Top dressed plating surface with resilient underpad

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawing figure comprises a sectional view through a playing surface according to the present invention.
The playing surface 1 starts with a firm, stable subsurface 2 upon which the remainder of the playing surface is constructed.
A moisture barrier layer 3 is disposed over subsurface 2.
Next, a resilient underpad 4 is placed over the moisture barrier layer.
A second moisture barrier 5 is positioned over the resilient underpad to prevent moisture from penetrating the underpad.
A pile fabric 6 with generally upstanding pile elements resembling grass is positioned on top of moisture barrier 5.
In the drawing the pile fabric 6 is depicted as a woven fabric backing 7 through which a plurality of segments of multifilament yarn 8 have been tufted to form the upstanding piles.
At the free ends of the tufts, the individual filaments 9 can be seen.
Among the pile elements on the backing there is a compacted layer of sand top dressing 10.
Subsurface 2 establishes the contour of the playing surface.
In order to provide a good playing surface, the subsurface must be smooth.
For a golf green it is not necessary that the surface be either level or flat, but it must be free of waves and ripples.
Subsurface 2 should be sufficiently compacted that it will not settle or shift after installation of the playing surface but will provide a firm, stable foundation for the playing surface.
The subsurface 2 may consist of concrete or asphalt pavement, compacted clay, gravel rolled into ordinary dirt or any of a number of other firm materials.
A four inch thick layer of traffic bond provides a particularly suitable subsurface.
Adequate subsurface drainage should be provided.
For golf greens, it will be appreciated that an irregularly contoured subsurface will be desirable.
For most other games (e.
g.
, tennis, baseball, etc.
) a flat, generally level surface will be preferred.
A slight slope may be provided to facilitate surface drainage.
Moisture barrier layer 3 functions to reduce water penetration and heaving and to protect the resilient underpad from ground moisture