Why does my artificial turf have white chalky patches?
White chalky patches on artificial turf are mineral deposits, mostly calcium carbonate, left behind when irrigation overspray or hard water evaporates on the fibers. They build up near sprinkler heads and hose drip points, feel slightly gritty, and lighten when wet, which is how to tell them from sun fading. They are removed with a mild, turf-safe descaling cleaner and a thorough rinse. TIMELESS Turf Restoration removes hard-water deposits across the Grand Strand as a spot treatment or within a Premium Restoration.
Deposit or fade: the wet-finger test
Wet your finger and rub the white area. Mineral deposit feels slightly gritty, and the patch looks darker and greener while it is wet, then goes white again as it dries. Fading does not change with water and it follows the sun, covering the brightest area evenly, rather than following the sprinkler pattern. Deposits also show first on the fibers nearest the heads and on the side of the yard the wind carries spray to.
Removing it
A mild descaling cleaner formulated for synthetic surfaces dissolves the mineral layer. It is applied, left to dwell, agitated with a soft brush and rinsed thoroughly. Diluted white vinegar does the same job slowly on a light film. What to avoid: muriatic acid and other strong acids, which etch fibers and are dangerous to handle near pets and plants, and pressure washers, which strip the infill out with the deposit. Where a heavy crust has bonded the infill into a crunchy layer, that infill is loosened and cleaned or replaced.
Stopping it
Turf does not need water, so every sprinkler pass onto it is pure mineral. Adjust or cap the heads that throw onto the turf. Move the hose drip. If you rinse the turf in summer, do it in the evening so it does not flash-dry in the sun. On well water, expect to descale once a year regardless, and ask us to check the heads on the visit.
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