{"id":5094,"date":"2026-09-29T01:10:55","date_gmt":"2026-09-29T01:10:55","guid":{"rendered":"https:\/\/www.relyirgrass.com\/prepare-ground-for-artificial-grass\/"},"modified":"2026-10-30T15:10:58","modified_gmt":"2026-10-30T15:10:58","slug":"prepare-ground-for-artificial-grass","status":"publish","type":"post","link":"https:\/\/www.relyirgrass.com\/ar\/prepare-ground-for-artificial-grass\/","title":{"rendered":"\u062a\u062d\u0636\u064a\u0631 \u0627\u0644\u0623\u0631\u0636 \u0644\u0644\u0639\u0634\u0628 \u0627\u0644\u0635\u0646\u0627\u0639\u064a: \u062f\u0644\u064a\u0644 \u062e\u0637\u0648\u0629 \u0628\u062e\u0637\u0648\u0629"},"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; }\nfigcaption { text-align: center; font-style: italic; }\n.callout-note { border-left: 4px solid #1a5c2e; background: #f3f7f2; padding: 18px 22px; margin: 28px 0; border-radius: 4px; }\n.callout-warning { border-left: 4px solid #b8860b; background: #fdf7e8; padding: 18px 22px; margin: 28px 0; border-radius: 4px; }\n<\/style>\n<p>Crews who come back for replacement rolls after a failed first season tell the same story. The lawn has sunk in patches, puddles sit where water used to run off, and weeds push through the seams. The grass itself is almost never the failure point. The fault was decided months earlier, in the ground works &#8211; in an unaligned dig depth, compaction claimed but never proven, and a fall guessed instead of tested.<\/p>\n<p>We see the same pattern from the spec desk: the roll was made to spec, but the ground under it never met a checkable standard. So we run the build as an acceptance flow: seven stages, each ending in a verdict &#8211; a number hit or a test passed &#8211; before the next stage starts. That is how we prepare ground for artificial grass on soil sites: set the level, hit the number, prove the stage done.<\/p>\n<h2 id=\"survey-the-site-and-set-finished-levels\">Survey the Site and Set Finished Levels<\/h2>\n<p>Prepare ground for artificial grass by starting at the top, not the bottom: finished levels come before dig depth. Mark exactly where the new lawn meets patios, paths, steps and thresholds, because those fixed points decide the finished level the whole build-up has to land on. Per one UK groundwork specialist guide, never raise the ground over a damp-proof course or cover air bricks, and check for buried services before excavation or driving stakes.<\/p>\n<figure>\n<img decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/prepare-ground-for-artificial-grass-slot1-survey-stakes.webp\" data-img-slot=\"1\" width=\"1200\" height=\"675\" alt=\"Surveyor leveling instrument and marked stakes on a bare soil site\" class=\"wp-image-5084\" loading=\"lazy\" srcset=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/prepare-ground-for-artificial-grass-slot1-survey-stakes.webp 1200w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/prepare-ground-for-artificial-grass-slot1-survey-stakes-300x169.webp 300w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/prepare-ground-for-artificial-grass-slot1-survey-stakes-1024x576.webp 1024w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/prepare-ground-for-artificial-grass-slot1-survey-stakes-768x432.webp 768w, https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/prepare-ground-for-artificial-grass-slot1-survey-stakes-18x10.webp 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>Finished levels are agreed before the first spade goes in.<\/figcaption><\/figure>\n<p>Next, read the soil before you commit to a depth. Clay holds water and can swell or stay waterlogged for hours after rain, while sandy ground drains freely but shifts under load. The read decides how deep you dig and which drainage measures follow, so write it into the site notes before anything is ordered. One UK installer guide adds a simple rule: where soil is clay-heavy or prone to waterlogging, dig a bit deeper.<\/p>\n<p>Logistics belong in the survey too. A turf cutter strips the root mat at one precise, adjustable depth where spade digging runs shallow-deep-shallow. Waste is the hidden line item: per one installer DIY guide, a standard 40 sqm garden can fill a 4-yard skip, so plan the route before the crew arrives. Treat total dig depth as a budget of layers &#8211; grass roll, structural layer, laying course &#8211; with roll width and pile height made to spec. The <a href=\"https:\/\/www.relyirgrass.com\/artificial-grass-installation-prep\/\">full installation prep walkthrough that covers ordering and staging<\/a> picks up from there.<\/p>\n<h2 id=\"strip-topsoil-and-dig-to-the-right-depth\">Strip Topsoil and Dig to the Right Depth<\/h2>\n<p>Stripping is where specification discipline starts, and it rewards a clean machine pass over heroic shovel work. Mow the existing grass as low as the machine allows first; the root mat then lifts in one readable layer instead of a torn mix of blades and soil.<\/p>\n<figure>\n<img decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-turf-site-grading-excavation.webp\" data-img-slot=\"2\" width=\"1200\" height=\"675\" alt=\"Foot pressing a spade into garden soil to strip the surface\" class=\"wp-image-682\" loading=\"lazy\"><figcaption>Clean removal beats deep guessing: roots and debris leave the site.<\/figcaption><\/figure>\n<h3>Remove the Existing Lawn Cleanly<\/h3>\n<p>Per one manufacturer install guide, mow low, then remove 50-100 mm of topsoil with a sod cutter or spade, raking out roots, rocks and debris as you go. A hired turf cutter wins for the same reason as in the survey: it slices the root network at one precise, adjustable depth. Hand digging runs shallow-deep-shallow and leaves a ragged horizon that complicates every later depth check. Depth is a design decision, not a fixed rule &#8211; never bury unsuitable material to save a skip load.<\/p>\n<h3>How Deep to Dig for Artificial Grass<\/h3>\n<p>Published depth figures disagree until you read them as one spread. Total dig depth runs about 75-100 mm per UK installer guides, which one manufacturer install guide phrases as removing 50-100 mm of topsoil. A US ground-prep guide calls for at least 4 inches, while thinner step-listicle guides quote 2-3 inch minimums that sit at the floor of the spread. The figure you land on to prepare ground for artificial grass is a design decision: ground needing drainage or remediation digs differently from stable ground. Work backwards from the finished level &#8211; pile height and roll build, then structural layer, then laying course &#8211; and the sum is the spade line.<\/p>\n<h3>Clear Roots, Rocks and Soft Spots<\/h3>\n<p>Remove all organic matter &#8211; grass, roots and weeds &#8211; because material left behind decomposes and causes uneven settling, lumps and odors. That is the direct answer to whether you can lay artificial grass straight onto soil: you cannot, because soil retains water, stays uneven and lets weeds through. Walk the area after stripping, dig out every soft spot, and refill with compacted crushed stone rather than hoping it firms up on its own. Per one installer mistakes guide, organic material beneath the turf decomposes and creates instability and irregularities &#8211; the reason the clearing standard is absolute.<\/p>\n<h2 id=\"build-fall-and-drainage-into-the-sub-grade\">Build Fall and Drainage Into the Sub-Grade<\/h2>\n<p>Three published expressions describe the same order of slope. Per one US ground-prep guide and one manufacturer install guide, the sub-base needs a slight slope of around 1-2% so water runs off naturally. One UK base-materials guide builds the binding layer at roughly 1 cm per metre of fall away from the house. Per one installer DIY guide, the excavation gradient is about 1 in 100. Those are one number in three clothes: 1-2% equals 10-20 mm of fall per metre of run.<\/p>\n<p>Direction matters as much as the figure itself. The surface should slope slightly away from buildings, carrying water from the house toward a drainage point instead of letting it sit against walls or thresholds. The right fall in the wrong direction still fails &#8211; a mistake that lets crews prepare ground for artificial grass to the correct number and still bank standing water.<\/p>\n<div class=\"callout callout-warning\"><strong>More stone is not a drainage fix.<\/strong> Per one UK groundwork specialist guide, a material&#8217;s name alone does not make a build-up free-draining: Type 1 MOT belongs in stable installations, a pile of mixed rubble is never a drainage layer, and adding more stone does not cure waterlogged ground.<\/div>\n<p>Prove the fall before turf day with a water test. Spray water across the prepared sub-grade and watch it flow. Per one US installer mistakes guide, spots where water pools need adjustment before laying &#8211; finding the problem after installation means costly tear-out. Heavy clay that holds surface water for hours needs a soakaway or land drains first, per one installer DIY guide. In heavy-rainfall areas, one US layers guide adds a perforated pipe beneath the sub-base.<\/p>\n<p>Where the ground itself fights the gradient, the build-up has to do more of the work; <a href=\"https:\/\/www.relyirgrass.com\/artificial-grass-drainage-bases\/\">drainage bases and perforation options<\/a> are compared in our dedicated drainage guide.<\/p>\n<p>Separation comes before drainage on soft ground. Laid beneath the base layer, a geotextile provides the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Geotextile\" target=\"_blank\" rel=\"noopener\">separation function that stops soil mixing into the aggregate<\/a> while water still passes through. One geotextile vendor guide specifies it where soil drains poorly; Wikipedia&#8217;s geotextile overview lists separation, filtration, reinforcement and drainage as the fabric&#8217;s core functions.<\/p>\n<h2 id=\"choose-the-sub-base-material-that-fits-the-ground\">Choose the Sub-Base Material That Fits the Ground<\/h2>\n<p>The structural layer carries the load; the laying course gives the turf its smooth bed. Both are chosen by ground condition and use, not by what is on the yard, and every figure below keeps its published source.<\/p>\n<h3>The Structural Layer: MOT Type 1 or Crushed Rock<\/h3>\n<p>Per one US ground-prep guide, a crushed aggregate base &#8211; often Type 1 MOT or similar &#8211; runs about 2-4 inches thick. Manufacturer and UK base-materials wording splits the same layer into 50-75 mm for most gardens and 75-100 mm for heavy use. The clearest published split, per one UK installation service page, is about 50 mm of primary sub-base under a 20-25 mm laying course. US builds substitute 3\/4-inch crushed stone or Class II Road Base per one US layers guide, and one geotextile vendor guide quotes 30-80 mm depending on soil and application. Per one installer mistakes guide, build the 50-75 mm of crushed stone in compacted layers.<\/p>\n<h3>The Laying Course: Granite Dust, Grano or Sharp Sand<\/h3>\n<p>Granite dust is the preferred levelling course at 10-15 mm per one manufacturer install guide, chosen for stability and drainage. One UK base-materials guide describes the same layer as around 25 mm of grit or grano dust, screeded flat with a straight timber edge. One UK installer guide adds an optional 10 mm layer of sharp sand for a smoother surface, and one metric manufacturer guide quotes a 1-2 cm fine sand variant. Whichever you screed, laying-course materials are not automatic like-for-like substitutes &#8211; selection depends on the installation.<\/p>\n<h3>What Never Goes in the Hole<\/h3>\n<p>No sand and no topsoil as a base &#8211; both retain moisture and become unstable. Building sand is the classic mistake: it is too fine, holds water, turns to soft mush and lets the grass ripple. Sharp sand does not bind as a structural layer either, per one installer mistakes guide. Keep kiln-dried sand out of the finished build as well; per one UK installation service page it blocks the drainage holes in the backing and grows wind-blown seeds.<\/p>\n<table>\n<tr>\n<th>Use case<\/th>\n<th>Total dig depth<\/th>\n<th>Structural layer<\/th>\n<th>Laying course<\/th>\n<\/tr>\n<tr>\n<td>Light domestic on free-draining ground<\/td>\n<td>50 mm minimum (per one UK base-materials guide)<\/td>\n<td>50 mm compacted hardcore<\/td>\n<td>25 mm binding layer<\/td>\n<\/tr>\n<tr>\n<td>Standard garden<\/td>\n<td>About 75-100 mm (per one UK installer guide)<\/td>\n<td>50-75 mm Type 1 MOT (per one UK base-materials guide)<\/td>\n<td>20-25 mm granite dust or sharp sand (per one UK installation service page)<\/td>\n<\/tr>\n<tr>\n<td>Heavy use<\/td>\n<td>75-100 mm plus binding layer (per one UK base-materials guide)<\/td>\n<td>75-100 mm crushed rock (3-4 inches per one manufacturer install guide)<\/td>\n<td>20-25 mm as standard<\/td>\n<\/tr>\n<tr>\n<td>Clay-heavy or poorly draining ground<\/td>\n<td>Dig deeper &#8211; up to 6 inches (per one US layers guide)<\/td>\n<td>Sized to the soil read, compacted in layers<\/td>\n<td>As for the standard build<\/td>\n<\/tr>\n<\/table>\n<p>Whatever row your site matches, the arithmetic to prepare ground for artificial grass stays the same: total dig depth equals structural layer plus laying course.<\/p>\n<h2 id=\"compact-the-base-until-it-locks\">Compact the Base Until It Locks<\/h2>\n<p>Compaction turns loose stone into structure, and it is the stage crews most often under-run. Spread the sub-base evenly, then make several passes with a plate compactor over the entire area &#8211; per one US ground-prep guide, compaction effort directly affects appearance and lifespan.<\/p>\n<figure>\n<img decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/artificial-grass-drainage-bases-slot4.webp\" data-img-slot=\"3\" width=\"1200\" height=\"675\" alt=\"Yellow compaction rammer tamping a gravel and earth base\" class=\"wp-image-1162\" loading=\"lazy\"><figcaption>Compaction is proven underfoot, not assumed.<\/figcaption><\/figure>\n<p>Build the base up in layers rather than one dump. Per one US installer mistakes guide, the sub-base goes down in several layers each 1-2 inches deep, each compacted before the next is spread. Fill material is <a href=\"https:\/\/en.wikipedia.org\/wiki\/Soil_compaction\" target=\"_blank\" rel=\"noopener\">placed in layers called lifts<\/a>, as Wikipedia&#8217;s soil-compaction overview puts it, and every lift locks before the next goes on.<\/p>\n<p>Per one installer DIY guide, pass over the area at least three or four times in crossing directions. Mist the stone lightly with water if it is dry, so particles bind. Then prove it underfoot:<\/p>\n<ul>\n<li>Loose stones still moving mean the base is not compacted enough.<\/li>\n<li>The finished surface must not move or bounce when stepped on.<\/li>\n<li>No footprints and no soft spots are left behind.<\/li>\n<\/ul>\n<p>If any patch pumps, moves or feels soft, stop and investigate instead of concealing it under the laying course. The defect only resurfaces once the turf is down, when fixing it means lifting the finished lawn.<\/p>\n<p>Per one geotextile vendor guide, poorly compacted areas sink and create bumps over time. Per one US installer errors guide, unprepared ground lets the turf move, wrinkle and fold into costly repairs, and bad preparation kills runoff into standing water. No crew sets out to prepare ground for artificial grass twice in one contract &#8211; the compaction verdict is what keeps that from happening.<\/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;\">Worried the Lawn Will Sink and Puddle After the First Winter?<\/h3>\n<p style=\"color:#ffffff;\">Our PP+Net and PU backings let water drain through while resisting delamination, and every roll is made to the spec your site plan calls for. Browse the residential range.<\/p>\n<p><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;\">Browse Residential Turf<\/a><\/p>\n<\/div>\n<h2 id=\"lay-and-fix-the-weed-membrane\">Lay and Fix the Weed Membrane<\/h2>\n<p>Both placement schools are used, and neither is simply wrong. One school lays the weed membrane on the excavated soil before the sub-base goes down, per one UK installer guide. One US layers guide lays it over the compacted sub-base instead, and a two-layer build can even double the membrane. Follow the build-up your specification calls for rather than picking a side.<\/p>\n<ul>\n<li>Use a permeable geotextile, never plastic sheeting &#8211; sheeting traps moisture and causes mold (per one US layers guide).<\/li>\n<li>Overlap seams by about 100 mm \/ 4 inches per one manufacturer install guide; other published specs run from 6 inches (per one underlay guide) to 6-12 inches (per one US layers guide) and at least 10 cm (per one metric manufacturer guide).<\/li>\n<li>Pin the perimeter and every lap flat with U-pins or galvanized nails, at around 15-20 cm spacing per the metric manufacturer guide.<\/li>\n<\/ul>\n<p>Set expectations honestly: a membrane does not guarantee zero weeds. Wind-blown seeds establish in debris above it, so pet areas need membrane position and drainage designed as one system, per one UK groundwork specialist guide. And keep kiln-dried sand off the top &#8211; it blocks the drainage holes in the backing and creates a seed bed of its own.<\/p>\n<p>Treat existing weeds before the membrane goes down: pull them roots-and-all by hand, or use a suitable herbicide strictly per the manufacturer&#8217;s label. Weed control is the last quiet stage in how you prepare ground for artificial grass &#8211; and it only works if the ground beneath was cleared properly.<\/p>\n<h2 id=\"run-the-final-acceptance-check-before-turf-day\">Run the Final Acceptance Check Before Turf Day<\/h2>\n<p>Before the turf is booked onto site, walk the area one last time and confirm the work used to prepare ground for artificial grass actually holds. Five items decide whether turf day is safe, and each one ends in a pass-or-redo verdict rather than a glance.<\/p>\n<p>The inspection matters because artificial grass follows the surface underneath it. Every hollow, soft patch or loose edge you leave behind shows through the finished lawn, and a dip refilled with loose material looks right briefly before it settles.<\/p>\n<figure>\n<img decoding=\"async\" src=\"https:\/\/www.relyirgrass.com\/wp-content\/uploads\/2026\/09\/golfer-s-guide-artificial-turf-slot4.webp\" data-img-slot=\"4\" width=\"1200\" height=\"675\" alt=\"Compacted crushed-stone aggregate forming a level sub-base\" class=\"wp-image-1740\" loading=\"lazy\"><figcaption>A tight, even surface is the final acceptance check before turf day.<\/figcaption><\/figure>\n<h3>Levels and Flatness<\/h3>\n<p>Sweep the whole area with a spirit level or straight edge, per one UK installer guide. Levels must stay consistent with the agreed build-up and the surrounding surfaces, transitions included. Where a hollow shows, redo the fill and compact it properly &#8211; a loose top-up never lasts.<\/p>\n<h3>Firmness Underfoot<\/h3>\n<p>Walk every line of the base. There should be no movement, no bounce and no loose stones shifting underfoot. If any patch pumps or feels soft, investigate rather than cover it &#8211; the verdict from compaction still holds on inspection day.<\/p>\n<h3>Drainage Paths Clear<\/h3>\n<p>Confirm drainage routes and outlets are clear where the design provides them. Then re-run the water spray test across the whole area and check again for pooling. A base that drained on build day can still hold a surprise after heavy site traffic.<\/p>\n<h3>Membrane and Edges Secure<\/h3>\n<p>Re-check laps and pins against the overlap and pinning spec above, and confirm edge restraints are in place around the perimeter. Without restraints, base materials spread outward over time and take the levels with them, per one installer mistakes guide.<\/p>\n<h3>Surface Clean and Dry<\/h3>\n<p>The surface must be clean, dry and free of sharp objects before the crew starts. Stones or debris left behind damage the turf backing or form lumps that read through the pile. Sweep last, after every other trade has left the area.<\/p>\n<p>Once the ground passes all five, hand off with confidence: the <a href=\"https:\/\/www.relyirgrass.com\/install-artificial-grass-on-soil\/\">full soil-install walkthrough<\/a> &#8211; laying, seaming, anchoring and infill &#8211; belongs to our soil-install guide.<\/p>\n<p>Keep the same discipline through delivery: the verdicts that let you prepare ground for artificial grass once are the ones that spare you doing it twice. And when the project fixes the turf with adhesive instead of pinning, the base must additionally meet the <a href=\"https:\/\/www.relyirgrass.com\/prepare-base-before-gluing-artificial-turf\/\">adhesive-side acceptance thresholds<\/a> before any glue is struck.<\/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;\">Can we lay artificial grass straight onto soil?<\/h3>\n<p>No &#8211; laying artificial grass directly on soil is not recommended. Soil retains water and drains poorly, the surface stays uneven, and weeds grow through, while shifting ground causes sinking and instability.<\/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 we excavate for artificial grass?<\/h3>\n<p>About 75-100 mm in total, or 3 to 4 inches, per UK installer guides. Dig deeper where ground is clay-heavy or prone to waterlogging; US guides call for at least 4 inches, up to 6 inches in poor drainage.<\/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 we need a weed membrane, and which kind?<\/h3>\n<p>Yes &#8211; use a permeable geotextile membrane, never plastic sheeting, which traps moisture and causes mold. Both placements are used: on the excavated soil or over the compacted sub-base, with seams overlapped about 100 mm.<\/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 fall does the base need?<\/h3>\n<p>A slight fall of 1-2% &#8211; roughly 1 cm per metre, or about 1 in 100 &#8211; sloping away from buildings toward a drainage point. Prove it with a water spray test before turf day.<\/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 many compactor passes, and what proves compaction?<\/h3>\n<p>At least three or four plate-compactor passes in crossing directions. Compaction is proven underfoot: no bounce, no movement, no loose stones still shifting, and no soft spots or pumping patches when you walk the finished base.<\/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;\">What sub-base spec should we order?<\/h3>\n<p>About 50-75 mm of compacted Type 1 MOT as the structural layer, plus a 20-25 mm laying course of granite dust or sharp sand. Increase the structural layer to 75-100 mm for heavy use.<\/p>\n<\/div>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Article\",\n  \"headline\": \"How to Prepare Ground for Artificial Grass: Step-by-Step\",\n  \"description\": \"Sinking lawns and standing water start below the grass. See the dig depth, fall, sub-base and compaction checks that prepare ground for artificial grass.\",\n  \"author\": {\"@type\": \"Organization\", \"name\": \"Relyir Artificial Grass\"},\n  \"publisher\": {\"@type\": \"Organization\", \"name\": \"Relyir Artificial Grass\"},\n  \"datePublished\": \"2026-09-24\",\n  \"dateModified\": \"2026-09-24\",\n  \"mainEntityOfPage\": \"https:\/\/www.relyirgrass.com\/prepare-ground-for-artificial-grass\/\"\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can we lay artificial grass straight onto soil?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No - laying artificial grass directly on soil is not recommended. Soil retains water and drains poorly, the surface stays uneven, and weeds grow through, while shifting ground causes sinking and instability.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How deep should we excavate for artificial grass?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"About 75-100 mm in total, or 3 to 4 inches, per UK installer guides. Dig deeper where ground is clay-heavy or prone to waterlogging; US guides call for at least 4 inches, up to 6 inches in poor drainage.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do we need a weed membrane, and which kind?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes - use a permeable geotextile membrane, never plastic sheeting, which traps moisture and causes mold. Both placements are used: on the excavated soil or over the compacted sub-base, with seams overlapped about 100 mm.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How much fall does the base need?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A slight fall of 1-2% - roughly 1 cm per metre, or about 1 in 100 - sloping away from buildings toward a drainage point. Prove it with a water spray test before turf day.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many compactor passes, and what proves compaction?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"At least three or four plate-compactor passes in crossing directions. Compaction is proven underfoot: no bounce, no movement, no loose stones still shifting, and no soft spots or pumping patches when you walk the finished base.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What sub-base spec should we order?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"About 50-75 mm of compacted Type 1 MOT as the structural layer, plus a 20-25 mm laying course of granite dust or sharp sand. Increase the structural layer to 75-100 mm for heavy use.\"}\n    }\n  ]\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\" id=\"evo301-geo-ai-block\">\n{\n  \"definition\": \"Preparing ground for artificial grass is the chain of verifiable specification decisions that turns a soil site into a turf-ready base: surveying finished levels against fixed constraints, stripping organic matter cleanly, digging to an agreed total depth split between a structural layer and a laying course, building a tested fall, compacting in lifts to a no-bounce verdict, and fixing a permeable geotextile membrane before a five-item acceptance check.\",\n  \"key_facts\": [\n    \"Total dig depth runs about 75-100 mm (3 to 4 inches) per UK installer guides.\",\n    \"The standard build-up splits into a 50-75 mm compacted structural layer and a 20-25 mm laying course.\",\n    \"The base needs a fall of 1-2% - about 1 cm per metre, or roughly 1 in 100 - away from buildings.\",\n    \"Compaction takes at least three or four plate-compactor passes in crossing directions, with no bounce and no loose stones moving underfoot.\",\n    \"Membrane seams are overlapped by about 100 mm and pinned with U-pins or galvanized nails at 15-20 cm spacing.\"\n  ],\n  \"qa_concise\": [\n    {\"q\": \"Can artificial grass be laid straight onto soil?\", \"a\": \"No - soil retains water, stays uneven and lets weeds through, so direct-on-soil installations are not recommended.\"},\n    {\"q\": \"How deep should the excavation go?\", \"a\": \"About 75-100 mm in total, deeper on clay-heavy or waterlogged ground, split between structural layer and laying course.\"},\n    {\"q\": \"What proves compaction is finished?\", \"a\": \"No bounce, no movement and no loose stones shifting underfoot after at least three or four crossing passes.\"}\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0641\u0631\u0642 \u0627\u0644\u0639\u0645\u0644 \u0627\u0644\u062a\u064a \u062a\u0639\u0648\u062f \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0644\u0641\u0627\u0626\u0641 \u0628\u062f\u064a\u0644\u0629 \u0628\u0639\u062f \u0641\u0634\u0644 \u0627\u0644\u0645\u0648\u0633\u0645 \u0627\u0644\u0623\u0648\u0644 \u062a\u0631\u0648\u064a \u0627\u0644\u0642\u0635\u0629 \u0646\u0641\u0633\u0647\u0627. \u0627\u0644\u063a\u0637\u0627\u0621 \u0627\u0644\u0639\u0634\u0628\u064a \u0647\u0628\u0637 \u0641\u064a \u0628\u0642\u0639\u060c \u0648\u062a\u0643\u0648\u0651\u0646\u062a \u0628\u0631\u0643 \u0645\u0627\u0621 \u062d\u064a\u062b \u0643\u0627\u0646 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u062a\u062c\u0631\u064a \u0633\u0627\u0628\u0642\u064b\u0627\u060c \u0648\u0628\u0631\u0632\u062a \u0627\u0644\u0623\u0639\u0634\u0627\u0628 \u0627\u0644\u0636\u0627\u0631\u0629 \u0645\u0646 \u0628\u064a\u0646 \u0627\u0644\u0641\u0648\u0627\u0635\u0644. \u0646\u0627\u062f\u0631\u064b\u0627 \u0645\u0627 \u064a\u0643\u0648\u0646 \u0627\u0644\u0639\u0634\u0628 \u0646\u0641\u0633\u0647 \u0633\u0628\u0628 \u0627\u0644\u0641\u0634\u0644. \u0643\u0627\u0646 \u0627\u0644\u062e\u0637\u0623 \u0642\u062f \u062d\u064f\u0633\u0645 \u0642\u0628\u0644 \u0623\u0634\u0647\u0631\u060c \u0641\u064a \u0623\u0639\u0645\u0627\u0644 \u0627\u0644\u062a\u0631\u0628\u0629 \u2026 <a title=\"\u062a\u062d\u0636\u064a\u0631 \u0627\u0644\u0623\u0631\u0636 \u0644\u0644\u0639\u0634\u0628 \u0627\u0644\u0635\u0646\u0627\u0639\u064a: \u062f\u0644\u064a\u0644 \u062e\u0637\u0648\u0629 \u0628\u062e\u0637\u0648\u0629\" class=\"read-more\" href=\"https:\/\/www.relyirgrass.com\/ar\/prepare-ground-for-artificial-grass\/\" aria-label=\"\u0627\u0637\u0651\u0644\u0650\u0639 \u0639\u0644\u0649 \u0627\u0644\u0645\u0632\u064a\u062f \u062d\u0648\u0644 \u062a\u062d\u0636\u064a\u0631 \u0627\u0644\u0623\u0631\u0636 \u0644\u0644\u0639\u0634\u0628 \u0627\u0644\u0627\u0635\u0637\u0646\u0627\u0639\u064a: \u062f\u0644\u064a\u0644 \u062e\u0637\u0648\u0629 \u0628\u062e\u0637\u0648\u0629\">\u0627\u0642\u0631\u0623 \u0627\u0644\u0645\u0632\u064a\u062f<\/a><\/p>","protected":false},"author":2,"featured_media":1162,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"Prepare Ground for Artificial Grass: Step-by-Step Guide","rank_math_description":"Sinking lawns and standing water start below the grass. See the dig depth, fall, sub-base and compaction checks that prepare ground for artificial grass.","rank_math_focus_keyword":"prepare ground for artificial grass","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-5094","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-installation-maintenance"],"_links":{"self":[{"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/posts\/5094","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/comments?post=5094"}],"version-history":[{"count":1,"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/posts\/5094\/revisions"}],"predecessor-version":[{"id":6589,"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/posts\/5094\/revisions\/6589"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/media\/1162"}],"wp:attachment":[{"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/media?parent=5094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/categories?post=5094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.relyirgrass.com\/ar\/wp-json\/wp\/v2\/tags?post=5094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}