{"title":"Retrofit \u0026 Overlay Underfloor Heating Kits","description":"\u003cp\u003eOverlay kits offer a hassle-free solution for upgrading existing floors. Designed to fit directly over solid, level surfaces—whether tile, concrete, or wood—they eliminate the need for extra insulation underneath. Thanks to their high-density construction, these boards provide a stable base that supports any floor finish, including tiles, right on top\u003c\/p\u003e","products":[{"product_id":"adept-ad-eps400-slim-water-underfloor-heating-kits","title":"Adept AD-EPS400 Slim Water Underfloor Heating Kits","description":"\u003cp\u003e\u003cstrong\u003eAD-EPS400 Underfloor Heating System\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Adept AD-EPS400 water underfloor heating kit uses a pre-routed foil-topped EPS board and adds only 20mm to your floor height. It can be installed on dry and level concrete\/screed or wooden floors, and can be tiled directly over when used with the recommended tile adhesive or underlay.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAD-EPS400 is ready to be tiled directly over when used with the recommended tile adhesive\u003c\/li\u003e\n  \u003cli\u003eQuick and easy to install\u003c\/li\u003e\n  \u003cli\u003eCan be laid onto most existing floors when installed with suitable underlay or adhesive\u003c\/li\u003e\n  \u003cli\u003eUnique design allows the EPS400 board to function as both a thermal conductor and pipe retainer\u003c\/li\u003e\n  \u003cli\u003eMinimal increase in floor height\u003c\/li\u003e\n  \u003cli\u003eNo need to dig up concrete\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adept","offers":[{"title":"15m2","offer_id":40450502492209,"sku":"UFHK15-EPS400","price":878.99,"currency_code":"GBP","in_stock":true},{"title":"30m2","offer_id":40492657967153,"sku":"UFHK30-EPS400","price":1355.99,"currency_code":"GBP","in_stock":true},{"title":"45m2","offer_id":40492657999921,"sku":"UFHK45-EPS400","price":1767.99,"currency_code":"GBP","in_stock":true},{"title":"60m2","offer_id":40492658032689,"sku":"UFHK60-EPS400","price":2261.99,"currency_code":"GBP","in_stock":false},{"title":"75m2","offer_id":40492658065457,"sku":"UFHK75-EPS400","price":2754.99,"currency_code":"GBP","in_stock":false},{"title":"90m2","offer_id":40492658098225,"sku":"UFHK90-EPS400","price":3248.99,"currency_code":"GBP","in_stock":false},{"title":"105m2","offer_id":40492658130993,"sku":"UFHK105-EPS400","price":3742.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0564\/0522\/9617\/files\/Adept-AD-EPS400-001-2025-Multi-Loop.jpg?v=1752498879"},{"product_id":"adept-ad-slim-water-underfloor-heating-kit","title":"Adept AD-SLIM Water Underfloor Heating Kit","description":"\u003cp\u003eAdept AD-SLIM Underfloor Heating is the Premier Heating Kit, including an A Rated Pump and 12mm PERT Pipe.\u003c\/p\u003e\n\u003cp\u003eAdept AD-SLIM Heating Kits are all designed for a single zone, however can be adjusted with the use of any Adept or Heatmiser controls from within our store. Each Kit is designed to use 150mm centres using a 18mm Grooved High Density Board. The Kits are designed to output 100w\/m2.\u003c\/p\u003e\n\u003cp\u003eFinished floors, such as tiles can be installed directly on AD-SLIM panels without the need for over-boarding.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVinyl \u0026amp; Carpet floor finishes will need over-boarding with minimum 6mm plywood before you install the floor finish. You can also use self levelling compound with 5mm latex.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg height=\"405\" width=\"600\" alt=\"ultraslim.gif\" src=\"https:\/\/cdn11.bigcommerce.com\/s-ximc6g2a\/product_images\/uploaded_images\/ultraslim.gif\" title=\"ultraslim.gif\" class=\"__mce_add_custom__\"\u003e\u003c\/p\u003e\n\u003c!-- [if !excel]\u003e  \u003c![endif]--\u003e\u003c!--The following information was generated by Microsoft Office Excel's Publish as Web Page wizard.--\u003e\u003c!--If the same item is republished from Excel, all information between the DIV tags will be replaced.--\u003e\u003c!-----------------------------\u003e\u003c!--START OF OUTPUT FROM EXCEL PUBLISH AS WEB PAGE WIZARD --\u003e","brand":"Adept","offers":[{"title":"12m2","offer_id":40450502623281,"sku":"UFHK12OH","price":866.49,"currency_code":"GBP","in_stock":true},{"title":"21m2","offer_id":40492659671089,"sku":"UFHK21OH","price":1258.49,"currency_code":"GBP","in_stock":false},{"title":"25m2","offer_id":40492659703857,"sku":"UFHK25OH","price":1436.99,"currency_code":"GBP","in_stock":false},{"title":"33m2","offer_id":40492659736625,"sku":"UFHK33OH","price":1799.99,"currency_code":"GBP","in_stock":true},{"title":"39m2","offer_id":40492659769393,"sku":"UFHK39OH","price":2021.99,"currency_code":"GBP","in_stock":true},{"title":"51m2","offer_id":40492659802161,"sku":"UFHK51OH","price":2562.49,"currency_code":"GBP","in_stock":false},{"title":"63m2","offer_id":40492659834929,"sku":"UFHK63OH","price":2968.99,"currency_code":"GBP","in_stock":false},{"title":"75m2","offer_id":40492659867697,"sku":"UFHK75OH","price":3616.49,"currency_code":"GBP","in_stock":false},{"title":"84m2","offer_id":40492659900465,"sku":"UFHK84OH","price":3998.99,"currency_code":"GBP","in_stock":false},{"title":"90m2","offer_id":40492659933233,"sku":"UFHK90OH","price":4256.49,"currency_code":"GBP","in_stock":false},{"title":"97m2","offer_id":40492659966001,"sku":"UFHK97OH","price":4571.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0564\/0522\/9617\/files\/Adept-ADSLIM-2025-Multi-Loop.jpg?v=1752500243"},{"product_id":"adept-ad-cxps-water-underfloor-heating-kits","title":"Adept AD-CXPS Water Underfloor Heating Overlay Kits","description":"\u003cp\u003eThe Adept AD-CXPS underfloor heating system uses a pre-routed XPS cement-coated board that adds only 18–20mm to the floor height. It can be installed on a variety of floor bases and works with any floor finish.\u003c\/p\u003e\n\u003cp\u003eEach CXPS board measures 1200 x 600 x 18mm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCan be installed directly on top of most floor bases, with only 18–20mm added to the floor height\u003c\/li\u003e\n\u003cli\u003eSuitable for tiling directly over. Alternatively, use 5mm of latex to accommodate other floor finishes\u003c\/li\u003e\n\u003cli\u003eQuick and hassle-free installation—simply bend the pipe into the grooves\u003c\/li\u003e\n\u003cli\u003eUnique design allows the CXPS board to act as both a pipe retainer and an integral part of the floor structure\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adept","offers":[{"title":"12m2","offer_id":40450502656049,"sku":"UFHK12-CXPS","price":774.99,"currency_code":"GBP","in_stock":false},{"title":"21m2","offer_id":40492657606705,"sku":"UFHK21-CXPS","price":1134.99,"currency_code":"GBP","in_stock":false},{"title":"25m2","offer_id":40492657639473,"sku":"UFHK25-CXPS","price":1294.99,"currency_code":"GBP","in_stock":false},{"title":"33m2","offer_id":40492657672241,"sku":"UFHK33-CXPS","price":1511.99,"currency_code":"GBP","in_stock":false},{"title":"39m2","offer_id":40492657705009,"sku":"UFHK39-CXPS","price":1741.99,"currency_code":"GBP","in_stock":false},{"title":"51m2","offer_id":40492657737777,"sku":"UFHK51-CXPS","price":2030.99,"currency_code":"GBP","in_stock":false},{"title":"63m2","offer_id":40492657770545,"sku":"UFHK63-CXPS","price":2434.99,"currency_code":"GBP","in_stock":false},{"title":"75m2","offer_id":40492657803313,"sku":"UFHK75-CXPS","price":2857.99,"currency_code":"GBP","in_stock":false},{"title":"84m2","offer_id":40492657836081,"sku":"UFHK84-CXPS","price":3161.99,"currency_code":"GBP","in_stock":false},{"title":"90m2","offer_id":40492657868849,"sku":"UFHK90-CXPS","price":3354.99,"currency_code":"GBP","in_stock":false},{"title":"97m2","offer_id":40492657901617,"sku":"UFHK97-CXPS","price":3602.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0564\/0522\/9617\/files\/Adept-AD-CXPS-2025---Multi-Loop.jpg?v=1752499140"},{"product_id":"adept-ad-chipboard-foiled-grooved-water-underfloor-heating-kits","title":"Adept AD-CHIPBOARD Foiled Grooved Water Underfloor Heating Kits","description":"\u003cp data-start=\"145\" data-end=\"468\"\u003eThe Adept AD-CHIPBOARD Underfloor Heating Kit is a premium single-zone system featuring 12mm PERT pipe, pre-grooved 22mm foiled chipboard panels, and an A-rated pump. Designed for 150mm pipe spacing, each kit delivers up to 100 W\/m² of efficient and even heat, and can be easily integrated with Adept or Heatmiser controls.\u003c\/p\u003e\n\u003cp data-start=\"470\" data-end=\"706\"\u003eEach 2400 x 600 x 22mm panel is made from P5 moisture-resistant chipboard with foil-faced grooves for fast pipe installation. Panels are tongue and grooved, glued to adjoining panels and joists, then screwed down before laying the pipe.\u003c\/p\u003e\n\u003cp data-start=\"708\" data-end=\"1067\"\u003eFlooring finishes like carpet, laminate, or timber can be laid over a minimum 6mm plywood layer. For tiles or vinyl, a suitable sub-deck is required—this may involve thicker ply, tile backer board, or a skimmed surface. A 6mm flooring-grade ply, bonded and fixed to the chipboard, acts as a protective layer, preserving the system during future floor changes.\u003c\/p\u003e\n\u003cp data-start=\"1069\" data-end=\"1143\"\u003eInstall on joists spaced no more than 600mm apart with insulation between.\u003c\/p\u003e\n\u003c!-- [if !excel]\u003e  \u003c![endif]--\u003e\u003c!--The following information was generated by Microsoft Office Excel's Publish as Web Page wizard.--\u003e\u003c!--If the same item is republished from Excel, all information between the DIV tags will be replaced.--\u003e\u003c!-----------------------------\u003e\u003c!--START OF OUTPUT FROM EXCEL PUBLISH AS WEB PAGE WIZARD --\u003e","brand":"Adept","offers":[{"title":"12m2","offer_id":40450502721585,"sku":"UFHK12TG","price":1425.49,"currency_code":"GBP","in_stock":false},{"title":"21m2","offer_id":40492069912625,"sku":"UFHK21TG","price":1819.99,"currency_code":"GBP","in_stock":false},{"title":"25m2","offer_id":40492069945393,"sku":"UFHK25TG","price":2027.99,"currency_code":"GBP","in_stock":false},{"title":"33m2","offer_id":40492069978161,"sku":"UFHK33TG","price":2443.99,"currency_code":"GBP","in_stock":false},{"title":"39m2","offer_id":40492070010929,"sku":"UFHK39TG","price":2807.99,"currency_code":"GBP","in_stock":false},{"title":"51m2","offer_id":40492070043697,"sku":"UFHK51TG","price":3431.99,"currency_code":"GBP","in_stock":false},{"title":"63m2","offer_id":40492070076465,"sku":"UFHK63TG","price":4263.99,"currency_code":"GBP","in_stock":false},{"title":"75m2","offer_id":40492070109233,"sku":"UFHK75TG","price":4887.99,"currency_code":"GBP","in_stock":false},{"title":"84m2","offer_id":40492070142001,"sku":"UFHK84TG","price":5511.99,"currency_code":"GBP","in_stock":false},{"title":"90m2","offer_id":40492070174769,"sku":"UFHK90TG","price":5875.99,"currency_code":"GBP","in_stock":false},{"title":"97m2","offer_id":40492070207537,"sku":"UFHK97TG","price":6239.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0564\/0522\/9617\/files\/Adept--AD-CHIPBOARD-2025.jpg?v=1752504213"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0564\/0522\/9617\/collections\/Adept-AD-CXPS-Water-Underfloor-Heating-Kit-2024__64876.jpg?v=1725359467","url":"https:\/\/underfloorheatingonline.co.uk\/collections\/retrofit-overlay-underfloor-heating-kits.oembed","provider":"Underfloor Heating Online","version":"1.0","type":"link"}