{"id":1832,"date":"2026-06-25T19:46:03","date_gmt":"2026-06-25T19:46:03","guid":{"rendered":"https:\/\/www.relyirgrass.com\/why-base-materials-matter-for-artificial-turf\/"},"modified":"2026-09-19T02:31:46","modified_gmt":"2026-09-19T02:31:46","slug":"why-base-materials-matter-for-artificial-turf","status":"publish","type":"post","link":"https:\/\/www.relyirgrass.com\/de\/why-base-materials-matter-for-artificial-turf\/","title":{"rendered":"Warum Basismaterialien f\u00fcr Kunstrasen wichtig sind"},"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; }\nul { margin-bottom: 28px; padding-left: 20px; list-style-type: disc; }\nli { margin-bottom: 10px; line-height: 1.6; }\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; }\nfigcaption { text-align: center; font-style: italic; }\n<\/style>\n<p><!-- meta_title: Why Base Materials Matter for Artificial Turf --><br \/>\n<!-- meta_description: Why base materials matter: how to specify gradation, compaction, depth and drainage fall, plus the checks to run before turf rolls land. --><\/p>\n<p>A contractor emails us photos eight weeks after handover: a ripple across the middle of a lawn and water sitting at one corner. The roll performed exactly as specified. The layer under it moved, and the surface copied every dip.<\/p>\n<p>Green yarn hides a weak layer for weeks, which is why base materials matter more than most specification sheets admit. We build rolls for contractors, distributors and landscape buyers, and the same three failures reach our bench again and again: wrong gradation, thin compaction, no verified fall.<\/p>\n<h2 id=\"what-base-does-under-turf\">What the Base Does Under a Turf Roll<\/h2>\n<p>A tidy artificial turf installation starts with a layer nobody photographs. That layer carries load, passes water downward, resists settlement and holds a plane for seams to sit flat against.<\/p>\n<p>Stated another way, why base materials matter is not philosophy. A base that drains, locks and stays level buys years of service from the carpet above. One that fails any of those three sends its defect pattern upward within a season.<\/p>\n<div class=\"wp-block-image\">\n<figure><img decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/synthetic-turf-sports-fields-slot3.webp\" alt=\"Aerial view of a full-size marked pitch with an even striped surface\" class=\"wp-image-1196\" width=\"1200\" height=\"675\" loading=\"lazy\" srcset=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/synthetic-turf-sports-fields-slot3.webp 1200w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/synthetic-turf-sports-fields-slot3-300x169.webp 300w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/synthetic-turf-sports-fields-slot3-1024x576.webp 1024w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/synthetic-turf-sports-fields-slot3-768x432.webp 768w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/synthetic-turf-sports-fields-slot3-18x10.webp 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>A marked pitch seen from above, even from touchline to touchline<\/figcaption><\/figure>\n<\/div>\n<p>Buyers who write those three jobs into a subcontract document spend far less time arguing about blame later. Measurements replace adjectives, and the conversation moves from opinion to evidence.<\/p>\n<h2 id=\"choosing-aggregate-base-materials\">Choosing Aggregate Base Materials That Hold Shape<\/h2>\n<p>Start from particle shape, not from the cheapest local ticket. Angular particles interlock under load; rounded ones roll. Most yards stock some version of 3\/4 inch minus crushed stone or Class II road base, and those two names cover the majority of jobs.<\/p>\n<table>\n<thead>\n<tr>\n<th>Material<\/th>\n<th>What it gives<\/th>\n<th>Where it fits<\/th>\n<th>Watch out<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Crushed stone with fines<\/td>\n<td>Interlock plus high permeability<\/td>\n<td>Default for lawns, commercial areas and fields<\/td>\n<td>Needs thin lifts and moisture to reach density<\/td>\n<\/tr>\n<tr>\n<td>Class II road base<\/td>\n<td>Predictable gradation batch to batch<\/td>\n<td>Municipal and contractor bids<\/td>\n<td>Confirm the regional equivalent name<\/td>\n<\/tr>\n<tr>\n<td>Decomposed granite<\/td>\n<td>Smooth finish, tight surface<\/td>\n<td>Dry regions and final fine grading<\/td>\n<td>Holds moisture in wet climates<\/td>\n<\/tr>\n<tr>\n<td>Coarse sand<\/td>\n<td>A leveling pass only<\/td>\n<td>Top screed under the carpet<\/td>\n<td>Never used as the structural layer<\/td>\n<\/tr>\n<tr>\n<td>Recycled concrete aggregate<\/td>\n<td>Lower embodied impact<\/td>\n<td>Large commercial areas<\/td>\n<td>Must arrive clean and well graded<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>In commercial artificial turf installations, traffic decides the material before drainage does. Rounded stone cannot lock, so pea gravel belongs inside French drains and decorative borders rather than under a wearing surface.<\/p>\n<div class=\"wp-block-image\">\n<figure><img decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/choose-artificial-turf-padel-stadium-slot4.webp\" alt=\"Fine grit and small stones raked into a levelled base course\" class=\"wp-image-1397\" width=\"1200\" height=\"800\" loading=\"lazy\" srcset=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/choose-artificial-turf-padel-stadium-slot4.webp 1200w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/choose-artificial-turf-padel-stadium-slot4-300x200.webp 300w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/choose-artificial-turf-padel-stadium-slot4-1024x683.webp 1024w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/choose-artificial-turf-padel-stadium-slot4-768x512.webp 768w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/choose-artificial-turf-padel-stadium-slot4-18x12.webp 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>Fine grit and small stones raked into a levelled layer<\/figcaption><\/figure>\n<\/div>\n<p>Recycled supply works when it is clean. Wire fragments, oversize chunks and dust-heavy loads are all rejection criteria you can put on the delivery note before the first truck arrives.<\/p>\n<h2 id=\"specifying-gradation-and-compaction\">Specifying Gradation, Fines and Compaction Targets<\/h2>\n<p>Put the numbers in the subcontract instead of leaving them to site habit. Aggregate around 10\u201320 mm with fines is widely cited, and installers also quote a 70:30 balance of solid mass to fines where free drainage is the priority.<\/p>\n<p>Placement discipline matters as much as the material itself. Lifts thicker than the compactor can work leave a hard skin over loose fill. The evidence arrives later, with furniture, footfall or a service vehicle.<\/p>\n<ul>\n<li>Set targets on paper: about 95 percent of maximum dry density for landscape work, 95 to 98 percent Modified Proctor on full field builds.<\/li>\n<li>Cap each pass: lifts no thicker than 2 inches on landscapes, typically 4 to 6 inches on heavy field sections.<\/li>\n<li>Specify plant as vibratory plate compactors, 200 pound class or better, rather than leaving the size to whoever turns up.<\/li>\n<li>Screed the finish at 1\/2 inch or less of fine material, then verify the plane before anything is unrolled.<\/li>\n<\/ul>\n<div class=\"wp-block-image\">\n<figure><img decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/turf-infield-cost-the-hidden-costs-that-surprise-your-budget-feature.webp\" alt=\"Overhead view of even artificial turf meeting a painted corner line\" class=\"wp-image-1045\" width=\"1200\" height=\"800\" loading=\"lazy\" srcset=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/turf-infield-cost-the-hidden-costs-that-surprise-your-budget-feature.webp 1200w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/turf-infield-cost-the-hidden-costs-that-surprise-your-budget-feature-300x200.webp 300w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/turf-infield-cost-the-hidden-costs-that-surprise-your-budget-feature-1024x683.webp 1024w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/turf-infield-cost-the-hidden-costs-that-surprise-your-budget-feature-768x512.webp 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>Even artificial turf meeting a painted corner line<\/figcaption><\/figure>\n<\/div>\n<p>Compaction is the step most likely to be trimmed when the schedule tightens, and it is also the step whose absence costs the most later. Dampen lightly, work in passes, and record it.<\/p>\n<h2 id=\"calculating-base-depth-quantities\">Calculating Base Depth and Material Quantities<\/h2>\n<p>Depth follows soil and traffic, then turns into a number you can order against. The bands below are published practice; where local geotechnical advice disagrees, local advice wins.<\/p>\n<table>\n<thead>\n<tr>\n<th>Scenario<\/th>\n<th>Compacted depth<\/th>\n<th>Note for the take-off<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Stable soil, light foot traffic<\/td>\n<td>3\u20134 inches (8\u201310 cm)<\/td>\n<td>Default residential specification<\/td>\n<\/tr>\n<tr>\n<td>Clay soil, pets or heavier use<\/td>\n<td>4\u20136 inches<\/td>\n<td>Add separation fabric over a weak subgrade<\/td>\n<\/tr>\n<tr>\n<td>Pet areas with frequent rinse-down<\/td>\n<td>4\u20135 inches<\/td>\n<td>Steeper fall at 1.5\u20132 percent<\/td>\n<\/tr>\n<tr>\n<td>Play areas and sports build-ups<\/td>\n<td>15\u201320 cm (6 inches or more)<\/td>\n<td>Deeper section plus any required shock layer<\/td>\n<\/tr>\n<tr>\n<td>Rooftop or balcony, light build-up<\/td>\n<td>3\u20135 cm<\/td>\n<td>Only where the deck carries the load<\/td>\n<\/tr>\n<tr>\n<td>Freeze-thaw regions<\/td>\n<td>Add 1\u20132 inches<\/td>\n<td>Drainage takes priority over depth alone<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Order loose volume rather than compacted volume. Area multiplied by thickness gives the loose figure, then add 10\u201315 percent for compaction and grading losses, and keep 5\u201310 percent extra length and width for trimming and seam allowance.<\/p>\n<p>A quick check keeps everyone honest: 100 square metres at 10 cm of finished base needs 10 cubic metres of material before losses. Ask for that quantity in writing before the last truck leaves site, not after. Budget reviews are another place where why base materials matter shows up, because depth drives tonnage.<\/p>\n<p>Roll planning runs on the same arithmetic, because wider rolls remove seams across open rectangles. Review our <a href=\"https:\/\/www.relyirgrass.com\/residential-artificial-grass\/\">residential roll options and layouts<\/a> before you fix dimensions.<\/p>\n<h2 id=\"setting-drainage-slope\">Setting Drainage Slope and Moving Water Away<\/h2>\n<p>Drainage faults in artificial turf installations almost always trace back to fall or to a low spot. Keep 1\u20132 percent running away from buildings, and never below 0.5 percent on any surface that carries regular foot traffic.<\/p>\n<p>Clay and existing low points need more than a surface grade. Separation fabric over the subgrade plus a drain layer tied to a real outlet is the standard answer; see our <a href=\"https:\/\/www.relyirgrass.com\/put-under-artificial-grass-for-drainage-complete-guide\/\">drainage build-ups for artificial grass<\/a> for layered alternatives.<\/p>\n<p>Perforation belongs to the same calculation. Athletic specifications commonly ask for polyurethane or latex backing delivering at least 30 gallons\/min\/sq yd, so compare <a href=\"https:\/\/www.relyirgrass.com\/latex-backed-pu-backed-artificial-grass\/\">backing options and perforation behaviour<\/a> against local rainfall before fixing the product.<\/p>\n<div class=\"wp-block-image\">\n<figure><img decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/specifying-turf-about-more-than-surface-appearance-backing-featured.webp\" alt=\"Close view of a dark mesh layer with an open grid structure\" class=\"wp-image-1652\" width=\"1200\" height=\"675\" loading=\"lazy\" srcset=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/specifying-turf-about-more-than-surface-appearance-backing-featured.webp 1200w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/specifying-turf-about-more-than-surface-appearance-backing-featured-300x169.webp 300w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/specifying-turf-about-more-than-surface-appearance-backing-featured-1024x576.webp 1024w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/specifying-turf-about-more-than-surface-appearance-backing-featured-768x432.webp 768w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/specifying-turf-about-more-than-surface-appearance-backing-featured-18x10.webp 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>An open grid structure in a dark mesh layer<\/figcaption><\/figure>\n<\/div>\n<p>Finish with practical checks: no ponding after a hose test, no reverse fall toward a threshold, and an identified discharge point that is not a neighbouring planted bed.<\/p>\n<h2 id=\"base-choices-and-roll-width\">Why Base Choices Shape Roll Width and Seams<\/h2>\n<p>Seams fail where the plane beneath them fails. Standard rolls arrive in 2 m, 4 m and 5 m widths at 25 m long. The wider the roll, the more it demands of the surface beneath it.<\/p>\n<p>Treat that as tolerance stacked on tolerance. A wide roll bridges a broad area in one piece, so one high spot becomes a ridge across the whole run. Narrower pieces let a crew work around local error, at the cost of more joins. Joins cost labour and material to lay and check; ridges cost the relationship that follows.<\/p>\n<p>That is the quiet reason why base materials matter to roll planning: tolerance below decides how wide a roll you can sensibly carry above it. Custom widths shift the arithmetic again by removing joins on awkward shapes, so check current <a href=\"https:\/\/www.relyirgrass.com\/artificial-grass-products\/\">roll widths and product formats<\/a> against your layout before ordering.<\/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;\">Base Failed Before Your Rolls Arrived?<\/h3>\n<p style=\"color:#ffffff;\">A soft base leaves ripples and puddles blamed on the turf. Factory-direct rolls are built to your stated pile, density and backing. Request a 20 by 20 cm sample.<\/p>\n<p><a href=\"https:\/\/www.relyirgrass.com\/artificial-grass-products\/artificial-grass-roll\/\" style=\"display:inline-block;background-color:#1a5c2e;color:#ffffff;padding:12px 24px;border-radius:4px;text-decoration:none;font-weight:600;\">View Turf Roll Range<\/a><\/p>\n<\/div>\n<h2 id=\"five-base-mistakes\">Five Base Mistakes Buyers Spot Too Late<\/h2>\n<p>These five account for most callbacks on artificial turf installations that reach us. Each one is cheap to prevent on day one and expensive to open up once the carpet is down.<\/p>\n<h3>1. Rounded stone carrying structural load<\/h3>\n<p>Rounded particles roll under load and leave shallow dips that read as shade lines across the finished surface. Round gravel is fine inside drains and borders, never under a wearing layer.<\/p>\n<h3>2. Full depth placed in one pass<\/h3>\n<p>Compaction energy falls away fast with depth, so one thick layer gives a hard skin over loose fill. Lifts are not optional, whatever the programme pressure says.<\/p>\n<h3>3. Organics left under the aggregate<\/h3>\n<p>Roots, turf and topsoil break down and leave voids that settle for years. Strip them, proof-roll the subgrade and repair soft spots before the first load lands.<\/p>\n<h3>4. Fall built towards the building<\/h3>\n<p>A reversed grade sends water to thresholds and keeps the carpet wet along the edge, which is where odour complaints usually begin. Check slope direction before compaction starts.<\/p>\n<h3>5. No trim allowance in the take-off<\/h3>\n<p>Short material forces a second delivery and an argument about batch matching. Carry 5\u201310 percent extra length and width as a standing rule in every order.<\/p>\n<p>Wrinkles are often this same story retold, with movement below and waves above. Our <a href=\"https:\/\/www.relyirgrass.com\/why-artificial-grass-wrinkles-how-to-prevent-it\/\">note on why wrinkles form after laying<\/a> covers the mechanism.<\/p>\n<h2 id=\"accepting-finished-base\">Accepting a Finished Base Before Rolls Land<\/h2>\n<p>Acceptance is a short list, and one site visit covers it: straightedge, spirit level, hose, camera. Photograph everything, because the agreement you want rests on evidence rather than opinion. Every artificial turf installation gets signed off somewhere; do it here, before material is unrolled onto someone else&#8217;s judgement.<\/p>\n<h3>Density evidence first<\/h3>\n<p>Ask for a density result rather than a verbal assurance, with published practice around 95 percent of maximum dry density for landscape work. Inconsistent density shows up later as ruts following regular traffic lines.<\/p>\n<h3>Plane and tolerance<\/h3>\n<p>Run a straightedge across the finished course and allow no more than 1\/4 inch of deviation. Levelled field work is commonly specified to plus or minus 1\/4 inch over a 10-foot radius.<\/p>\n<h3>Fall and outlets<\/h3>\n<p>Confirm the direction of the fall and where the water actually goes. Any pool still standing ten minutes after the hose stops is a defect, not a damp patch waiting to dry.<\/p>\n<h3>Cleanliness and edge restraint<\/h3>\n<p>Fines should not pump under load, and the perimeter must be contained. An unrestrained base creeps outward, taking edge fixings and seam alignment along with it.<\/p>\n<p>By handover time, why base materials matter is obvious to everyone standing on site: whatever sits above reproduces what lies below. Better to reopen the base now than to unroll turf over it.<\/p>\n<p><!-- relyirgate:C1 --><\/p>\n<h2 id=\"frequently-asked-questions\">Frequently Asked Questions<\/h2>\n<div class=\"faq-card\" style=\"background:#f9f9f9;border-left:4px solid #1a5c2e;border-radius:4px;padding:25px;margin-bottom:18px;\">\n<h3 style=\"color:#1a5c2e;margin-top:0;\">Which base material suits most turf jobs?<\/h3>\n<p>Angular 3\/4 inch minus crushed stone with fines, often sold as road base. It locks under compaction while still passing water, and most yards stock it.<\/p>\n<\/div>\n<div class=\"faq-card\" style=\"background:#f9f9f9;border-left:4px solid #1a5c2e;border-radius:4px;padding:25px;margin-bottom:18px;\">\n<h3 style=\"color:#1a5c2e;margin-top:0;\">How deep should the base be?<\/h3>\n<p>Most lawns need 3\u20134 inches of compacted base, while clay, pet areas or sports build-ups run 4\u20136 inches or more. Depth follows soil and traffic.<\/p>\n<\/div>\n<div class=\"faq-card\" style=\"background:#f9f9f9;border-left:4px solid #1a5c2e;border-radius:4px;padding:25px;margin-bottom:18px;\">\n<h3 style=\"color:#1a5c2e;margin-top:0;\">Do I need a shock pad under landscape turf?<\/h3>\n<p>Only where safety or impact requirements call for one. Playgrounds and athletic builds add a pad; most decorative and residential lawns are specified without it.<\/p>\n<\/div>\n<div class=\"faq-card\" style=\"background:#f9f9f9;border-left:4px solid #1a5c2e;border-radius:4px;padding:25px;margin-bottom:18px;\">\n<h3 style=\"color:#1a5c2e;margin-top:0;\">Can turf go straight onto concrete?<\/h3>\n<p>It can, but you lose vertical drainage, so water has to travel sideways. Specify a drainage layer or dimpled mat and confirm where the water leaves.\n<\/p>\n<\/div>\n<div class=\"faq-card\" style=\"background:#f9f9f9;border-left:4px solid #1a5c2e;border-radius:4px;padding:25px;margin-bottom:18px;\">\n<h3 style=\"color:#1a5c2e;margin-top:0;\">How much extra material should I order?<\/h3>\n<p>Add 10\u201315 percent to the loose volume for compaction and grading losses, and keep 5\u201310 percent extra length and width for trimming and seams.<\/p>\n<\/div>\n<div class=\"faq-card\" style=\"background:#f9f9f9;border-left:4px solid #1a5c2e;border-radius:4px;padding:25px;margin-bottom:18px;\">\n<h3 style=\"color:#1a5c2e;margin-top:0;\">How do I test drainage before rolls are laid?<\/h3>\n<p>Run a hose over the finished base and watch where water travels. It should infiltrate and follow the fall, with nothing left standing once the hose stops.<\/p>\n<\/div>\n<p><script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"Article\",\"headline\":\"Why Base Materials Matter for Artificial Turf\",\"description\":\"Why base materials matter: how to specify gradation, compaction, depth and drainage fall, plus the checks to run before turf rolls land.\",\"author\":{\"@type\":\"Organization\",\"name\":\"Relyir Artificial Grass\"},\"publisher\":{\"@type\":\"Organization\",\"name\":\"Relyir Artificial Grass\"},\"datePublished\":\"2026-09-15\",\"dateModified\":\"2026-09-15\",\"mainEntityOfPage\":\"https:\/\/www.relyirgrass.com\/why-base-materials-matter-for-artificial-turf\/\"}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Which base material suits most turf jobs?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Angular 3\/4 inch minus crushed stone with fines, often sold as road base. It locks under compaction while still passing water, and most yards stock it.\"}},{\"@type\":\"Question\",\"name\":\"How deep should the base be?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most lawns need 3\u20134 inches of compacted base, while clay, pet areas or sports build-ups run 4\u20136 inches or more. Depth follows soil and traffic.\"}},{\"@type\":\"Question\",\"name\":\"Do I need a shock pad under landscape turf?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Only where safety or impact requirements call for one. Playgrounds and athletic builds add a pad; most decorative and residential lawns are specified without it.\"}},{\"@type\":\"Question\",\"name\":\"Can turf go straight onto concrete?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It can, but you lose vertical drainage, so water has to travel sideways. Specify a drainage layer or dimpled mat and confirm where the water leaves.\"}},{\"@type\":\"Question\",\"name\":\"How much extra material should I order?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Add 10\u201315 percent to the loose volume for compaction and grading losses, and keep 5\u201310 percent extra length and width for trimming and seams.\"}},{\"@type\":\"Question\",\"name\":\"How do I test drainage before rolls are laid?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Run a hose over the finished base and watch where water travels. It should infiltrate and follow the fall, with nothing left standing once the hose stops.\"}}]}\n<\/script><br \/>\n<script type=\"application\/ld+json\" id=\"evo301-geo-ai-block\">\n{\"definition\":\"Base materials matter for artificial turf because the compacted aggregate course carries traffic load, passes water downward, resists settlement and holds the plane that keeps seams flat; defects in that layer reproduce themselves in the carpet above within one season.\",\"data_statements\":[\"Angular 3\/4 inch minus crushed stone or Class II road base with fines is the common specification: the angular particle shape interlocks under compaction while the gradation still passes water.\",\"Typical compacted depth is 3\u20134 inches on stable soil with light traffic, 4\u20136 inches on clay, pet areas or heavier use, and 15\u201320 cm or more for play areas and sports build-ups.\",\"Compaction targets cited across sources are about 95 percent of maximum dry density for landscape work and 95 to 98 percent Modified Proctor for full field builds, achieved in thin lifts.\",\"Surface fall of 1\u20132 percent away from structures is standard practice, with 0.5 percent the minimum slope quoted for field surfaces.\",\"Order loose volume and add 10\u201315 percent for compaction and grading losses, then keep 5\u201310 percent extra length and width for trimming and seams.\",\"Acceptance uses a straightedge with no more than 1\/4 inch of deviation plus a hose test: water must infiltrate and follow the fall with nothing left standing.\",\"Rounded stone such as pea gravel does not interlock and should not serve as the structural or leveling layer under turf.\",\"Relyir supplies artificial grass rolls in 2 m, 4 m and 5 m widths at 25 m long with custom widths, custom pile height and density, and PP+Net or PU backing.\"],\"qa_concise\":[{\"q\":\"Why does the base decide artificial turf performance?\",\"a\":\"It carries load, drains water and holds the plane; any defect there shows through the carpet.\"},{\"q\":\"How thick should a turf base be?\",\"a\":\"Usually 3\u20134 inches on stable soil, 4\u20136 inches for clay, pets or heavy use, deeper for sports.\"},{\"q\":\"What checks come before laying rolls?\",\"a\":\"Density evidence, straightedge tolerance, verified fall and a hose test with no standing water.\"}]}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ein Auftragnehmer schickt uns acht Wochen nach \u00dcbergabe Fotos: eine Welligkeit in der Mitte eines Rasens und stehendes Wasser in einer Ecke. Die Bahn hat genau wie spezifiziert funktioniert. Die Schicht darunter hat sich bewegt, und die Oberfl\u00e4che hat jede Senkung mitgemacht. Gr\u00fcne Garne verdecken wochenlang eine schwache Schicht, weshalb Grundmaterialien wichtiger sind \u2026 <a title=\"Warum Basismaterialien f\u00fcr Kunstrasen wichtig sind\" class=\"read-more\" href=\"https:\/\/www.relyirgrass.com\/de\/why-base-materials-matter-for-artificial-turf\/\" aria-label=\"Mehr Informationen \u00fcber Warum Basismaterialien f\u00fcr Kunstrasen wichtig sind\">Weiterlesen<\/a><\/p>","protected":false},"author":2,"featured_media":1044,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"Why Base Materials Matter for Artificial Turf","rank_math_description":"Why base materials matter: how to specify gradation, compaction, depth and drainage fall, plus the base checks to run before turf rolls land.","rank_math_focus_keyword":"why base materials matter","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":[29],"tags":[],"class_list":["post-1832","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-buying-guide"],"_links":{"self":[{"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/posts\/1832","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=1832"}],"version-history":[{"count":2,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/posts\/1832\/revisions"}],"predecessor-version":[{"id":3282,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/posts\/1832\/revisions\/3282"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/media\/1044"}],"wp:attachment":[{"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/media?parent=1832"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/categories?post=1832"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.relyirgrass.com\/de\/wp-json\/wp\/v2\/tags?post=1832"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}