{"id":5952,"date":"2026-10-16T05:10:53","date_gmt":"2026-10-16T05:10:53","guid":{"rendered":"https:\/\/www.relyirgrass.com\/artificial-grass-drainage-tiles-sub-base-drainage-wo\/"},"modified":"2026-11-09T09:24:07","modified_gmt":"2026-11-09T09:24:07","slug":"artificial-grass-drainage-tiles-sub-base-drainage-wo","status":"publish","type":"post","link":"https:\/\/www.relyirgrass.com\/de\/artificial-grass-drainage-tiles-sub-base-drainage-wo\/","title":{"rendered":"Wie die Drainage unter Kunstrasen wirklich funktioniert"},"content":{"rendered":"<style>\nh2 { font-size: 1.6em; line-height: 1.3; margin: 40px 0 18px; }\nh3 { font-size: 1.2em; line-height: 1.35; margin: 26px 0 12px; }\np { line-height: 1.8; margin-bottom: 28px; }\ntable { display: table !important; width: 100% !important; border-collapse: collapse; margin-bottom: 28px; }\nth { text-align: left; padding: 12px 14px; background: #1a5c2e; color: #ffffff; font-weight: 600; }\ntd { padding: 12px 14px; border-bottom: 1px solid #e5e5e5; vertical-align: top; }\nfigure { margin: 0 0 28px; }\nfigure img { width: 100%; height: auto; border-radius: 8px; }\nfigcaption { text-align: center; font-style: italic; color: #666; font-size: .9em; margin-top: 8px; }\n.callout { background:#f0f7f2; border-left:4px solid #1a5c2e; border-radius:4px; padding:18px 20px; margin:0 0 28px; }\n<\/style>\n<p>Most drainage complaints we hear do not start with the carpet. An installer lifts a corner after a storm and finds turf that drains perfectly at the surface while water sits trapped at the backing-base interface. The roll was asked to pass water through, and it did. The layer beneath was never asked to carry it anywhere. That gap between a perforated surface and a passive base is where artificial grass drainage tiles earn their name, and where most purchasing decisions go wrong.<\/p>\n<p>This page explains what actually decides drain-down. The gravity mechanics of the base come first, then the component families the market lumps together as drainage tiles. Last come the continuity rules that let one link hand water to the next. Our perforations are the first link of that chain, not the whole of it, and the same humility applies to every component on the shelf. Read it as a system map rather than a product sheet.<\/p>\n<h2 id=\"gravity-ceiling\">Gravity Only Moves What the Base Lets Go<\/h2>\n<p>Buyers read the word drainage and picture holes in the carpet. Perforations are only link one of the water path, because what happens after water leaves the backing decides the field after a storm. Set artificial grass drainage tiles over a graded aggregate base and water crosses the backing, then moves through the stone voids toward the field-edge drain line. That is the free-draining aggregate route, per the <a href=\"https:\/\/naturalturfalliance.org\/wp-content\/uploads\/2022\/11\/Smart-Guide-to-Synthetic-Hybrid-Football-Fields-Issue-v-2.01.pdf\" target=\"_blank\" rel=\"noopener\">NTA Smart Guide to synthetic fields<\/a>.<\/p>\n<p>There the void ratio of graded aggregate sits near 40%, with structural depth sized for the storage the design asks it to hold and release. Highway engineering states the same principle: a permeable base exists to remove infiltration, and it works best directly beneath the surface. The NCHRP synthesis on permeable pavement bases makes that position explicit.<\/p>\n<figure>\n<img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-gravel-base-installation-cross-section.jpg\" alt=\"Lifted edge of artificial grass showing the open crushed-stone base that receives water from the turf above\" width=\"1120\" height=\"680\" class=\"wp-image-2662\" data-img-slot=\"1\" loading=\"eager\" srcset=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-gravel-base-installation-cross-section.jpg 1120w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-gravel-base-installation-cross-section-300x182.jpg 300w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-gravel-base-installation-cross-section-1024x622.jpg 1024w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-gravel-base-installation-cross-section-768x466.jpg 768w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-gravel-base-installation-cross-section-18x12.jpg 18w\" sizes=\"(max-width: 1120px) 100vw, 1120px\" \/><figcaption>The water path starts at the backing perforations, but the void, the grade and the outlet decide where it ends.<\/figcaption><\/figure>\n<p>Slope, fall and underdrains are decided before any component arrives on site, which is why they sit upstream of this page. For that wider ground story, see <a href=\"https:\/\/www.relyirgrass.com\/artificial-grass-drainage-bases\/\">how slope and underdrains shape the sub-base before any tile is laid<\/a>. What matters here is narrower: whatever component you place, the base beneath must be able to let water go.<\/p>\n<h3>The Saturation Ceiling of Fine Gradations<\/h3>\n<p>Fine gradations make gravity drainage nominal. The best measure of drainability is the minimum degree of saturation that gravity drainage can reach on a given material. A fine-grained base can stay fully saturated even at the maximum suction gravity drainage can build, as the TRB paper on base drainability documents. Over-compaction destroys the same voids from the other direction, squeezing out the storage a base needs. A denser base is not a better base; it is often a wetter one.<\/p>\n<h3>Time and Slope: The Two Grading Criteria<\/h3>\n<p>Engineering acceptance is a clock, not a feeling. Iowa State&#8217;s pavement design manual wants free water out of the structure within 2 hours after rainfall ends, with a minimum 2% cross slope keeping the base drained. The highest-class US highways target 50% of drainable water gone in 1 hour, and most interstates in 2. Both are road-engineering acceptance calibers, not turf-universal values. They still teach the habit worth copying: put a clock and a slope on your own base and judge it the same way.<\/p>\n<h2 id=\"component-families\">The Component Families and How Each One Carries Water<\/h2>\n<p>What the market sells as artificial grass drainage tiles is really three engineering lineages plus one lightweight derivative, each conducting water by a different mechanism. Lumping them together is how sheets get specified for jobs that needed cells. The families below are separated by how they move water, not by how they look in a catalogue photo.<\/p>\n<figure>\n<img decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/10\/artificial-grass-drainage-tiles-sub-base-drainage-wo-slot2-grass-grid-paver-lawn.webp\" alt=\"Interlocking concrete grass grid pavers with turf growing through the open cells\" width=\"1100\" height=\"734\" class=\"wp-image-5942\" data-img-slot=\"2\" loading=\"lazy\" srcset=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/10\/artificial-grass-drainage-tiles-sub-base-drainage-wo-slot2-grass-grid-paver-lawn.webp 1100w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/10\/artificial-grass-drainage-tiles-sub-base-drainage-wo-slot2-grass-grid-paver-lawn-300x200.webp 300w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/10\/artificial-grass-drainage-tiles-sub-base-drainage-wo-slot2-grass-grid-paver-lawn-1024x683.webp 1024w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/10\/artificial-grass-drainage-tiles-sub-base-drainage-wo-slot2-grass-grid-paver-lawn-768x512.webp 768w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/10\/artificial-grass-drainage-tiles-sub-base-drainage-wo-slot2-grass-grid-paver-lawn-18x12.webp 18w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><figcaption>The framework grid family: interlocking pavers that carry load while the open cells pass water downward.<\/figcaption><\/figure>\n<h3>Dimpled Sheets and Geonets: In-Plane Conductors<\/h3>\n<p>Dimpled sheets and geonets conduct water within their own plane, which is why their primary function in the geosynthetics family is drainage. In-plane capacity falls as normal stress rises, so the number that matters is measured under load. ASTM D4716 is the standard that measures in-plane flow per unit width and hydraulic transmissivity at constant head under varying normal stress, per the <a href=\"https:\/\/www.astm.org\/d4716_d4716m-20.html\" target=\"_blank\" rel=\"noopener\">ASTM D4716 test method page<\/a>.<\/p>\n<p>Keep two calibers apart. An index test supports commercial acceptance comparisons, while a performance test lets the user pick gradients and contact surfaces to mirror the field. Numbers from the two are not interchangeable. The method also applies only to products with a continuous in-plane flow path, which is the exact boundary between drainage sheets and porous fills. So ask for the test caliber before comparing any two datasheets.<\/p>\n<h3>Drainage Cells: The Structured Void<\/h3>\n<p>Drainage cells work on a different mechanism: a structured void. In the sports-field build the cell sits within a dry-pavement assembly with a geotech lining, placed above or below the shock pad. Water exits by gravity toward a collector drain, helped by roughly a 0.8% incline, per the NTA guide.<\/p>\n<p>Mainstream thickness sits near 30 mm, and sizing has to match the design rain event. A 10 mm cell once failed because it could not carry the volume asked of it. Fast drain-down also presumes the downstream storm line can absorb the discharge speed, otherwise the cell only delivers water to the bottleneck faster.<\/p>\n<h3>Grass Grids: Framework First, Drainage Second<\/h3>\n<p>Grass grids are concrete or plastic frameworks filled with turf or gravel. The frame carries the load while the large spaces between its walls accept the infiltration, per the Oregon State fact sheet on porous flexible paving. A 2006 study found turf establishes more easily in plastic units because plastic does not absorb water and preserves soil moisture, and the plastic frames also outlasted concrete. Of the three families, this is the only one that is structural and drainage in a single member.<\/p>\n<p>One more product circles the market: the air-gap pad, a raised continuous cavity sitting under the backing. It appears in benchmark discussions without an independent engineering caliber behind it, so it stays a qualitative mention here rather than a spec claim.<\/p>\n<h2 id=\"where-earns-place\">Where a Drainage Layer Earns Its Place<\/h2>\n<p>Components do not solve every site, and a drainage layer earns its place only where something constrains water inside the base. Over permeable soil a graded base already owns a downward exit, so the case for artificial grass drainage tiles has to be argued from the constraint, not from the catalogue. Where water cannot leave downward, a cavity gives it a lateral route instead.<\/p>\n<p>The constraint test works in both directions. Where water leaves freely downward, extra layers mostly add cost and interfaces. Where it cannot leave, even a modest cavity with a real outlet outperforms a deeper bed of the wrong material. Site history tells you which world you are in: standing water after ordinary rain, slow-drying surfaces and stained edges are the record of a base that never lets go.<\/p>\n<ul>\n<li>Impervious hard surfaces: on concrete or hardened ground water can only travel laterally, and a cavity turns the under-backing pond into a path toward the outlet.<\/li>\n<li>Roofs and terraces: the layer doubles as membrane protection and load relief, where loose gravel loses on both counts.<\/li>\n<li>Heavy clay or low-permeability subgrade: infiltration is so slow the graded base fills and stops, while cavity plus outlet converts a vertical problem into a lateral one.<\/li>\n<li>Pet high-traffic zones: liquid has to pass and not stay overnight, and the air gap gives flush water a route out.<\/li>\n<\/ul>\n<p>Hard surfaces deserve the longest look, because they are where the interface trap from the opening section bites hardest. We keep the full concrete-patio story on its own page: see <a href=\"https:\/\/www.relyirgrass.com\/install-artificial-turf-on-concrete-diy\/\">the full concrete-patio scenario map, from slab assessment to edge outlets<\/a>. The mechanics here explain why the layer matters there; that page walks the slab itself.<\/p>\n<div class=\"callout callout-warning\">\n<p><strong>Before any rooftop install.<\/strong> Run the triple check: never block the roof&#8217;s existing drains, protect the waterproofing membrane, and choose the layer within the deck&#8217;s load limits. A wrong choice at this height is a structural problem, not a turf problem.<\/p>\n<\/div>\n<h2 id=\"water-path-chain\">The Water Path Is a Chain: Perforations, Void, Outlet<\/h2>\n<p>Put the component back into the path and the systems view appears. Surface perforations come first: some backings are heat-welded and punched through across the roll, while others carry glue only on the tufted areas so the space between tufts stays open. Both are how a permeable backing gets made, and the backing is where the water path through artificial grass drainage tiles begins. Below the backing sits the cavity or void layer, then continuous lateral conveyance on grade, then the outlet. Road-engineering practice is blunt about that last link: without an edge collection channel and an outfall pipe there is no positive drainage, per FHWA guidance on pavement base drainage.<\/p>\n<p>Our side of the chain is the carpet. Our backings are PP, PP+non-woven or PP+Grid cloth with PU optional, and perforating is a standing step on our 8-step production line. Factory data guarantees link one and nothing more, because matching the layer and the outlet is project-side work between you and your installer. When you shortlist <a href=\"https:\/\/www.relyirgrass.com\/residential-artificial-grass\/\">residential turf rolls matched to the component layer beneath<\/a>, review a sample against the actual void and grade, not against a datasheet. The roll, the cavity and the outlet should be read together before anyone commits.<\/p>\n<p>Read the chain as three questions. Which link does this component actually serve? What does the next link demand from it in grade, capacity or an open outlet? And who owns the outlet, because a discharge point nobody maintains quietly cancels every upstream spec. A roll that puddles on a bad layer is not a defective roll; it is a chain that was never read end to end.<\/p>\n<div class=\"cta-box\" style=\"background-color:#1a2b3c;border-radius:6px;padding:30px;margin:35px 0\">\n<h3 style=\"color:#ffffff;margin-top:0\">Is Your Roll Matched to the Layer Beneath?<\/h3>\n<p style=\"color:#ffffff\">Residential turf rolls configured to work with your drainage layer: perforated backing, widths that cut seams, samples sent first.<\/p>\n<p style=\"margin-bottom:0\"><a href=\"https:\/\/www.relyirgrass.com\/residential-artificial-grass\/\" style=\"display:inline-block;background-color:#1a5c2e;color:#ffffff;padding:12px 24px;border-radius:4px;text-decoration:none;font-weight:600\">View Residential Artificial Grass<\/a><\/p>\n<\/div>\n<h2 id=\"fitting-continuity\">Fitting the Layer In: Continuity Beats Thickness<\/h2>\n<p>Installation failures in this layer are continuity failures, not thickness failures. Laps get broken, grade gets reversed, outlets get blocked, and no extra depth fixes any of the three. That is the lens for fitting artificial grass drainage tiles: continuity beats thickness every time the two compete.<\/p>\n<p>Three craft points carry most of the weight. Lap direction follows the water flow, and geotextile laps of at least 18 inches keep the filter continuous. The same Oregon State guidance calls for 6-inch base lifts and no vibratory compaction on the rock. Grade continuity has to hold across both the layer and the base beneath it, so water never meets an uphill surprise. And the outlet plus edge condition get confirmed before the layer goes down, not after the first storm.<\/p>\n<table>\n<thead>\n<tr>\n<th>Component<\/th>\n<th>How it conducts water<\/th>\n<th>Critical installation requirement<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Dimpled sheets and geonets<\/td>\n<td>In-plane conduction, read against the ASTM D4716 caliber<\/td>\n<td>Sensitive to normal stress, since overburden changes capacity; separation or filter layer against fines, per FHWA and Iowa State guidance<\/td>\n<\/tr>\n<tr>\n<td>Drainage cells<\/td>\n<td>Structured void, water in vertically and out laterally<\/td>\n<td>Depends on gravity grade, with the NTA build running near a 0.8% incline; outlet discharge capacity matched to the cell<\/td>\n<\/tr>\n<tr>\n<td>Grass grids<\/td>\n<td>Infiltration through the infill inside the framework<\/td>\n<td>Depends on fill permeability rather than grade; wash the fill stone in place so dust never clogs the voids<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Air-gap pads carry no independent engineering caliber, so they stay out of the table on principle. Treat them as a qualitative option to verify on samples rather than a spec line to compare.<\/p>\n<p>The three rows read differently, which is the point: a universal installation method for this layer does not exist. Acceptance picks its checks by component class, and the table above is that checklist in miniature.<\/p>\n<figure>\n<img decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-roof-installation-drainage-mat-terrace.jpg\" alt=\"Rooftop artificial turf installation with grass rolls staged over an interlocking drainage layer\" width=\"1120\" height=\"680\" class=\"wp-image-2554\" data-img-slot=\"3\" loading=\"lazy\" srcset=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-roof-installation-drainage-mat-terrace.jpg 1120w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-roof-installation-drainage-mat-terrace-300x182.jpg 300w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-roof-installation-drainage-mat-terrace-1024x622.jpg 1024w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-roof-installation-drainage-mat-terrace-768x466.jpg 768w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-roof-installation-drainage-mat-terrace-18x12.jpg 18w\" sizes=\"auto, (max-width: 1120px) 100vw, 1120px\" \/><figcaption>Continuity is the craft: laps follow the water, grade never reverses, and the outlet is proven before cover.<\/figcaption><\/figure>\n<h2 id=\"design-rain\">Design to the Rain, Not to the Brochure<\/h2>\n<p>Selection closes on the design rainfall event, not on the boldest brochure number. Most engineered fields are designed to the 1-in-10-year annual rain event with a 10 or 20-minute duration, per the NTA guide. Moving to a 1-in-25-year event visibly raises the engineering cost. That is the frame artificial grass drainage tiles deserve: capacity argued against a rain, in writing. The failed 10 mm cell from earlier is what happens when spec and rain have no logical link between them.<\/p>\n<p>Take the same discipline to the supplier conversation. Ask which test caliber the datasheet number comes from, index or performance, before comparing anything. Ask how the design event and the outlet capacity correspond, because the cell only drains as fast as the pipe downstream allows. Ask for the layer-to-perforation coordination note so the backing and the cavity agree on who moves water where. Gradation and compaction of the base itself are a materials decision with their own page: <a href=\"https:\/\/www.relyirgrass.com\/why-base-materials-matter-for-artificial-turf\/\">how gradation and compaction decide what the layer beneath must handle<\/a>.<\/p>\n<p>On our side, turf rolls are configured per scenario for density, height and backing composition, and the 5m sports width runs nearly seam-free across a standard field. Rolls come in 2m, 4m and 5m widths by 25m long, with tailor-made sizes available on request. The surface link is the one we can confirm on samples; the layer link is yours to close with the three questions above.<\/p>\n<div class=\"callout callout-note\">\n<p><strong>The system beats the part.<\/strong> A component is one link of the water path, not the path itself. The best drainage sheet cannot save a design with no outlet, and the cheapest quote usually trims the outlet and the filter layer first.<\/p>\n<\/div>\n<p><!-- relyirgate:C1 --><\/p>\n<h2 id=\"faq\">Frequently Asked Questions<\/h2>\n<div class=\"faq-card\">\n<h3>Do artificial grass drainage tiles replace a gravel sub-base?<\/h3>\n<p>No, not one for one. Over permeable soil a graded base has its own downward exit, so the two serve different sites. Hard surfaces need cavity-class components, and the test is always what constrains water inside the base.<\/p>\n<\/div>\n<div class=\"faq-card\">\n<h3>What is ASTM D4716 and why does it matter for drainage sheets?<\/h3>\n<p>It is the constant-head, variable-normal-stress test for in-plane flow and hydraulic transmissivity of geosynthetics. Index and performance numbers come from different calibers and are not comparable, so ask the method before comparing sheets.<\/p>\n<\/div>\n<div class=\"faq-card\">\n<h3>How thick should a drainage cell be?<\/h3>\n<p>Sports-field practice centres on cells of about 30 mm, matched to the design rain event. A 10 mm cell once failed on water volume. Without site rain data there is no universal value.<\/p>\n<\/div>\n<div class=\"faq-card\">\n<h3>Why does water still pool if I added a drainage layer?<\/h3>\n<p>Check three links: outlet capacity, grade continuity and the state of the backing perforations. Any broken link pools the field, because a layer only moves water that the rest of the path lets leave.<\/p>\n<\/div>\n<div class=\"faq-card\">\n<h3>Do drainage layers help with pet odor?<\/h3>\n<p>Yes, indirectly. An air cavity speeds drying and gives flush water a route out, and standing water is the root cause of odor under turf.<\/p>\n<\/div>\n<p><script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n {\"@type\":\"Question\",\"name\":\"Do artificial grass drainage tiles replace a gravel sub-base?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, not one for one. Over permeable soil a graded base has its own downward exit, so the two serve different sites. Hard surfaces need cavity-class components, and the test is always what constrains water inside the base.\"}},\n {\"@type\":\"Question\",\"name\":\"What is ASTM D4716 and why does it matter for drainage sheets?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is the constant-head, variable-normal-stress test for in-plane flow and hydraulic transmissivity of geosynthetics. Index and performance numbers come from different calibers and are not comparable, so ask the method before comparing sheets.\"}},\n {\"@type\":\"Question\",\"name\":\"How thick should a drainage cell be?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Sports-field practice centres on cells of about 30 mm, matched to the design rain event. A 10 mm cell once failed on water volume. Without site rain data there is no universal value.\"}},\n {\"@type\":\"Question\",\"name\":\"Why does water still pool if I added a drainage layer?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Check three links: outlet capacity, grade continuity and the state of the backing perforations. Any broken link pools the field, because a layer only moves water that the rest of the path lets leave.\"}},\n {\"@type\":\"Question\",\"name\":\"Do drainage layers help with pet odor?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, indirectly. An air cavity speeds drying and gives flush water a route out, and standing water is the root cause of odor under turf.\"}}\n ]\n}<\/script><\/p>\n<p><script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"Article\",\"headline\":\"Artificial Grass Drainage Tiles: How Sub-Base Drainage Works\",\"description\":\"How drainage tiles, cells and mats work under artificial grass: base mechanics, component families and water-path continuity.\",\"datePublished\":\"2026-10-14\",\"inLanguage\":\"en\",\"articleSection\":\"Installation and Maintenance\",\"about\":[{\"@type\":\"Thing\",\"name\":\"artificial grass drainage tiles\"},{\"@type\":\"Thing\",\"name\":\"sub-base drainage\"},{\"@type\":\"Thing\",\"name\":\"drainage cell\"}]}<\/script><\/p>\n<p><script type=\"application\/ld+json\">\n{\"definition\":\"Artificial grass drainage tiles are perforated turf rolls plus the component layers beneath them; what decides drain-down is base gravity mechanics, the three component families (dimpled sheets and geonets, drainage cells, grass grids) and the continuity of the water path from perforation to outlet.\",\"data_statements\":[\"Water crosses the backing through perforations, falls into a cavity or void layer, moves laterally on grade and leaves through an outlet; any broken link stops the path.\",\"Graded aggregate in the free-draining sports-field scheme carries roughly 40% void space, with structural depth sized for storage and slow release, per the NTA Smart Guide.\",\"ASTM D4716 measures in-plane flow per unit width and hydraulic transmissivity of geosynthetics at constant head under varying normal stress; index and performance calibers are not interchangeable.\",\"Drainage cells in sports builds run about 30 mm thick, drain by gravity near a 0.8% incline, and sizing must match the design rain event, mostly the 1-in-10-year annual event with a 10 or 20-minute duration.\",\"Highway engineering targets, such as draining 50% of drainable water in 1 to 2 hours with a 2% minimum cross slope, are road-engineering acceptance calibers rather than turf-universal values.\",\"Geotextile laps of at least 18 inches, 6-inch base lifts and no vibratory compaction keep the filter and voids continuous, per Oregon State guidance.\",\"Backing porosity comes two ways: heat-welded punching across the roll, or glue applied only on tufted areas so the space between tufts stays open.\"],\"qa_concise\":[\"Do drainage tiles replace a gravel sub-base? No; over permeable soil the graded base already drains downward, while hard surfaces need cavity-class components.\",\"What decides whether a drainage layer works? The chain: perforations, the void they discharge into, continuous grade and an outlet with real capacity.\",\"How are drainage cells sized? To the design rain event, with sports-field practice centred near 30 mm; a 10 mm cell once failed on volume mismatch.\"]}<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Die meisten Drainagebeschwerden, die wir h\u00f6ren, beginnen nicht mit dem Kunstrasen. Ein Monteur hebt nach einem Sturm eine Ecke an und stellt fest, dass der Kunstrasen an der Oberfl\u00e4che perfekt abflie\u00dft, w\u00e4hrend Wasser an der Grenzfl\u00e4che zwischen Unterlage und Untergrund eingeschlossen ist. Die Rolle wurde gebeten, Wasser durchzulassen \u2013 und das tat sie. Die Schicht darunter wurde nie gebeten, das Wasser zu tragen \u2026 <a title=\"Wie die Drainage unter Kunstrasen wirklich funktioniert\" class=\"read-more\" href=\"https:\/\/www.relyirgrass.com\/de\/artificial-grass-drainage-tiles-sub-base-drainage-wo\/\" aria-label=\"Mehr Informationen \u00fcber Wie Drainage unter Kunstrasen wirklich funktioniert\">Weiterlesen<\/a><\/p>","protected":false},"author":2,"featured_media":5947,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"Artificial Grass Drainage Tiles: Sub-Base Guide 2026","rank_math_description":"Base gravity mechanics, three component families, the water path as a chain and the continuity rules that make a drainage layer work.","rank_math_focus_keyword":"artificial grass drainage tiles","rank_math_robots":"","rank_math_canonical_url":"","rank_math_facebook_title":"","rank_math_facebook_description":"","rank_math_twitter_title":"","rank_math_twitter_description":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","_yoast_wpseo_focuskw":"","_yoast_wpseo_canonical":"","_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_meta-robots-nofollow":"","_yoast_wpseo_opengraph-title":"","_yoast_wpseo_opengraph-description":"","_yoast_wpseo_twitter-title":"","_yoast_wpseo_twitter-description":"","_aioseo_title":"","_aioseo_description":"","_aioseo_keywords":"","_aioseo_robots_default":"","_aioseo_robots_noindex":"","_aioseo_og_title":"","_aioseo_og_description":"","_aioseo_twitter_title":"","_aioseo_twitter_description":"","aiosp_title":"","aiosp_description":"","aiosp_keywords":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_analysis_target_kw":"","_seopress_robots_canonical":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_genesis_title":"","_genesis_description":"","_genesis_canonical":"","_genesis_noindex":"","_genesis_nofollow":"","slim_seo":"","footnotes":""},"categories":[30],"tags":[],"class_list":["post-5952","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-installation-maintenance"],"_links":{"self":[{"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/posts\/5952","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/comments?post=5952"}],"version-history":[{"count":1,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/posts\/5952\/revisions"}],"predecessor-version":[{"id":6715,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/posts\/5952\/revisions\/6715"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/media\/5947"}],"wp:attachment":[{"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/media?parent=5952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/categories?post=5952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/tags?post=5952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}