{"product_id":"40mm-storage-drainage-board-1m-x-2m","title":"UGR 40mm Storage \u0026 Drainage Board 1m x 2m","description":"\u003ch6\u003eDescription\u003c\/h6\u003e\n\u003ch3\u003eHigh-capacity drainage and water storage\u003c\/h3\u003e\n\u003cp\u003eUGR 40mm Storage \u0026amp; Drainage Board is a heavy-duty water-management layer designed primarily for intensive green roofs and hard landscaping applications.\u003c\/p\u003e\n\u003cp\u003eIts deep 40mm cavities retain around 15 litres of water per square metre, helping maintain moisture around the growing substrate and vegetation between periods of rainfall. Perforations within the membrane allow excess water to drain away, reducing the risk of the planting layers becoming saturated.\u003c\/p\u003e\n\u003cp\u003eThe combination of high water storage and strong drainage performance makes UGR 40mm Storage \u0026amp; Drainage Boards particularly useful for heavily planted roofs, long drainage runs and roofs with a low gradient.\u003c\/p\u003e\n\u003ch3\u003eBuilt for intensive planting and heavier loads\u003c\/h3\u003e\n\u003cp\u003eManufactured from 100% recycled high-density polyethylene, UGR 40mm Storage \u0026amp; Drainage Board has an approximate compressive strength of 200kN\/m² — equivalent to around 20 tonnes per square metre. This makes it suitable for a wide variety of soft and hard landscaping applications, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIntensive green roofs\u003c\/li\u003e\n\u003cli\u003eRoof gardens\u003c\/li\u003e\n\u003cli\u003eWildflower, plug and seed planting\u003c\/li\u003e\n\u003cli\u003eGrass, shrubs and medium-sized planting\u003c\/li\u003e\n\u003cli\u003eCommercial and residential roofs\u003c\/li\u003e\n\u003cli\u003eInverted warm roofs and cold roofs\u003c\/li\u003e\n\u003cli\u003eBalconies and terraces\u003c\/li\u003e\n\u003cli\u003eLandscaped areas above underground car parks\u003c\/li\u003e\n\u003cli\u003eGround-level landscaping above basement accommodation\u003c\/li\u003e\n\u003cli\u003eWalkable decks\u003c\/li\u003e\n\u003cli\u003eDrivable decks\u003c\/li\u003e\n\u003cli\u003ePaving and slab build-ups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIts drainage capacity also allows it to accommodate large drainage lengths or low roof slopes within a correctly designed system.\u003c\/p\u003e\n\u003ch3\u003eWater storage for demanding planting schemes\u003c\/h3\u003e\n\u003cp\u003eIntensive green roofs generally use deeper growing substrates and support larger, more varied vegetation than lightweight extensive systems. UGR 40mm Storage \u0026amp; Drainage Boards help manage water within these deeper build-ups by:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRetaining useful rainfall within its 40mm cavities\u003c\/li\u003e\n\u003cli\u003eAllowing excess water to pass into the drainage space\u003c\/li\u003e\n\u003cli\u003eSupporting heavily planted areas during drier periods\u003c\/li\u003e\n\u003cli\u003eProviding approximately 3.78l\/(s·m) drainage capacity at a hydraulic gradient of 0.10\u003c\/li\u003e\n\u003cli\u003eWithstanding substantial loads from substrate, planting and compatible hard landscaping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA separate geotextile filter layer is required above UGR 40mm Boards when they are used beneath planting substrate. This stops soil and fine particles from entering and obstructing the storage cavities. Use the \u003ca href=\"\/products\/120g-green-roof-filter-layer-1-5m-x-100m\"\u003eUGR 120g Green Roof Filter Layer\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhere UGR 40mm Storage \u0026amp; Drainage Boards fit in the system\u003c\/h3\u003e\n\u003cp\u003eA typical intensive green roof build-up may include:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eStructural roof deck\u003c\/li\u003e\n\u003cli\u003ePrimary waterproofing layer\u003c\/li\u003e\n\u003cli\u003eRoot barrier\u003c\/li\u003e\n\u003cli\u003eProtection fleece\u003c\/li\u003e\n\u003cli\u003eUGR 40mm Storage \u0026amp; Drainage Board 1m x 2m\u003c\/li\u003e\n\u003cli\u003eSeparate geotextile filter layer\u003c\/li\u003e\n\u003cli\u003eIntensive green roof substrate\u003c\/li\u003e\n\u003cli\u003ePlanting or turf\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eFor dedicated root protection, install the \u003ca href=\"\/products\/green-roof-root-barrier\"\u003eUGR Green Roof Root Barrier\u003c\/a\u003e beneath the drainage membrane. A protection fleece may also be required to reduce the risk of light mechanical damage to the waterproofing and root barrier — see the \u003ca href=\"\/products\/green-roof-protection-fleece-300\"\u003eUGR Green Roof Protection Fleece 300\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eInstalling UGR 40mm Boards\u003c\/h3\u003e\n\u003cp\u003eThe application surface should have a gradient of at least 2%. Complete the horizontal waterproofing, root barrier and any other specified underlying layers before installing the slabs.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eLay the 1m x 2m slabs horizontally with the cavity openings facing upwards.\u003c\/li\u003e\n\u003cli\u003ePosition adjoining slabs edge to edge using butt joints; overlapping is not normally required.\u003c\/li\u003e\n\u003cli\u003eCut slabs to fit using a suitable knife, taking care not to damage the waterproofing or other layers beneath.\u003c\/li\u003e\n\u003cli\u003eWhere additional protection is required at a joint, a compatible single-sided membrane tape may be applied over the connection.\u003c\/li\u003e\n\u003cli\u003eFor planted areas, install UGR 120g Green Roof Filter Layer over the completed surface.\u003c\/li\u003e\n\u003cli\u003eApply the specified intensive green roof substrate over the filter layer.\u003c\/li\u003e\n\u003cli\u003eComplete the system with the selected vegetation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThe manageable slab size allows individual sections to be positioned and cut without handling a large roll.\u003c\/p\u003e\n\u003ch3\u003eWalkable and drivable applications\u003c\/h3\u003e\n\u003cp\u003eFor walkable areas without vegetation, a geotextile filter layer is not used. The specified base and bedding materials are instead applied directly onto the membrane and into the cavities before the paving or slabs are installed.\u003c\/p\u003e\n\u003cp\u003eDrivable applications require a suitable sub-base and bedding course between UGR 40mm Storage \u0026amp; Drainage Board and the finished pavement. The complete build-up, loading and drainage design must be appropriately specified for the intended use.\u003c\/p\u003e\n\u003ch3\u003eDurable and long-lasting\u003c\/h3\u003e\n\u003cp\u003eUGR 40mm Storage \u0026amp; Drainage Board is:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMade from 100% recycled HDPE\u003c\/li\u003e\n\u003cli\u003eHighly resistant to water\u003c\/li\u003e\n\u003cli\u003eResistant to alkalis and saline solutions\u003c\/li\u003e\n\u003cli\u003eResistant to organic acids\u003c\/li\u003e\n\u003cli\u003eResistant to bacteria, fungi and other small organisms\u003c\/li\u003e\n\u003cli\u003eUnaffected by minerals\u003c\/li\u003e\n\u003cli\u003eSuitable for temperatures between -30°C and +80°C\u003c\/li\u003e\n\u003cli\u003eGuaranteed against deterioration for 30 years\u003c\/li\u003e\n\u003cli\u003eTested and CE marked to the relevant standard\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIts stated life expectancy is equal to that of the structure under DIN 9001:2000.\u003c\/p\u003e\n\u003ch3\u003eImportant suitability note\u003c\/h3\u003e\n\u003cp\u003eUGR 40mm Storage \u0026amp; Drainage Board is a deep, heavy-duty drainage layer intended mainly for intensive planting and compatible hard landscaping. For a lighter extensive green roof that does not require this level of water storage or load resistance, consider the \u003ca href=\"\/products\/20mm-storage-drainage-membrane-2m-x-10m\"\u003eUGR 20mm Storage \u0026amp; Drainage Membrane 2m x 10m\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eUGR 40mm Board is not a primary waterproofing membrane and must be installed above a suitable waterproofing system.\u003c\/p\u003e\n\u003ch6\u003eSpecifications\u003c\/h6\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eMaterial\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e100% recycled HDPE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eMembrane weight\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003eApprox. 2,200g\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eStud height\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003eApprox. 40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eNumber of studs\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e164\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eColour\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eSlab dimensions\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e1m x 2m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eCoverage\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e2m² per slab\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eCompressive strength\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003eApprox. 200kN\/m² (~20 tonnes\/m²)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eWater-storage capacity\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003eApprox. 15l\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eWater-drainage capacity (i=0.10)\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003eApprox. 3.78l\/(s·m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eTemperature resistance\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e-30°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eFire resistance\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003eClass E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eAccreditation\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003eTested and CE marked\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch6\u003eFAQs\u003c\/h6\u003e\n\u003ch4\u003eHow much water do UGR 40mm Storage \u0026amp; Drainage Boards store?\u003c\/h4\u003e\n\u003cp\u003eIts 40mm cavities store approximately 15 litres per square metre.\u003c\/p\u003e\n\u003ch4\u003eDo UGR 40mm Boards include a filter layer?\u003c\/h4\u003e\n\u003cp\u003eNo. A separate geotextile filter layer is required above it when installed beneath substrate — use Filter Layer 120.\u003c\/p\u003e\n\u003ch4\u003eHow are the slabs joined?\u003c\/h4\u003e\n\u003cp\u003eSimple butt joints, edges alongside each other; overtape may be applied where extra joint protection is required.\u003c\/p\u003e\n\u003ch4\u003eCan UGR 40mm Boards be installed beneath paving?\u003c\/h4\u003e\n\u003cp\u003eYes, in compatible walkable and drivable build-ups. The cups must be filled and correct bedding or sub-base installed for the loading.\u003c\/p\u003e\n\u003ch6\u003eHelp\u003c\/h6\u003e\n\u003ch3\u003eFree advice for intensive green roof projects\u003c\/h3\u003e\n\u003cp\u003eChoosing the correct drainage layer is particularly important when planning deeper substrates, heavier planting or paved areas. Our in-house technical team can provide free, practical advice on whether UGR 40mm Storage \u0026amp; Drainage Boards are suitable and which root barrier, protection and filter layers your build-up may require.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEmail:\u003c\/strong\u003e \u003ca href=\"mailto:info@urbangreenroofs.com\" title=\"mailto:info@urbangreenroofs.com\"\u003einfo@urbangreenroofs.com\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTelephone:\u003c\/strong\u003e \u003ca href=\"tel:+44%20117%20370%204018\" title=\"tel:+44 117 370 4018\"\u003e+44 117 370 4018\u003c\/a\u003e\u003c\/p\u003e","brand":"Urban Green Roofs","offers":[{"title":"Default Title","offer_id":54207509791063,"sku":"UGR40SDB2","price":38.25,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/0150\/9207\/files\/UGR_40mm_Storage_Drainage_Board_5.jpg?v=1788434444","url":"https:\/\/urbangreenroofs.com\/products\/40mm-storage-drainage-board-1m-x-2m","provider":"Urban Green Roofs","version":"1.0","type":"link"}