{"product_id":"120g-green-roof-filter-layer-1-5m-x-100m","title":"UGR 120g Green Roof Filter Layer 1.5m x 100m","description":"\u003ch6\u003eDescription\u003c\/h6\u003e\n\u003ch3\u003eKeep your green roof drainage layer flowing freely\u003c\/h3\u003e\n\u003cp\u003eUGR 120g Green Roof Filter Layer 1.5m x 100m is a durable polypropylene geotextile installed between the drainage membrane and growing substrate in a green roof system.\u003c\/p\u003e\n\u003cp\u003eThe filter fabric allows water to pass through freely while preventing substrate fines, soil and other small particles from entering and clogging the drainage cavities below. This helps preserve the drainage performance of the system and protects the water-storage spaces within the membrane.\u003c\/p\u003e\n\u003cp\u003eIt is particularly suited for use above drainage and storage membranes that do not have their own bonded filter layer.\u003c\/p\u003e\n\u003ch3\u003eTough, permeable and easy to install\u003c\/h3\u003e\n\u003cp\u003eUGR 120g Green Roof Filter Layer combines high water permeability with the strength needed for use beneath green roof growing media. Key benefits include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh tear and puncture resistance\u003c\/li\u003e\n\u003cli\u003eTough and durable polypropylene construction\u003c\/li\u003e\n\u003cli\u003eWater permeability of 77l\/(m²·s)\u003c\/li\u003e\n\u003cli\u003eRecyclable material\u003c\/li\u003e\n\u003cli\u003eUV-stable construction\u003c\/li\u003e\n\u003cli\u003eConforms to GRO performance requirements for a filter layer\u003c\/li\u003e\n\u003cli\u003eLarge 1.5m x 100m roll covering 150m²\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIts 80μm opening size helps filter fine particles while maintaining water flow and fast drainage through the roof build-up.\u003c\/p\u003e\n\u003ch3\u003eWhere the filter layer fits 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\u003eGreen roof drainage and storage membrane\u003c\/li\u003e\n\u003cli\u003eUGR 120g Green Roof Filter Layer\u003c\/li\u003e\n\u003cli\u003eGrowing substrate\u003c\/li\u003e\n\u003cli\u003eVegetation\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eUGR 120g Green Roof Filter Layer is designed for use above products including the \u003ca href=\"\/products\/40mm-storage-drainage-board-1m-x-2m\"\u003eUGR 40mm\u003c\/a\u003e and \u003ca href=\"\/products\/60mm-storage-drainage-board-1m-x-2m\"\u003eUGR 60mm\u003c\/a\u003e green roof storage and drainage boards.\u003c\/p\u003e\n\u003ch3\u003eInstalling the green roof filter layer\u003c\/h3\u003e\n\u003cp\u003eInstall the filter fabric after the drainage membrane has been correctly positioned.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRoll the filter layer out across the drainage membrane.\u003c\/li\u003e\n\u003cli\u003eCut the fabric to fit the roof layout where required.\u003c\/li\u003e\n\u003cli\u003eOverlap adjoining sections by at least 150mm.\u003c\/li\u003e\n\u003cli\u003eDo not take the filter layer across the top of drainage outlets.\u003c\/li\u003e\n\u003cli\u003eAt roof edges, turn the fabric upwards where needed to separate the growing substrate from a pebble or gravel border.\u003c\/li\u003e\n\u003cli\u003eBegin applying the growing substrate along the seams of the filter fabric.\u003c\/li\u003e\n\u003cli\u003eContinue adding the substrate while keeping the fabric taut and correctly positioned.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eApplying the growing medium along the seams first helps prevent the geotextile from moving or sinking into the cavities of the drainage membrane. Turning the filter layer upwards at perimeter details can also stop substrate fines from contaminating adjacent pebble borders.\u003c\/p\u003e\n\u003ch3\u003eAlso suitable for land drains\u003c\/h3\u003e\n\u003cp\u003eThe geotextile can also be used as a filtration layer around land drains in suitable external groundworks and waterproofing applications.\u003c\/p\u003e\n\u003cp\u003eIn this type of installation, the drainage pipe and surrounding free-draining stone are enclosed by the filter fabric. This helps stop soil fines from entering the aggregate and reducing the effectiveness of the drainage system.\u003c\/p\u003e\n\u003ch3\u003eDurability and exposure\u003c\/h3\u003e\n\u003cp\u003eThe product has a stated minimum durability of 25 years when used within the conditions specified in the technical data.\u003c\/p\u003e\n\u003cp\u003eTo achieve this stated durability, the fabric should be covered or backfilled within 14 days of installation. The durability information applies in natural soils with a pH between 4 and 9 and soil temperatures of no more than 25°C.\u003c\/p\u003e\n\u003ch3\u003eImportant suitability note\u003c\/h3\u003e\n\u003cp\u003eUGR 120g Green Roof Filter Layer is not a drainage, water-storage or waterproofing membrane. It must be installed above an appropriate drainage layer, such as UGR 40mm or UGR 60mm Storage \u0026amp; Drainage Board, and should never be laid across drainage outlets.\u003c\/p\u003e\n\u003cp\u003eThe separate fabric is not normally required directly above the roll versions of UGR 20mm or UGR 25mm Storage \u0026amp; Drainage Membrane because those products already incorporate a bonded geotextile filter layer — see the \u003ca href=\"\/products\/20mm-storage-drainage-membrane-2m-x-10m\"\u003eUGR 20mm\u003c\/a\u003e and \u003ca href=\"\/products\/25mm-storage-drainage-membrane\"\u003eUGR 25mm\u003c\/a\u003e green roof storage and drainage membranes.\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;\"\u003ePolypropylene\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;\"\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eThickness\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e0.6–0.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eMaterial weight\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e120g\/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;\"\u003eRoll width\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e1.5m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eRoll length\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e100m\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;\"\u003e150m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eMinimum joint overlap\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eTensile strength MD\/CMD\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e10.0\/10.0kN\/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;\"\u003eStatic puncture resistance (CBR)\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e1.4kN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eOpening size\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e80μm\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 permeability\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003e77l\/(m²·s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eDurability\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003eMinimum 25 years (specified conditions)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px 6px 0; vertical-align: top;\"\u003eCompliance\u003c\/th\u003e\n\u003ctd style=\"padding: 6px 0;\"\u003eConforms to GRO filter-layer requirements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch6\u003eFAQs\u003c\/h6\u003e\n\u003ch4\u003eWhat does a green roof filter layer do?\u003c\/h4\u003e\n\u003cp\u003eIt lets water pass into the drainage membrane while stopping soil, substrate fines and other particles from blocking the drainage and storage cavities.\u003c\/p\u003e\n\u003ch4\u003eHow much should adjoining sections overlap?\u003c\/h4\u003e\n\u003cp\u003eAt least 150mm. Adding substrate along the seams first helps hold the fabric taut.\u003c\/p\u003e\n\u003ch4\u003eShould the filter fabric cover drainage outlets?\u003c\/h4\u003e\n\u003cp\u003eNo — do not take the filter layer over drainage outlets, as this could interfere with water leaving the roof.\u003c\/p\u003e\n\u003ch4\u003eDo I need this filter layer above UGR 20mm or UGR 25mm Storage \u0026amp; Drainage Membrane?\u003c\/h4\u003e\n\u003cp\u003eNo. The roll versions of UGR 20mm and UGR 25mm Storage \u0026amp; Drainage Membrane already include a bonded geotextile filter. This layer is for membranes like UGR 40mm Storage \u0026amp; Drainage Board and 60P that don't.\u003c\/p\u003e\n\u003ch6\u003eHelp\u003c\/h6\u003e\n\u003ch3\u003eNeed help choosing the correct filter layer?\u003c\/h3\u003e\n\u003cp\u003eUnsure whether your drainage membrane already includes a bonded geotextile, or how to detail the fabric around outlets and roof edges? Our in-house technical team can provide free, practical guidance on the correct layers for your green roof system.\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":54207510282583,"sku":"UGRFL150","price":178.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0954\/0150\/9207\/files\/permaseal_geotextile_120_full_roll_shot_fw.jpg?v=1785811813","url":"https:\/\/urbangreenroofs.com\/products\/120g-green-roof-filter-layer-1-5m-x-100m","provider":"Urban Green Roofs","version":"1.0","type":"link"}