Rust Spots

In some parts of the country, the crushed stone aggregate used in asphalt or concrete may contain iron. It is impossible to obtain a guarantee from an asphalt or concrete producer or supplier against the presence of this material, particularly if their source has a history of providing aggregates containing iron. Also, since a producer’s source of aggregate may vary from time to time, it is impossible to predict whether a particular batch of asphalt will contain iron or to rely on the fact that the asphalt or concrete from a given producer or supplier has not contained iron in the past. Therefore, this condition is beyond the control of the contractor and the contractor cannot assume responsibility. In areas where this occurs, it will affect all local contractors equally.

If iron is present, it may oxidize, forming rust spots or streaks in the surface of the court. These spots or streaks, while unsightly, will not affect play or shorten the useful life of the court.

The manufacturers of some acrylic tennis court surfacing systems produce a rust inhibitor product, used as a filler coat in surfacing. While this product has been used with success, there is no guarantee that rust spots will not occur.

An overlay, using asphalt or concrete from a different source, or a change of surface to a textile, modular or roll goods surface, will be required to permanently correct this problem.

Differences in site, weather and soil conditions require variations in construction and repair methods and materials. Readers are advised to consult a qualified contractor or design professional before undertaking construction or repair of a court. Rev. 2023