Disclaimer: Actual product colors may vary slightly from the images shown due to different monitor settings and lighting conditions during photo shoots.
25mm x 125mm ThermoWood-D Pine Tongue & Groove Shiplap Embossed Cladding is a premium, low-maintenance timber cladding designed for external applications where durability, stability, and appearance are essential. Manufactured from Finnish-grown pine using the ThermoWood® heat treatment process, this cladding offers excellent performance without the use of chemical preservatives.
ThermoWood-D is produced by heat treating timber to temperatures in excess of 200°C, permanently altering its cellular structure. This process significantly improves resistance to decay, moisture movement, and warping, making it an ideal choice for external walls, façades, garden buildings, and exposed elevations.
The tongue and groove shiplap profile provides an overlapping joint that helps shed water effectively while allowing the boards to interlock securely. The embossed finish adds subtle texture and visual interest, creating a clean, contemporary appearance. Colour varies depending on the treatment temperature, with higher temperatures producing a darker tone. If left untreated, the cladding will weather naturally to a silver-grey finish, or it can be coated to retain its original colour.
Uncoated ThermoWood-D pine cladding can achieve a 30-year service life when installed correctly. When a surface coating is applied and maintained in line with manufacturer guidance, a 60-year service life can be achieved. ThermoWood-D has a durability class 2 (durable) rating in accordance with EN 113.
Produced from sustainably managed Finnish forests and certified under recognised forestry schemes, ThermoWood® is an environmentally responsible choice for modern architectural cladding projects.
Nominal size: 25mm x 125mm Finished size: approximately 20mm x 117mm Material: ThermoWood-D pine (A/B grade European redwood) Profile: Tongue & groove shiplap, embossed Finish: Smooth Use: External wall cladding Durability: Class 2 (EN 113)
<div class="dynamic-checkout__content" id="dynamic-checkout-cart" data-shopify="dynamic-checkout-cart"> <shopify-accelerated-checkout-cart wallet-configs="[{"supports_subs":true,"supports_def_opts":false,"name":"shop_pay","wallet_params":{"shopId":99414671697,"merchantName":"Nottage Timber Merchants","personalized":true}},{"supports_subs":false,"supports_def_opts":false,"name":"paypal","wallet_params":{"shopId":99414671697,"countryCode":"GB","merchantName":"Nottage Timber Merchants","phoneRequired":true,"companyRequired":false,"shippingType":"shipping","shopifyPaymentsEnabled":true,"hasManagedSellingPlanState":null,"requiresBillingAgreement":false,"merchantId":"4SEEJ4TH9WQAJ","sdkUrl":"https://www.paypal.com/sdk/js?components=buttons\u0026commit=false\u0026currency=GBP\u0026locale=en_US\u0026client-id=AexZEtAxk09Ncgj6FSWFFyGKbxxAZ_LTyJ2DPdJWl1YUlecinmc5AfIaRF2qYjWlusWahlzz6SVkY5Ci\u0026merchant-id=4SEEJ4TH9WQAJ\u0026intent=authorize"}}]" access-token="e92a78a56653606fd99a7ce6efe5e4b3" buyer-country="GB" buyer-locale="en" buyer-currency="GBP" shop-id="99414671697" cart-id="a4db82e808fbe554aedf7b2e38d5515e" enabled-flags="["d6d12da0","32a68cd0","a1c7ccbe","ce346acf","c0874428"]" > <div class="wallet-button-wrapper"> <ul class='wallet-cart-grid wallet-cart-grid--skeleton' role="list" data-shopify-buttoncontainer="true"> <li data-testid='grid-cell' class='wallet-cart-button-container'><div class='wallet-cart-button wallet-cart-button__skeleton' role='button' disabled aria-hidden='true'> </div></li><li data-testid='grid-cell' class='wallet-cart-button-container'><div class='wallet-cart-button wallet-cart-button__skeleton' role='button' disabled aria-hidden='true'> </div></li> </ul> </div> </shopify-accelerated-checkout-cart> <small id="shopify-buyer-consent" class="hidden" aria-hidden="true" data-consent-type="subscription"> One or more of the items in your cart is a recurring or deferred purchase. By continuing, I agree to the <span id="shopify-subscription-policy-button">cancellation policy</span> and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. </small> </div>
