Service
A tennis court rarely wears out all at once. A crack at the baseline, a puddle in the service box, color lifting by the net post: each can be fixed on its own, until enough pile up that a resurface is the better spend.
Before / after photos coming
Signs it’s time
Tennis court repair means fixing the specific failures in an acrylic court without recoating all of it: filling cracks, leveling birdbaths, scraping and patching peeling color, repainting worn lines and repairing the cracked surface around net post footings. An acrylic system can level a shallow low spot, fill a crack and restore color, but one coating maker’s own specification says acrylic surfacing cannot solve the forces behind cracked, deteriorating or damaged pavement. So it pays to find out what is moving underneath before treating what shows on top.
Repairs make sense when the problems are few and the rest of the color coat is sound. They will not be invisible: fresh color over a patch stands out against a weathered court, and the American Sports Builders Association (ASBA) is candid that some low spots return as the ground keeps settling. If cracks, low spots and peeling cover much of the court, or the color is worn through where people play, the money usually goes further in a resurface, with the repairs folded in.
A crack you filled that has split open again, or one wide enough to catch a shoe, means the pavement on each side is still moving and water is reaching the base.
Water that sits in the same spots after the rest of the court has dried points to a birdbath. Besides holding up play, standing water can stain the color and start it peeling.
Coating that flakes, blisters or comes up in sheets has lost its bond to the court. Common causes are moisture rising from under the pavement, water left standing in birdbaths, and coats laid over a surface that wasn’t clean.
The ITF Rules of Tennis call for lines that contrast clearly with the court. Faded lines start arguments. Cracks that track a white line form because the asphalt under it stays cooler, and moves less, than the darker court beside it.
A net post that has lifted, with the surface cracked around its footing, has typically been pushed up by frost acting on moisture in the ground. A net left tight through winter helps the frost lift it.
Acrylic patch binders are water-based and can shrink as they dry out, so a leveled low spot may hold water again. The ASBA notes that even a skilled contractor may need more than one pass to fine-tune a patch.
The process
Every court is different, but the order of an acrylic job isn’t. Here’s the usual sequence, start to finish.
Every crack, low spot, peel and damaged line gets marked before repair work starts. Drainage around the court and the net post footings matter just as much, because water and movement decide whether a repair will hold.
The court is washed and mildew treated where it grows. Acrylic only bonds to a clean, dry surface, and any coating the wash lifts shows where the peeling really stops.
With the court clean, it gets flooded and left to drain, and every spot still holding water deeper than 1/16 inch is chalked around its edge. Those outlines become the patch map.
Peeling color is scraped and sanded back to coating that is still well bonded, and the bare spots are primed. Cracks are cleaned out, dried and filled the way one coating maker’s spec directs: up to 1/16 inch wide with acrylic resurfacer, wider with an acrylic patch mix.
Following the patch binder maker’s procedure, each chalked birdbath gets a primer coat, then a mix of acrylic binder, sand and cement, troweled or screeded to grade. Once it cures, the edges are rubbed down with a stone until the patch sits flush.
Repairs are colored with acrylic feathered into the surrounding surface, or the whole court is recoated if patches would cover too much of it. Coating makers allow color only with surface and air at 50°F and rising, and no rain coming.
One line-paint maker’s procedure: snap each line with a chalked string, press the tape down tight and seal its edges with clear primer for a crisp edge. Textured line paint then goes on at ITF widths: 2 inches for the center service line, up to 4 at the baselines.
The details
01Residential
On a backyard court you see every flaw up close, because you’re the one playing on it. Often the fix is narrow: one crack across a service box, a puddle by the baseline, lines gone gray. Before you decide, ask how a patch will look against your faded color, and if the court is near its next recoat, whether a cosmetic flaw can wait until then. If trees hang over it, leaves and mildew come off before any repair goes on.
02Commercial
Club, school, HOA and park courts take heavy play, and a crack wide enough to trip a player or a birdbath that delays play after every rain can’t wait for the next resurfacing budget. Sorting each court’s cracks, low spots, peeling and lines separately lets a board or facilities staff fix what’s urgent now and plan which courts to resurface next. Repairing one court at a time can keep the rest of the bank in play.
FAQ
Usually, yes. Most cracks in asphalt and concrete courts run through the pavement into the stone base, and the two sides keep moving with temperature and moisture. Filler seals the top to keep water out of the base and slows the damage; it does not stop the movement. One manufacturer’s data sheet says outright that crack filler is not a permanent repair. Plan on checking cracks each spring and early fall and refilling the ones that open.
The ASBA draws the line at water deeper than 1/16 inch, about the thickness of a nickel, still standing after the court stops draining or after an hour of drying in 70°F sun. Shallower dips are within tolerance. The ASBA also puts patch material’s effective depth at about 1/2 inch, and warns that several birdbaths, or dips 1/2 inch or deeper, may point to more serious problems.
When repairs would cover a large share of the court, when the color is faded or worn through where people play, or when peeling is widespread. Patches over tired color show, and a full recoat hides them. Coating manufacturers publish recoat cycles of roughly four to eight years, depending on play and weather; a court near that age usually gets more from a resurface than from patching. Call Bill at 215-251-2984 to weigh repair against resurfacing for your court.
Not exactly. New color on a patch shows against color that has weathered, and patch texture can differ slightly from the surface around it. Feathering the edges softens the change. One manufacturer advises leaving purely cosmetic patching for the next full recoat, to avoid a patchy, blotchy look, unless the damage is a safety issue. Before any patching, sort the flaws that are only cosmetic from the ones that can’t wait.
Acrylic coatings and crack fillers need surface and air at 50°F and rising, with no rain on the way, and one maker’s patch binder needs 55°F and rising. USTA Middle States adds that the temperature should hold at 50°F or above for a full day once color is down, and points to April through October, depending on the weather. Call 215-251-2984 over the winter to start planning a spring repair.