How cooling infill works
Cooling infills use a hygroscopic coating that absorbs water, then releases it slowly as vapor. Evaporation pulls heat from the turf system, which lowers surface temperature. The effect requires hydration from a hose, irrigation mist, or splash water. No water means no evaporative cooling.
- Mechanism: water in the coated infill evaporates and absorbs heat energy.
- Activation: a quick mist or splash is enough to start the effect.
- Duration: cooling typically lasts 1 to 4 hours depending on sun, wind, humidity, and water volume.
How much cooling to expect
Typical temperature drop
Most real world installations see roughly 15 to 30 degrees Fahrenheit lower surface temperatures while the infill remains hydrated. The biggest drops occur under intense sun with low to moderate humidity and good airflow.
Factors that change results
- Sun exposure and time of day
- Climate and humidity level
- Turf fiber color and face weight
- Pile height and density
- Infill depth, distribution, and water volume
- Airflow and surrounding hardscape that radiates heat
Activation and care
Hydration guidance by climate
- Arid or desert: light mist once mid morning and again mid afternoon on peak heat days.
- Humid subtropical: quick rinse early afternoon as needed.
- Coastal or temperate: occasional rinse on high UV days.
Use a fine spray. You are recharging the infill, not soaking the base.
Simple field test
- Measure surface temp at solar noon with an infrared thermometer.
- Mist the area for 30 to 60 seconds per 100 square feet.
- Recheck temps after 5 minutes and again at 30 minutes to see peak drop and persistence.
How much cooling infill to use
- Follow the infill manufacturer spec for your turf. Typical landscape systems use 1.0 to 2.0 pounds per square foot total infill.
- Many crews install standard silica or TPE as the base layer, then top dress 0.5 to 1.0 pound per square foot of cooling infill for best activation.
- Keep infill below the tips of the fibers. Power broom to settle and even out distribution.
Safety and compatibility
- Pool friendly: coatings used in cooling infill are designed to be stable around chlorine and saltwater splash.
- Pet friendly: choose non toxic, heavy metal free, and low dust products. Rinse areas used by pets to refresh cooling and hygiene.
- Drainage: cooling infill works with perforated backings and standard compacted bases. Do not block weep holes.
- Slip awareness: around pools, avoid overwatering. Mist lightly so surfaces stay grippy.
Cost and ROI
- Material premium: expect roughly 0.50 to 1.50 dollars per square foot more than basic silica.
- Water use: a light mist is efficient. Many sites use about 1 to 3 gallons per 100 square feet per refresh.
- Payoff: cooler surfaces extend usable hours, reduce complaints, and improve guest comfort around hot hardscapes.
Alternatives and add ons
- Lighter fiber colors and reflective resistant yarns reduce heat gain.
- Shade solutions such as pergolas or shade sails cut direct solar load.
- Organic infills like cork can run cooler but may not be ideal near pools due to buoyancy and maintenance. Use where appropriate.
- Mitigate window reflections with screens or films if you see localized hotspots.
Installer tips from FusionTurf
- Pre plan the cooling strategy during design. Consider sun angles and adjacent hardscape.
- Spread infill in thin lifts, broom between passes, and verify depth with a gauge.
- Top dress cooling infill last to keep it near the surface for faster activation.
- Document a before and after temperature test at turnover to set clear expectations.
When cooling infill is worth it
- Pool decks, roof decks, and south or west exposures with full sun.
- Desert and high UV regions where surface temps spike.
- Homes with kids and pets that need mid day comfort.
When you might skip it
- Mostly shaded lawns with limited mid day sun.
- Cooler climates where peak heat is rare.
- Low use areas where mid day play is not a priority.
