);\n    }\n\n    \/* ── FEATURES: table + side images ── *\/\n    .prosaunas-features-block {\n        display: grid;\n        grid-template-columns: 1fr 340px;\n        gap: 48px;\n        align-items: start;\n        margin-bottom: 72px;\n    }\n\n    .prosaunas-features-table {\n        width: 100%;\n        border-collapse: collapse;\n        font-size: 0.88rem;\n    }\n\n    .prosaunas-features-table thead tr {\n        background: var(--navy);\n        color: var(--white);\n    }\n\n    .prosaunas-features-table thead th {\n        padding: 13px 18px;\n        text-align: left;\n        font-weight: 600;\n        letter-spacing: 0.06em;\n        font-size: 1.5rem;\n        text-transform: uppercase;\n    }\n\n    .prosaunas-features-table thead th:first-child {\n        width: 36%;\n    }\n\n    .prosaunas-features-table tbody tr {\n        border-bottom: 1px solid var(--border);\n        font-size: 1.5rem;\n    }\n\n    .prosaunas-features-table tbody tr:nth-child(even) {\n        background: var(--light-grey);\n    }\n\n    .prosaunas-features-table tbody td {\n        padding: 13px 18px;\n        vertical-align: top;\n        line-height: 1.6;\n    }\n\n    .prosaunas-features-table tbody td:first-child {\n        font-weight: 600;\n        color: var(--navy);\n    }\n\n    .prosaunas-benefit-icon {\n        color: var(--accent);\n        margin-right: 4px;\n    }\n\n    .prosaunas-features-side {\n        display: flex;\n        flex-direction: column;\n        gap: 14px;\n        position: sticky;\n        top: 24px;\n    }\n\n    .prosaunas-features-side img {\n        width: 100%;\n        border-radius: 4px;\n        display: block;\n        object-fit: cover;\n    }\n\n    .prosaunas-features-side img:first-child {\n        aspect-ratio: 3\/2;\n    }\n\n    .prosaunas-features-side img:last-child {\n        aspect-ratio: 4\/3;\n    }\n\n    \/* ── WHY HEMLOCK ── *\/\n    .prosaunas-why-section {\n        background: var(--navy);\n        padding: 60px 48px;\n        margin-bottom: 72px;\n        border-radius: 20px;\n    }\n\n    .prosaunas-why-section h2 {\n        \/* font-family: 'Playfair Display', serif; *\/\n        color: var(--white);\n        font-size: 3rem;\n        margin-bottom: 8px;\n        text-align: center;\n    }\n\n    .prosaunas-why-section .prosaunas-sub {\n        color: rgba(255, 255, 255, 0.6);\n        font-size: 1.5rem;\n        text-align: center;\n        margin-bottom: 40px;\n    }\n\n    .prosaunas-why-cards {\n        display: grid;\n        grid-template-columns: repeat(3, 1fr);\n        gap: 22px;\n    }\n\n    .prosaunas-why-card {\n        background: rgba(255, 255, 255, 0.07);\n        border: 1px solid rgba(255, 255, 255, 0.13);\n        border-radius: 20px;\n        padding: 28px 22px;\n    }\n\n    .prosaunas-why-card .prosaunas-icon {\n        font-size: 3rem;\n        margin-bottom: 12px;\n    }\n\n    .prosaunas-why-card h3 {\n        \/* font-family: 'Playfair Display', serif; *\/\n        color: var(--white);\n        font-size: 2.5rem;\n        margin-bottom: 10px;\n    }\n\n    .prosaunas-why-card p {\n        color: rgba(255, 255, 255, 0.68);\n        font-size: 1.5rem;\n        line-height: 1.65;\n    }\n\n    \/* ── SPECS + IMAGE ── *\/\n    .prosaunas-specs-block {\n        display: grid;\n        grid-template-columns: 1fr 1fr;\n        gap: 48px;\n        align-items: start;\n        margin-bottom: 72px;\n    }\n\n    .prosaunas-specs-grid {\n        display: grid;\n        grid-template-columns: 1fr 1fr;\n        gap: 1px;\n        background: var(--border);\n        border: 1px solid var(--border);\n        border-radius: 4px;\n        overflow: hidden;\n    }\n\n    .prosaunas-spec-row {\n        background: var(--white);\n        padding: 13px 16px;\n        display: flex;\n        flex-direction: column;\n        gap: 3px;\n    }\n\n    .prosaunas-spec-row:nth-child(even) {\n        background: var(--light-grey);\n    }\n\n    .prosaunas-spec-label {\n        font-size: 1.5rem;\n        font-weight: 700;\n        text-transform: uppercase;\n        letter-spacing: 0.08em;\n        color: var(--grey);\n    }\n\n    .prosaunas-spec-value {\n        font-size: 1.5rem;\n        font-weight: 600;\n        color: var(--navy);\n    }\n\n    .prosaunas-nominal-note {\n        margin-top: 20px;\n        padding: 14px 18px;\n        background: #fffbf2;\n        border: 1px solid #e8d9b0;\n        border-radius: 10px;\n        font-size: 1.5rem;\n        color: #6b5523;\n        line-height: 1.6;\n    }\n\n    .prosaunas-nominal-note strong {\n        font-weight: 700;\n    }\n\n    .prosaunas-specs-side img {\n        width: 100%;\n        border-radius: 4px;\n        display: block;\n        aspect-ratio: 3\/4;\n        object-fit: cover;\n    }\n\n    .prosaunas-specs-side figcaption {\n        font-size: 0.78rem;\n        color: var(--grey);\n        margin-top: 8px;\n        text-align: center;\n    }\n\n    \/* ── SHIPPING ── *\/\n    .prosaunas-shipping-block {\n        background: var(--light-grey);\n        border-radius: 20px;\n        padding: 36px 40px;\n        margin-bottom: 72px;\n        display: grid;\n        grid-template-columns: 1fr 1fr;\n        gap: 40px;\n        align-items: start;\n    }\n\n    .prosaunas-shipping-block h2 {\n        \/* font-family: 'Playfair Display', serif; *\/\n        color: var(--navy);\n        font-size: 3rem;\n        margin-bottom: 14px;\n    }\n\n    .prosaunas-shipping-block p {\n        font-size: 1.5rem;\n        color: #444;\n        line-height: 1.75;\n        margin-bottom: 14px;\n    }\n\n    .prosaunas-shipping-block ul {\n        padding-left: 18px;\n    }\n\n    .prosaunas-shipping-block li {\n        font-size: 1.5rem;\n        color: var(--grey);\n        line-height: 2.1;\n    }\n\n    .prosaunas-shipping-contact {\n        background: var(--navy);\n        border-radius: 20px;\n        padding: 28px 24px;\n    }\n\n    .prosaunas-shipping-contact h3 {\n        \/* font-family: 'Playfair Display', serif; *\/\n        font-size: 2.5rem;\n        margin-bottom: 14px;\n        color: var(--white);\n    }\n\n    .prosaunas-shipping-contact p {\n        font-size: 1.5rem;\n        color: rgba(255, 255, 255, 0.75);\n        line-height: 1.7;\n        margin-bottom: 10px;\n    }\n\n    .prosaunas-shipping-contact a {\n        color: #fff;\n        text-decoration: none;\n        font-weight: 600;\n    }\n\n    \/* ── QUALITY ── *\/\n    .prosaunas-quality-section {\n        text-align: center;\n        margin-bottom: 60px;\n    }\n\n    .prosaunas-quality-section h2 {\n        \/* font-family: 'Playfair Display', serif; *\/\n        color: var(--navy);\n        font-size: 3rem;\n        margin-bottom: 14px;\n    }\n\n    .prosaunas-quality-section p {\n        color: var(--grey);\n        font-size: 1.5rem;\n        max-width: 680px;\n        margin: 0 auto 36px;\n        line-height: 1.75;\n    }\n\n    .prosaunas-quality-stats {\n        display: flex;\n        justify-content: center;\n        gap: 64px;\n    }\n\n    .prosaunas-stat-number {\n        \/* font-family: 'Playfair Display', serif; *\/\n        font-size: 3rem;\n        font-weight: 700;\n        color: var(--navy);\n        line-height: 1;\n    }\n\n    .prosaunas-stat-label {\n        font-size: 1.5rem;\n        color: var(--grey);\n        text-transform: uppercase;\n        letter-spacing: 0.06em;\n        margin-top: 5px;\n    }\n\n    \/* ── WHAT'S INCLUDED ── *\/\n    .prosaunas-included-block {\n        display: grid;\n        grid-template-columns: 340px 1fr;\n        gap: 48px;\n        align-items: center;\n        margin-bottom: 72px;\n    }\n\n    .prosaunas-included-image img {\n        width: 100%;\n        border-radius: 4px;\n        display: block;\n        aspect-ratio: 4\/3;\n        object-fit: cover;\n    }\n\n    .prosaunas-included-list {\n        list-style: none;\n        padding: 0;\n        margin: 0;\n        display: flex;\n        flex-direction: column;\n        gap: 12px;\n    }\n\n    .prosaunas-included-item {\n        display: flex;\n        align-items: center;\n        gap: 14px;\n        padding: 16px 20px;\n        background: var(--light-grey);\n        border: 1px solid var(--border);\n        border-left: 4px solid var(--navy);\n        border-radius: 20px;\n    }\n\n    .prosaunas-included-icon {\n        display: flex;\n        align-items: center;\n        justify-content: center;\n        width: 28px;\n        height: 28px;\n        min-width: 28px;\n        background: var(--navy);\n        color: var(--white);\n        font-size: 1.6rem;\n        font-weight: 700;\n        border-radius: 50%;\n    }\n\n    .prosaunas-included-text {\n        font-size: 1.4rem;\n        font-weight: 500;\n        color: #1a1a1a;\n    }\n\n    @media (max-width: 860px) {\n        .prosaunas-included-block {\n            grid-template-columns: 1fr;\n        }\n    }\n\n    \/* ── RESPONSIVE ── *\/\n    @media (max-width: 860px) {\n\n        .prosaunas-breadcrumb {\n            padding: 10px 20px;\n        }\n\n        .prosaunas-hero-banner {\n            height: 300px;\n        }\n\n        .prosaunas-hero-overlay {\n            padding: 0 24px;\n        }\n\n        .prosaunas-hero-text h1 {\n            font-size: 1.8rem;\n        }\n\n        .prosaunas-content-wrap {\n            padding: 32px 20px;\n        }\n\n        .prosaunas-intro-block,\n        .prosaunas-features-block,\n        .prosaunas-specs-block,\n        .prosaunas-shipping-block {\n            grid-template-columns: 1fr;\n        }\n\n        .prosaunas-features-side {\n            flex-direction: row;\n            position: static;\n        }\n\n        .prosaunas-features-side img {\n            flex: 1;\n            aspect-ratio: 1 !important;\n            width: 50px;\n        }\n\n        .prosaunas-why-cards {\n            grid-template-columns: 1fr;\n        }\n\n        .prosaunas-quality-stats {\n            gap: 28px;\n        }\n\n        .prosaunas-specs-grid {\n            grid-template-columns: 1fr;\n        }\n    }\n\u003c\/style\u003e\n\u003c!-- HERO — full-width image with title overlaid --\u003e\n\u003cdiv class=\"prosaunas-hero-banner\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/1224\/4854\/files\/PROSAUNAS-Thermo-Aspen-Interior-2_1c1c3a69-a731-40e6-b4ea-0235b783608b.jpg?v=1775552826\" alt=\"PROSAUNAS Wood\"\u003e\n\u003cdiv class=\"prosaunas-hero-overlay\"\u003e\n\u003cdiv class=\"prosaunas-hero-text\"\u003e\n\u003cdiv class=\"prosaunas-badge\"\u003eSauna Wood · Bench \u0026amp; Floor Material\u003c\/div\u003e\n\u003ch1\u003eProSaunas ALDER 1X4 (15mm x 90mm) T\u0026amp;G STS4\u003c\/h1\u003e\n\u003cp class=\"prosaunas-subtitle\"\u003eSauna Wood, Tongue \u0026amp; Groove, STS4 Profile, Nickel-Gap, Wall Material\u003c\/p\u003e\n\u003cp class=\"prosaunas-sku\"\u003eSKU: WOOD662-1  ·  Model: ALDER 1X4 T\u0026amp;G STS4\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-content-wrap\"\u003e\n\u003c!-- WHAT IS THIS PRODUCT --\u003e\n\u003cdiv class=\"prosaunas-component-banner\"\u003e\n\u003cp\u003e🪵 \u003cstrong\u003eWhat is this material used for?\u003c\/strong\u003e This is sauna interior cladding timber, made for lining the walls and ceilings inside your sauna. It creates the exposed finish, helps maintain and spread heat evenly, and defines the overall style and atmosphere of your sauna environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- INTRO: sauna interior photo + description text side by side --\u003e\n\u003cdiv class=\"prosaunas-intro-block\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/1224\/4854\/files\/WOOD662-Alder-1x4-_15mmx90mm_T_G-STS4-NICKEL-GAP-1.jpg?v=1775208172\" alt=\"Premium sauna interior showing bench construction with natural wood\"\u003e\n\u003cdiv class=\"prosaunas-intro-text\"\u003e\n\u003ch2\u003eSmooth Panels. Subtle Detailing.\u003c\/h2\u003e\n\u003cp\u003ePROSAUNAS Alder 1×4 STS4 T\u0026amp;G is a premium sauna cladding wood designed to deliver a clean, refined finish across walls and ceilings. With its tongue and groove construction and subtle nickel-gap profile, it creates a consistent look while allowing for natural expansion.\u003c\/p\u003e\n\u003cp\u003eAlder is appreciated for its warm color, fine grain, and low resin content, making it comfortable to the touch even in high sauna temperatures. Its stable structure supports long-term performance in environments with constant heat and humidity.\u003c\/p\u003e\n\u003cp\u003eEach board features the STS4 profile, providing tight alignment with a slight shadow gap for visual depth. Its precise dimensions and smooth machining ensure easy installation and seamless integration with other sauna materials.\u003c\/p\u003e\n\u003cp\u003ePROSAUNAS selects high-quality Alder timber to maintain consistent tone, smooth texture, and reliable durability. The result is a practical and elegant wall material suited for both residential and commercial sauna interiors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-chips\"\u003e\n\u003cdiv class=\"prosaunas-chip\"\u003e\n\u003cstrong\u003eSpecies:\u003c\/strong\u003e Alder\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-chip\"\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e STS4 Tongue \u0026amp; Groove (Nickel-Gap)\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-chip\"\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Wall \u0026amp; Ceiling Cladding\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-chip\"\u003e\n\u003cstrong\u003eGrain:\u003c\/strong\u003e Fine, Even Texture\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-chip\"\u003e\n\u003cstrong\u003eSurface:\u003c\/strong\u003e Smooth Planed Finish\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-chip\"\u003e\n\u003cstrong\u003eNominal Size:\u003c\/strong\u003e 1X4 (15mm x 90mm)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- FEATURES \u0026 BENEFITS — table with wood detail images alongside --\u003e\n\u003ch2 class=\"prosaunas-section-title\"\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cdiv class=\"prosaunas-features-block\"\u003e\n\u003ctable class=\"prosaunas-features-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eBenefit - Why It Matters to Your Build\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlder Sauna Wood\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"prosaunas-benefit-icon\"\u003e✦\u003c\/span\u003eNaturally warm hardwood ideal for sauna interiors - provides a smooth feel, low resin content, and comfort in high temperatures.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTS4 Nickel-Gap Profile\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"prosaunas-benefit-icon\"\u003e✦\u003c\/span\u003eSubtle spacing between boards - creates a clean shadow line while allowing for natural expansion.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTongue \u0026amp; Groove System\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"prosaunas-benefit-icon\"\u003e✦\u003c\/span\u003eInterlocking board design - ensures secure installation and consistent panel alignment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall \u0026amp; Ceiling Cladding\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"prosaunas-benefit-icon\"\u003e✦\u003c\/span\u003eDesigned for full surface coverage - delivers a seamless and uniform interior finish.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePerforms in Sauna Environments\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"prosaunas-benefit-icon\"\u003e✦\u003c\/span\u003eWithstands heat and humidity changes - maintains stability over time.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmooth Planed Finish\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"prosaunas-benefit-icon\"\u003e✦\u003c\/span\u003eEvenly surfaced boards for a refined look - enhances both comfort and appearance.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConsistent Tone \u0026amp; Grain\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"prosaunas-benefit-icon\"\u003e✦\u003c\/span\u003eFine, uniform texture - creates a balanced and cohesive visual style.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDurable \u0026amp; Stable Wood\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"prosaunas-benefit-icon\"\u003e✦\u003c\/span\u003eLess prone to warping or shifting - supports long-term performance.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEasy Installation\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"prosaunas-benefit-icon\"\u003e✦\u003c\/span\u003ePrecision-cut boards fit together smoothly - simplifies setup and reduces effort.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIdeal for Sauna Interiors\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"prosaunas-benefit-icon\"\u003e✦\u003c\/span\u003eCombines function and aesthetics - perfect for both modern and traditional sauna designs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- Wood detail images beside the table --\u003e\n\u003cdiv class=\"prosaunas-features-side\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/1224\/4854\/files\/WOOD662-Alder-1x4-_15mmx90mm_T_G-STS4-NICKEL-GAP-3.jpg?v=1775208172\" alt=\"Close-up Wood\"\u003e \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/1224\/4854\/files\/WOOD662-Alder-1x4-_15mmx90mm_T_G-STS4-NICKEL-GAP-5.jpg?v=1775208172\" alt=\"Close-up Wood\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- WHY CEDAR cards --\u003e\n\u003cdiv class=\"prosaunas-why-section\"\u003e\n\u003ch2\u003eWhy Select Alder STS4 Cladding for Your Sauna Interior?\u003c\/h2\u003e\n\u003cp class=\"prosaunas-sub\"\u003eThree reasons sauna builders prefer Alder for clean wall and ceiling finishes.\u003c\/p\u003e\n\u003cdiv class=\"prosaunas-why-cards\"\u003e\n\u003cdiv class=\"prosaunas-why-card\"\u003e\n\u003cdiv class=\"prosaunas-icon\"\u003e🌡️\u003c\/div\u003e\n\u003ch3\u003eStable in High Heat\u003c\/h3\u003e\n\u003cp\u003eAlder performs reliably in elevated temperatures. Its stable structure helps reduce warping and movement - keeping panels straight and evenly aligned over time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-why-card\"\u003e\n\u003cdiv class=\"prosaunas-icon\"\u003e💧\u003c\/div\u003e\n\u003ch3\u003eResists Moisture Changes\u003c\/h3\u003e\n\u003cp\u003eWith low resin content and balanced moisture response, Alder handles humidity well. This supports long-term durability and consistent performance in sauna conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-why-card\"\u003e\n\u003cdiv class=\"prosaunas-icon\"\u003e🎨\u003c\/div\u003e\n\u003ch3\u003eClean, Timeless Look\u003c\/h3\u003e\n\u003cp\u003eThe STS4 nickel-gap profile adds subtle shadow lines and depth. Paired with Alder’s warm tone and smooth surface, it creates a refined and cohesive sauna interior.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- SPECIFICATIONS with profile image alongside --\u003e\n\u003ch2 class=\"prosaunas-section-title\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"prosaunas-specs-block\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"prosaunas-specs-grid\"\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eSpecies\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003eAlder\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eNominal Size\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003e1X4\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eProfile\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003eSTS4 Tongue \u0026amp; Groove (Nickel-Gap Profile)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eGrain Type\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003eFine, Even Grain\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eFinish\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003eNatural\/Unoiled\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eApplication\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003eWall \u0026amp; Ceiling Cladding\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eWall Coverage\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003e3.1\" (80mm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eProduct Width\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003e3.54\" (90mm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eProduct Thickness\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003e.59\" (15mm)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eLength Availability\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003eUp to 10'\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eColor\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003eLight Reddish-Brown Tone\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-spec-row\"\u003e\n\u003cspan class=\"prosaunas-spec-label\"\u003eSKU\u003c\/span\u003e \u003cspan class=\"prosaunas-spec-value\"\u003eWOOD662-1\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-nominal-note\"\u003e\n\u003cstrong\u003e⚠ Nominal vs. Actual Lumber Sizes:\u003c\/strong\u003e In North America, wood sizes are listed in \u003cem\u003enominal\u003c\/em\u003e measurements, which is the lumber’s size when it is cut from moist logs. After shrinkage from drying and surfacing, the actual size of lumber will be less than its nominal size. Please see the diagram for actual dimensions.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cfigure class=\"prosaunas-specs-side\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/1224\/4854\/files\/WOOD662-Alder-1x4-_15mmx90mm_T_G-STS4-NICKEL-GAP-4.jpg?v=1775208172\" alt=\"Sauna wall panel profile showing tongue and groove V-joint edges\"\u003e\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003c!-- WHAT'S INCLUDED --\u003e\n\u003ch2 class=\"prosaunas-section-title\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cdiv class=\"prosaunas-included-block\"\u003e\n\u003cfigure class=\"prosaunas-included-image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/1224\/4854\/files\/WOOD662-Alder-1x4-_15mmx90mm_T_G-STS4-NICKEL-GAP-6.jpg?v=1775208172\" alt=\"Sauna wall panel profile view showing tongue and groove V-joint edges\"\u003e\u003c\/figure\u003e\n\u003cul class=\"prosaunas-included-list\"\u003e\n\u003cli class=\"prosaunas-included-item\"\u003e\n\u003cspan class=\"prosaunas-included-icon\"\u003e✓\u003c\/span\u003e \u003cspan class=\"prosaunas-included-text\"\u003eAlder 1×4 Cladding Boards\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"prosaunas-included-item\"\u003e\n\u003cspan class=\"prosaunas-included-icon\"\u003e✓\u003c\/span\u003e \u003cspan class=\"prosaunas-included-text\"\u003eSTS4 Tongue \u0026amp; Groove Profile\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- SHIPPING --\u003e\n\u003cdiv class=\"prosaunas-shipping-block\"\u003e\n\u003cdiv\u003e\n\u003ch2\u003eShipping Information\u003c\/h2\u003e\n\u003cp\u003eWood products ship via standard freight. Shipping cost is calculated based on order quantity, board lengths, and your delivery location — it is not included in the listed price and will be quoted separately.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard freight shipping on all wood orders\u003c\/li\u003e\n\u003cli\u003eShipping cost varies by order size and destination\u003c\/li\u003e\n\u003cli\u003eContact PROSAUNAS for a freight quote before ordering\u003c\/li\u003e\n\u003cli\u003eBulk orders may qualify for volume pricing\u003c\/li\u003e\n\u003cli\u003eAll orders inspected before shipment for quality assurance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-shipping-contact\"\u003e\n\u003ch3\u003e📞 Have Questions?\u003c\/h3\u003e\n\u003cp\u003eOur team has 55+ years of experience helping builders select the right wood. We're happy to help you calculate quantities, confirm sizing, or get a shipping quote.\u003c\/p\u003e\n\u003cp\u003eCall: \u003ca href=\"tel:8009572862\" style=\"color: #fff;\"\u003e(800) 957-2862\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eEmail: \u003ca href=\"mailto:info@peakprimalwellness.com\" style=\"color: #fff;\"\u003einfo@peakprimalwellness.com\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin-top: 10px; font-size: 0.78rem; color: rgba(255,255,255,0.45);\"\u003eMon–Fri 8:00am–5:00pm CT\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- QUALITY PROMISE --\u003e\n\u003cdiv class=\"prosaunas-quality-section\"\u003e\n\u003ch2\u003eThe PROSAUNAS Quality Promise\u003c\/h2\u003e\n\u003cp\u003ePROSAUNAS carefully selects only the finest wood from Northern Europe and Canada, ensuring quality and consistency that meets our stringent standards. Every board is inspected before it ships — because a great sauna starts with great materials.\u003c\/p\u003e\n\u003cdiv class=\"prosaunas-quality-stats\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"prosaunas-stat-number\"\u003e55+\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-stat-label\"\u003eYears of Experience\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"prosaunas-stat-number\"\u003e100%\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-stat-label\"\u003eQuality Inspected\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"prosaunas-stat-number\"\u003eNorth America\u003c\/div\u003e\n\u003cdiv class=\"prosaunas-stat-label\"\u003eServing Builders Across\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- \/content-wrap --\u003e","brand":"ProSaunas","offers":[{"title":"1' (11-1\/2\")","offer_id":43253225521270,"sku":"WOOD662-1","price":4.0,"currency_code":"USD","in_stock":true},{"title":"2' (23-1\/2\")","offer_id":43253225554038,"sku":"WOOD662-2","price":8.02,"currency_code":"USD","in_stock":false},{"title":"3' (35-1\/2\")","offer_id":43253225586806,"sku":"WOOD662-3","price":12.02,"currency_code":"USD","in_stock":false},{"title":"4' (47-1\/2\")","offer_id":43253225619574,"sku":"WOOD662-4","price":16.03,"currency_code":"USD","in_stock":false},{"title":"5' (59-1\/8\")","offer_id":43253225685110,"sku":"WOOD662-5","price":20.03,"currency_code":"USD","in_stock":false},{"title":"6' (71-1\/4\")","offer_id":43253225750646,"sku":"WOOD662-6","price":24.05,"currency_code":"USD","in_stock":false},{"title":"7' (82-7\/8\")","offer_id":43253225783414,"sku":"WOOD662-7","price":28.05,"currency_code":"USD","in_stock":false},{"title":"8' (94-3\/4\")","offer_id":43253225816182,"sku":"WOOD662-8","price":32.05,"currency_code":"USD","in_stock":false},{"title":"10' (118-1\/4\")","offer_id":43253225848950,"sku":"WOOD662-10","price":40.07,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/1224\/4854\/files\/WOOD662-Alder-1x4-_15mmx90mm_T_G-STS4-NICKEL-GAP-1.jpg?v=1778622307","url":"https:\/\/peakprimalwellness.com\/products\/prosaunas-alder-1x4-t-g-sts4-wood662-1","provider":"Peak Primal Wellness","version":"1.0","type":"link"}