A court owner I know ordered a new carpet in spring and saw wrinkles within the week. The fixing crew promised the rolls would settle; they did not. Seams glued straight onto concrete tell the same story, giving out long before the carpet itself wears out.
I build tennis carpet for a living and read every court from the sub-grade up. In artificial grass tennis court construction, the surface only plays as well as everything beneath it allows. This guide walks the stack in build order, using the numbers the governing bodies publish. Where carpets fail early, the cause sits below the fibre.
A Tennis Court Is a System, Not a Surface
Most descriptions of artificial grass tennis court construction stop at the carpet, and that is where budgets go wrong. The surface is one layer in a stack the ITF describes as Formation, Foundation, Regulating base and Wearing surface. Each layer exists to protect the ones above it.
That framing matters commercially. A buyer who specifies only the carpet inherits every defect beneath it – no fibre, sand or backing can flatten a base that was never level. The general-purpose layer stack behind any synthetic turf build works the same way, and the layers overview breaks down what sits beneath turf in any application.
Reading bottom-up also changes the tender-stage questions. Instead of comparing pile heights, you ask how the formation was compacted and how water leaves. Those answers predict the ten-year court.
The Foundation: What the Court Stands On
Everything starts with ground nobody will see again. Two things happen before any stone arrives: the soil is cleared, then it is engineered.
Sub-Grade First
Per the ITF court construction guide, topsoil comes off first because organic matter rots and makes an unstable base. What remains is compacted and levelled into the sub-grade. The STC guidelines add a second duty – the sub-grade must be pitched so stormwater runs toward a working drainage system, with laser-guided equipment strongly recommended.
The Geotextile Layer
A woven or fleecy PE membrane separates the formation from the foundation above. Per the ITF court construction guide, that separation keeps the foundation porous, spreads the load and blocks root growth. Skip it and the stone below slowly silts shut.
The Base: Porous Asphalt in Two Courses
The base is where court building becomes civil engineering. Two courses of porous asphalt carry the court, both existing to pass water while holding the planes above and below stable. Per the ITF asphalt court guidance, the asphalt is aggregate, often limestone, bound with bitumen, with finer grades closer to the top.
The full artificial grass build-up, quoted bottom to top, reads like this.
| Layer | Specification |
|---|---|
| Geotextile membrane | Separates formation from foundation; drainage added here if required |
| Foundation | Compacted non-frost-susceptible limestone or granite, minimum 150mm |
| Base course | 40mm porous asphalt |
| Wearing course | 25mm open-grade porous asphalt with 6mm aggregate |
| Surface | Sand-filled artificial grass carpet |
The table comes, per the ITF court construction guide, from the build-up specified for artificial grass surfaces. The 40mm base course is the structural body, while the 25mm wearing course uses 6mm aggregate for a tighter plane. Laying is hand work – hot asphalt raked between laser-set steel bars, then rolled before the bitumen cools.
Drainage and Fall: The Layer Nobody Sees
Water is the client the base was built for. The formation is laid, per the LTA court surfaces guidance, to a 1:200 fall in a single plane, along or across the court, and compacted. Above the membrane sits a minimum 150mm of 28mm free-draining, non-frost-susceptible aggregate, deepened where soil demands.
Flatness is policed with a straightedge. The same LTA guidance allows no more than an 8mm gap under a 3m straightedge on the wearing course. Smaller dips still trap water and read as puddles once carpet and sand go down. How drainage bases handle water beneath the surface, layer by layer, is covered in the drainage overview.
Before the carpet arrives. The rollout is the last cheap chance to fix low spots. Any dip that holds water after rain must be reworked while the surface is still asphalt – once carpet covers it, the puddle becomes a permanent tenant.
Shock Pads: Optional by Design
Between base and carpet sits the layer that is deliberately absent from the official stacks: the shock pad. Neither the ITF build-up nor the LTA minimum design requires one, so a pad is a choice, not a given. It adds cushioning between the asphalt plane and the carpet, and every later decision then sits on top of it. The honest question is what the pad is for.
The Carpet: What Actually Arrives on Site
The rollout is the day artificial grass tennis court construction finally becomes visible, and the delivery is rolls, not tiles. Artificial grass is supplied in rolls, per the ITF court construction guide, and outdoors it must lie on a porous base so water can leave. What unrolls is a product with its own anatomy.
Two carpet families exist for tennis, per the LTA court surfaces guidance. Tufted carpets loop tufts into a woven primary backing anchored with a latex screed. Drainage comes from holes punched through the backing, normally every 100mm. Needle punch carpets are wholly fibre-based textiles – highest porosity, lowest sand content and less routine maintenance, though moss establishes more readily near trees.
Sand Does the Structural Work
The pile of a sand-filled carpet is flexible and cannot stand upright on its own. Sand is what keeps the fibres vertical and the surface firm, per the LTA court surfaces guidance. Infill goes down dry, evenly and in several lifts, dragged between passes to lift the fibre, per the STC guidelines.
Pile Height and Yarn
Tennis sits on medium or short piles, from 15mm down to 10mm, with density, fibre length and sand fill together deciding how the ball comes off the surface. Fibrillated yarn starts as a 10mm strip that splits along its length and eventually mats down. Monofilament yarn, about 1mm per fibre, stays open far longer. The pile, density and sand-filling numbers behind a turf spec sheet are worth a read before the rollout.
Seams and Fixing: Holding the Court Together
Seams are where artificial grass tennis court construction is won or lost quietly. Synthetic turf arrives as panels and rolls, most commonly 4m wide, per the STC guidelines. The joins must be bonded or sewn into what behaves as a single sheet.
- Tape under the backing. Seaming tape is a fabric laid beneath the backing on both sides of the joint. The STC guidelines recommend tape 12 inches or wider with adhesive across its full width – more bonded area, stronger seam.
- A permanent bond. The bond between panels must be permanent, tight, secure and free of hazards. A seam that ridges or lifts becomes a playing defect and a trip hazard.
- Width before seams. Roll width decides seam count, which is why we cut tennis carpet at 2m, 4m and 5m and match width to court geometry. Fewer joins mean fewer places to fail.
Timing matters as much as materials. Seams and inlays are the last correction window before sand goes in – re-opening a cured seam means pulling infill, re-bonding and re-filling. A crew that reaches for glue the moment carpet touches asphalt skips the alignment check between the two.
Court Lines: Tufted, Inlaid or Painted
Tennis lines are most often marked permanently, per the LTA court surfaces guidance. That makes them a decision taken during artificial grass tennis court construction, not after it. Each route fixes the line at a different moment, with different consequences for accuracy and cost.
Woven at the Factory
Tufted lines are incorporated into the parent carpet during manufacture. The geometry is locked before the carpet leaves the line, guaranteeing clean edges with no room for a changed layout. For a standard court, that certainty is worth having.
Cut and Bonded on Site
Inlaid lines are cut in on site. A strip of the parent roll is removed and a line carpet of the same construction, in a different colour, is bonded into the gap. Per the STC guidelines, fibres must not be trapped in the adhesive and the gap must be minimal and even – no more than 2mm in a non-sand-filled system. Seam tape rules apply to line cuts as they do to panel joins.
The Reversible Route
Paint is the third option, applied to upright fibres brushed clear of sand. A new court may need several coats before the marking reads cleanly, per the STC guidelines. Paint wears with the surface, so marking returns as a recurring item, not a one-time cost.
The real question is who controls accuracy – factory, site crew or maintenance schedule. Decide it at tender, because the answer outlives every contractor.
How the Build Sequence Unfolds
Followed from the boundary inward, artificial grass tennis court construction reads as one continuous argument with water and frost. Sub-grade is stripped, shaped and pitched, then geotextile keeps the stone clean. The stone foundation carries load and frost, two asphalt courses set the planes, and carpet, seams and sand finish the court.
Sequence is not cosmetic. Compaction after the membrane is down can damage it. Asphalt rolled too late will not dense up. Sand spread wet or in one dump buries the fibre it is meant to support. Every shortcut resurfaces later as a defect nobody can fix cheaply.
The glue window is the real deadline. Between carpet alignment and infill, seams and inlaid lines are still correctable – once the adhesive cures, court geometry is fixed. Treat curing time as the final inspection slot – fall, seams and line positions checked before any sand goes down.
What Construction Does to the Way the Ball Plays
Everything above converges on the bounce, and artificial grass tennis court construction sets it long before the first serve. The LTA guidance keeps this qualitative: yarn density, pile length and sand fill together decide how the ball comes off the surface. Those properties shift as carpet and fill age.
- Pile height and fill. Shorter piles and firmer sand present a quicker, lower surface; taller or looser fill slows the ball and softens the bounce.
- Yarn type. Fibrillated yarns split and mat as they age, changing how the ball meets the surface; monofilament yarns hold their shape far longer.
- The plane underneath. Fall, flatness and drainage decide whether the bounce stays true in year one and in year ten.
None of these are carpet-only properties. The carpet spec is just the visible part of the playing surface. The layers above deserve as much of the tender as the green layer gets.
Specifying the Carpet for Your Next Court?
See tennis turf built to your project spec – pile height, density and roll width configurable, samples sent before you commit.
Where Tennis Court Construction Goes Wrong
The failure file for artificial grass tennis court construction is short and repetitive – a handful of mistakes accounts for most early disappointments.
New-Carpet Wrinkling
New-carpet wrinkling is the classic: rolls unrolled wet, sand dumped in one pass, no time for roll memory to relax.
Skipped Seam Tape
Seams fail when tape is skipped or adhesive is spread thin.
Seams Glued to Concrete
Seams glued straight onto concrete tend to crack open early.
Ponding and Frost Heave
Ponding and frost heave trace back to skipped compaction or a fall that was never checked.
The first week is the audit. Watch a new court for its first seven days. Wrinkles that tighten and disappear are roll memory settling; wrinkles that persist mark a fixing or seam problem. Raise them inside the window, while correction still costs a crew day, not a re-lay.
Specifying a Court That Still Plays Right in Ten Years
Durability is decided at tender, not at failure. Per the LTA court surfaces guidance, a specialist should review the site before anything is tendered. For a new court, that review includes soil samples to establish the stone foundation depth required. The work should be tendered to three or more specialist contractors. Where a site has already subsided, drained badly or cracked, the review needs an engineering specification.
A poor base can even mean a full rebuild with a new stone foundation and two fresh asphalt layers. The LTA guidance puts the life of a porous asphalt base at ten to twelve years, depending on construction, drainage, use and maintenance. That is roughly the horizon to spec against. A build written down layer by layer, depths and tolerances in the contract, still plays right a decade on – with the carpet from our tennis turf.
Frequently Asked Questions
How many layers does an artificial grass tennis court have?
Five, per the ITF court construction guide. The stack runs geotextile membrane, minimum 150mm stone foundation, 40mm base asphalt, 25mm open-grade surface course, then the sand-filled artificial grass carpet.
What base does artificial tennis turf need?
A free-draining one – outdoors, artificial grass needs a porous base of concrete or asphalt so water can escape, per the ITF court construction guide. Porous asphalt over compacted stone is the standard tennis build.
Are tennis court lines tufted, inlaid or painted?
All three exist. Lines are tufted into the carpet during manufacture, inlaid on site by bonding a line strip into a cut, or painted onto upright fibres. Tufted and inlaid are permanent; painting recurs.
How much does it cost to build an artificial grass tennis court?
Per the LTA court surfaces guidance, an artificial grass court sits between £50,000 and £60,000 per court, with the figure moving on specification and court count. The same guidance suggests a yearly sinking fund for eventual carpet replacement.
Why is my new artificial grass court wrinkling?
Most wrinkles appear in the first days while roll memory relaxes and sand is still being brushed in, so watch the first week. Wrinkles that persist point to poor fixing, poor seams or a base that was never right.
