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Freeze /Thaw Effect of Har -Tru Courts <br />Frost occurs in the Har -Tru clay court surface profile when water in the <br />surface freezes. Depending on the extent of the freezing weather, frost <br />may extend through the entire 1" thickness of Har -Tru. When sunlight and <br />higher temperature reach the frozen surface the following morning, these <br />ice crystals will begin to melt from the top of the surface downward through <br />the profile. <br />It may take several hours for all ice crystals to melt in the profile. While <br />these ice crystals are melting, water will form on top of the surface and form <br />puddles until the entire surface below begins to thaw. Once the profile has <br />thawed completely the water will drain through the profile. <br />Until the entire profile has thawed and the water has drained back down <br />into the profile, the surface may be too wet for maintenance practice s and <br />for tennis play. We recommend everyone stay off the surface until it is <br />playable and workable since any traffic on a wet surface may compromise <br />the quality of that surface. If players or court maintenance staff enters the <br />playing area before this drying cycle is complete, minor damage to the <br />surface can occur. <br />To repair the indentations (footprints, roller marks, etc.) caused by entering <br />the playing area too quickly, use standard patching techniques or call Har - <br />Tru Sports or your local Har -Tru Clay Court material distributor for <br />guidance. <br />42 <br />25E -30 <br />