{"title":"Clay Building Boards","description":"\u003cp data-start=\"160\" data-end=\"503\"\u003eExplore our range of \u003cstrong data-start=\"181\" data-end=\"205\"\u003eclay building boards\u003c\/strong\u003e for breathable internal construction, including both \u003cstrong data-start=\"259\" data-end=\"295\"\u003eHeavyweight Clay Building Boards\u003c\/strong\u003e and \u003cstrong data-start=\"300\" data-end=\"336\"\u003eLightweight Clay and Hemp Boards\u003c\/strong\u003e. These natural boards offer a practical way to create solid, vapour-open wall, ceiling and drylining systems while retaining the moisture-regulating benefits of clay.\u003c\/p\u003e\n\u003cp data-start=\"505\" data-end=\"962\"\u003eClay building boards are ideal for homeowners, self-builders, contractors and specifiers looking for a faster alternative to fully wet-applied clay plaster systems. They are especially useful where a drylining solution is preferred, but a natural, breathable finish is still required. Suitable for internal walls, ceilings, studwork and renovation projects, they form an excellent base for clay plasters, clay decorative plasters and other natural finishes.\u003c\/p\u003e\n\u003cp data-start=\"964\" data-end=\"1577\"\u003eOur \u003cstrong data-start=\"968\" data-end=\"1004\"\u003eHeavyweight Clay Building Boards\u003c\/strong\u003e are designed where a denser, more solid board is preferred, helping to create robust internal wall and ceiling linings with all the character and performance of clay. Alongside these, our \u003cstrong data-start=\"1193\" data-end=\"1229\"\u003eLightweight Clay and Hemp Boards\u003c\/strong\u003e offer an easier-to-handle option that is especially attractive for homeowners and installers who want the benefits of clay in a board that is simpler to lift, cut and fix on site. The lightweight hemp-clay boards are made from clay, hemp shives and fibres, sand, and jute mesh reinforcement, and are suitable for walls, ceilings and sloped roofs.\u003c\/p\u003e\n\u003cp data-start=\"1579\" data-end=\"2041\"\u003eThese boards can be used on timber or metal substructures and, in the case of the lightweight hemp-clay boards, also on suitable full-surface backgrounds. The lightweight range is available in \u003cstrong data-start=\"1772\" data-end=\"1789\"\u003e14mm and 22mm\u003c\/strong\u003e, with the \u003cstrong data-start=\"1800\" data-end=\"1848\"\u003e14mm boards suited to 400mm-centred studwork\u003c\/strong\u003e and the \u003cstrong data-start=\"1857\" data-end=\"1914\"\u003e22mm boards suited to 400mm or 600mm-centred studwork\u003c\/strong\u003e, making it easier to choose the right board for the build-up and fixing layout required.\u003c\/p\u003e\n\u003cp data-start=\"2043\" data-end=\"2424\"\u003eAs part of a full clay system, clay building boards are typically finished with \u003cstrong data-start=\"2123\" data-end=\"2164\"\u003eClay Adhesive \u0026amp; Reinforcement Plaster\u003c\/strong\u003e, reinforcing mesh, and then a final finish such as \u003cstrong data-start=\"2216\" data-end=\"2237\"\u003efine clay plaster\u003c\/strong\u003e or \u003cstrong data-start=\"2241\" data-end=\"2268\"\u003eclay decorative plaster\u003c\/strong\u003e. This creates a complete breathable internal wall system that supports good indoor humidity control, natural finishes and healthier interior environments.\u003c\/p\u003e\n\u003cp data-start=\"2426\" data-end=\"2687\"\u003eFrom \u003cstrong data-start=\"2431\" data-end=\"2452\"\u003eheavy clay boards\u003c\/strong\u003e for solid internal linings to \u003cstrong data-start=\"2483\" data-end=\"2515\"\u003elightweight hemp-clay boards\u003c\/strong\u003e for easier handling and installation, this category brings together practical natural drylining solutions for breathable homes, heritage projects and low-energy interiors.\u003c\/p\u003e","products":[{"product_id":"heavy-clay-building-board","title":"Heavy Clay Building Board","description":"\u003cp data-end=\"704\" data-start=\"219\"\u003e\u003cstrong data-end=\"248\" data-start=\"219\"\u003eHeavy Clay Building Board\u003c\/strong\u003e is a high-density \u003cstrong data-end=\"299\" data-start=\"267\"\u003einternal clay building board\u003c\/strong\u003e for drylining, wall linings, partitions and ceiling applications, combining the speed of dry construction with the natural performance of clay. Manufactured by Conluto, it is designed for breathable internal construction where moisture regulation, solid feel and natural material performance are important. We offer this board in both \u003cstrong data-end=\"664\" data-start=\"635\"\u003e16mm and 22mm thicknesses\u003c\/strong\u003e to suit different project requirements.\u003c\/p\u003e\n\u003cp data-end=\"1192\" data-start=\"706\"\u003eMade from natural clay with reinforcing fibres, \u003cstrong data-end=\"783\" data-start=\"754\"\u003eHeavy Clay Building Board\u003c\/strong\u003e is ideal for use in \u003cstrong data-end=\"906\" data-start=\"804\"\u003etimber frame construction, stud partitions, wall linings, sloping ceilings and renovation projects\u003c\/strong\u003e. It offers the benefits of a breathable clay system while allowing for faster and cleaner installation than a fully wet-applied clay plaster build-up alone. This makes it an excellent option for natural building, low-energy homes, heritage renovation and healthy interior environments.\u003c\/p\u003e\n\u003cp data-end=\"1580\" data-start=\"1194\"\u003eThe boards are suitable for internal use on \u003cstrong data-end=\"1266\" data-start=\"1238\"\u003etimber or metal studwork\u003c\/strong\u003e, as well as other solid backgrounds where appropriate. The \u003cstrong data-end=\"1389\" data-start=\"1326\"\u003e16mm board can only be applied to studwork at 400mm centres\u003c\/strong\u003e, while the \u003cstrong data-end=\"1472\" data-start=\"1401\"\u003e22mm board can be applied to either 400mm or 600mm centred studwork\u003c\/strong\u003e. This is a key specification point and should be considered when selecting the correct board for a project.\u003c\/p\u003e\n\u003cp data-end=\"1863\" data-start=\"1582\"\u003eHeavy Clay Building Board also adds useful \u003cstrong data-end=\"1641\" data-start=\"1625\"\u003esurface mass\u003c\/strong\u003e, helping to improve the solid feel of lightweight internal constructions while contributing to indoor comfort. As part of a breathable clay system, it helps regulate humidity and supports a healthier internal environment.\u003c\/p\u003e\n\u003cp data-end=\"1863\" data-start=\"1582\"\u003eFor projects where fire performance matters, Heavy Clay Building Board has a \u003cstrong data-end=\"2399\" data-start=\"2351\"\u003ereaction-to-fire classification of A2-s1, d0\u003c\/strong\u003e, and the current Conluto technical documentation also includes tested wall build-ups achieving a range of fire-resistance and acoustic results depending on the full construction.\u003c\/p\u003e\n\u003cp data-end=\"2031\" data-start=\"1865\"\u003eOnce installed, the surface is typically finished with a clay skim or decorative clay finish, allowing the full system to remain vapour open and natural in character.\u003c\/p\u003e\n\u003ch3 data-end=\"2049\" data-start=\"2033\" data-section-id=\"1iz91iu\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-end=\"2616\" data-start=\"2051\"\u003e\n\u003cli data-end=\"2107\" data-start=\"2051\" data-section-id=\"6xg1ag\"\u003e\n\u003cstrong data-end=\"2082\" data-start=\"2053\"\u003eHeavy clay building board\u003c\/strong\u003e for internal drylining\u003c\/li\u003e\n\u003cli data-end=\"2140\" data-start=\"2108\" data-section-id=\"x6ppve\"\u003eAvailable in \u003cstrong data-end=\"2140\" data-start=\"2123\"\u003e16mm and 22mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2208\" data-start=\"2141\" data-section-id=\"50xk5u\"\u003eSuitable for \u003cstrong data-end=\"2208\" data-start=\"2156\"\u003einternal walls, partitions, linings and ceilings\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2281\" data-start=\"2209\" data-section-id=\"1198wl0\"\u003eIdeal for \u003cstrong data-end=\"2281\" data-start=\"2221\"\u003enatural building, renovation and breathable construction\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2352\" data-start=\"2282\" data-section-id=\"ipbi8w\"\u003eHelps support \u003cstrong data-end=\"2352\" data-start=\"2298\"\u003ehumidity regulation and healthy indoor air quality\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2424\" data-start=\"2353\" data-section-id=\"1c56k8w\"\u003eProvides a solid, dense feel compared to lightweight drylining boards\u003c\/li\u003e\n\u003cli data-end=\"2487\" data-start=\"2425\" data-section-id=\"1rkdj6l\"\u003e\n\u003cstrong data-end=\"2442\" data-start=\"2427\"\u003e16mm board:\u003c\/strong\u003e suitable for \u003cstrong data-end=\"2487\" data-start=\"2456\"\u003e400mm centred studwork only\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2554\" data-start=\"2488\" data-section-id=\"1gg5lk5\"\u003e\n\u003cstrong data-end=\"2505\" data-start=\"2490\"\u003e22mm board:\u003c\/strong\u003e suitable for \u003cstrong data-end=\"2554\" data-start=\"2519\"\u003e400mm or 600mm centred studwork\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2616\" data-start=\"2555\" data-section-id=\"b5icor\"\u003eDesigned to be finished with breathable clay-based finishes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/7297\/2461\/files\/Screenshot_2026-04-12_170739.png?v=1776010080\" alt=\"\" width=\"613\" height=\"236\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/huAwxCFMvhE?si=C_0-Y3YzVuzutrx0\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e","brand":"Roundtower Lime Ireland","offers":[{"title":"16mm x 1250mm x 625mm (Coverage per board = 0.781m2)","offer_id":45903765274797,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true},{"title":"22mm x 1250mm x 625mm (Coverage per board = 0.781m2)","offer_id":45903765307565,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/7297\/2461\/files\/Heavy_Clay_Building_Boards.jpg?v=1776009514"},{"product_id":"lightweight-hemp-clay-building-board","title":"Lightweight Hemp-Clay Building Board","description":"\u003cp data-start=\"162\" data-end=\"828\"\u003e\u003cstrong data-start=\"162\" data-end=\"202\"\u003eLightweight Hemp-Clay Building Board\u003c\/strong\u003e is a breathable \u003cstrong data-start=\"219\" data-end=\"247\"\u003einternal hemp-clay board\u003c\/strong\u003e for walls, ceilings and sloped roofs, combining the natural moisture-regulating benefits of clay with a lighter, easier-to-handle format for dry construction. Manufactured by Conluto to \u003cstrong data-start=\"434\" data-end=\"447\"\u003eDIN 18948\u003c\/strong\u003e, it is made from \u003cstrong data-start=\"465\" data-end=\"546\"\u003eclay, hemp shives and fibres, sand, and jute mesh reinforcement on both sides\u003c\/strong\u003e, making it a strong natural choice for healthy, vapour-open interiors. It is suitable for \u003cstrong data-start=\"637\" data-end=\"709\"\u003epaneling, wall linings, ceiling linings and dry construction systems\u003c\/strong\u003e in both renovation and new-build projects. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"830\" data-end=\"1412\"\u003eDesigned as a more manageable alternative to heavier clay boards, this \u003cstrong data-start=\"901\" data-end=\"936\"\u003elightweight clay building board\u003c\/strong\u003e is especially well suited to homeowners, self-builders and installers who want the performance of clay in a board that is easier to handle on site. We offer it in both \u003cstrong data-start=\"1105\" data-end=\"1134\"\u003e14mm and 22mm thicknesses\u003c\/strong\u003e. The \u003cstrong data-start=\"1140\" data-end=\"1204\"\u003e14mm board weighs approximately 12kg per board \/ 10kg per m²\u003c\/strong\u003e, while the \u003cstrong data-start=\"1216\" data-end=\"1280\"\u003e22mm board weighs approximately 19kg per board \/ 15kg per m²\u003c\/strong\u003e, helping make lifting, positioning and fixing more practical than denser heavyweight options.\u003c\/p\u003e\n\u003cp data-start=\"1414\" data-end=\"2184\"\u003eThis \u003cstrong data-start=\"1419\" data-end=\"1438\"\u003ehemp-clay board\u003c\/strong\u003e can be used on \u003cstrong data-start=\"1454\" data-end=\"1487\"\u003etimber or metal substructures\u003c\/strong\u003e, and also on suitable full-surface backgrounds such as existing plaster, concrete, brick and sand-lime brick when fixed correctly. It can be installed using \u003cstrong data-start=\"1645\" data-end=\"1689\"\u003escrews, staples or full-surface adhesive\u003c\/strong\u003e, depending on the background and build-up. For straightforward specification on standard stud layouts, the \u003cstrong data-start=\"1797\" data-end=\"1850\"\u003e14mm board is intended for 400mm-centred studwork\u003c\/strong\u003e, while the \u003cstrong data-start=\"1862\" data-end=\"1924\"\u003e22mm board is suitable for 400mm or 600mm-centred studwork\u003c\/strong\u003e. Conluto’s technical sheet also includes detailed maximum substructure spacings for different wall, ceiling and sloped-roof applications, so final installation should always follow the project-specific technical guidance.\u003c\/p\u003e\n\u003cp data-start=\"2186\" data-end=\"2677\"\u003eOnce installed, the board forms part of a full breathable clay system. Joints and fixings are typically finished with \u003cstrong data-start=\"2304\" data-end=\"2346\"\u003eclay adhesive and reinforcement mortar\u003c\/strong\u003e, followed by a reinforcing mesh layer, and then a final clay finish such as \u003cstrong data-start=\"2423\" data-end=\"2483\"\u003efine clay plaster, decorative clay plaster or clay paint\u003c\/strong\u003e. This makes Lightweight Hemp-Clay Building Board an excellent base for natural interior finishes where breathability, appearance and indoor comfort matter.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1iz91iu\" data-start=\"2679\" data-end=\"2695\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"2697\" data-end=\"3582\"\u003e\n\u003cli data-section-id=\"16yp637\" data-start=\"2697\" data-end=\"2814\"\u003e\n\u003cstrong data-start=\"2699\" data-end=\"2730\"\u003eLightweight hemp-clay board\u003c\/strong\u003e for internal walls, ceilings and sloped roofs\u003c\/li\u003e\n\u003cli data-section-id=\"4ci65h\" data-start=\"2815\" data-end=\"2885\"\u003eAvailable in \u003cstrong data-start=\"2830\" data-end=\"2847\"\u003e14mm and 22mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1it4gas\" data-start=\"2886\" data-end=\"3003\"\u003eMade from \u003cstrong data-start=\"2898\" data-end=\"2965\"\u003eclay, hemp fibres and shives, sand, and jute mesh reinforcement\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1o57q7t\" data-start=\"3004\" data-end=\"3081\"\u003eSuitable for \u003cstrong data-start=\"3019\" data-end=\"3080\"\u003etimber frame, studwork, drylining and renovation projects\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1lpazhd\" data-start=\"3082\" data-end=\"3191\"\u003eEasier to handle than heavyweight clay boards due to its lower weight\u003c\/li\u003e\n\u003cli data-section-id=\"1j3ufp3\" data-start=\"3192\" data-end=\"3242\"\u003e\n\u003cstrong data-start=\"3194\" data-end=\"3209\"\u003e14mm board:\u003c\/strong\u003e for \u003cstrong data-start=\"3214\" data-end=\"3240\"\u003e400mm-centred studwork\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"j502k9\" data-start=\"3243\" data-end=\"3300\"\u003e\n\u003cstrong data-start=\"3245\" data-end=\"3260\"\u003e22mm board:\u003c\/strong\u003e for \u003cstrong data-start=\"3265\" data-end=\"3300\"\u003e400mm or 600mm-centred studwork\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"q4pe6s\" data-start=\"3301\" data-end=\"3416\"\u003eBreathable, moisture-regulating and suitable for natural building systems\u003c\/li\u003e\n\u003cli data-section-id=\"1e8fhiq\" data-start=\"3417\" data-end=\"3506\"\u003e\n\u003cstrong data-start=\"3419\" data-end=\"3444\"\u003eThermal conductivity:\u003c\/strong\u003e approx. \u003cstrong data-start=\"3453\" data-end=\"3466\"\u003e0.21 W\/mK\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"bzsdn4\" data-start=\"3507\" data-end=\"3582\"\u003e\n\u003cstrong data-start=\"3509\" data-end=\"3530\"\u003eReaction to fire:\u003c\/strong\u003e \u003cstrong data-start=\"3531\" data-end=\"3542\"\u003eB-s1,d\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong data-start=\"3531\" data-end=\"3542\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/7297\/2461\/files\/Screenshot_2026-04-12_170739.png?v=1776010081\" alt=\"\" width=\"662\" height=\"255\"\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Roundtower Lime Ireland","offers":[{"title":"14mm x 1250mm x 1000mm (Coverage per board = 1.25m2)","offer_id":45903778644141,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true},{"title":"22mm x 1250mm x 1000mm (Coverage per board = 1.25m2)","offer_id":45903778676909,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/7297\/2461\/files\/Lightweight_Hemp-Clay_Building_Board.jpg?v=1776009552"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/7297\/2461\/collections\/Heavy_Clay_Building_Boards.png?v=1776009191","url":"https:\/\/www.roundtowerlime.com\/collections\/clay-building-boards.oembed","provider":"Roundtower Lime Ireland","version":"1.0","type":"link"}