
Construction
As always, begin construction by transferring the design to the side using grade stakes, then excavating 12" below final grade. The corner stakes can be used to support a line showing the limits of the excavated area and the final grade of the court. Measure down from the string lines and excavate.
After the subgrade is set, install the drain system as described above. Use a level and elevation rod to ensure a downward slope toward the collector drain.
Once the drain system is in place, install the net posts before filling the excavated area with sand. That way, all the soil from the postholes can be removed before sand is installed. If the budget allows, it's a good idea to line to entire excavated area with filter cloth. That keeps the sand and subsoil from mixing. Then fill the excavated area with sand, level and play.
Reconstruction
Usually, someone embarks on a reconstruction project for one of two reasons: either the wrong sand was used, or no drain system was installed at construction. If sand was the problem it could be replaced with a new sand of the correct particle size.
In either case, begin by removing the sand. Then carefully inspect the existing drain system. Some existing systems have poor slope or none at all. Some systems become clogged and can be cleaned out. Some are even installed without outlets.
Having analyzed the existing system, the planner can decide whether to try to improve the existing system or replace it. Under some circumstances (like systems with poor slope or too few drains), it may be much easier to install a new system than to fix an existing one. But frequently, an existing system can be upgraded to provide years of good service.
It's important to start reconstruction at exactly the same point as new construction described above: the grade. Set stakes and lines and rework the sub-base just as you would a new court.