Below is a technical breakdown of the DobbsCourt process from start to finish. The DobbsCourt overlay system produces a water-proof monolithic membrane placed over existing asphalt tennis or basketball courts. Upon completion all pre-existing structural cracks and surface planarity irregularities will be permanently corrected. It is suitable for courts that are relatively flat and are not located below grade level of surrounding terrain.
All existing structural cracks are to be filled and leveled with a high-strength acrylic latex bonding liquid that is mixed with silica sand and Portland Cement. The edges of all crack repair products shall be beveled smooth and all spots higher than the existing court surface shall be removed. Pourable or injectable acrylic crack filling materials are not suitable as a crack filling material.
Depressions or “Bird Baths”
The existing court shall be flooded. After one hour of drying in normal sunlight the perimeters of all depressions still holding water shall be marked with chalk or wax crayon. These shall be filled with a high-strength acrylic latex bonding liquid that is mixed with silica sand and Portland Cement. The edges of all depressions patched shall be beveled smooth and all spots higher than the existing surface shall be removed.
Upon completion of court preparation no variations in court planarity greater than 1/8” along a 10’ straight edge in any direction will be allowed. Minor irregularities in the surface plane shall be corrected using a high-strength latex bonding liquid that is mixed with silica sand and Portland Cement prior to the installation of the monolithic overlay products.
All existing court coatings around the perimeter of the court shall be removed. The width of the area in which the coatings are removed shall be a minimum of 6”. This step is done to assure the final adhesive products to be used shall have a solid bond with the existing court.
Monolithic Membrane Installation Process
One 10’ x 60’ rubber mat shall be laid out along the fence line behind each baseline. On a two court installation two mats will be laid out and seamed together using a high-strength bonding agent imbedded in a 6” wide fiberglass scrim creating a single monolithic strip 10 wide’ to fit inside the existing side fences. These pieces are then adhered to the existing court surface using a high-strength bonding agent. The bonding agent shall be fully cured prior to proceeding to the installation of the playing surface pieces.
Playing Surface Pieces
Six rubber mats are then laid out side by side running the length of the court overlapping the installed end pieces. If a two court battery is being installed up to 12 mats may be laid out side by side. The mats are then seamed together using a high-strength bonding agent.
Court Surface Installation
A high-strength acrylic bonding liquid is squeegee applied over the entire monolithic mat. This liquid must thoroughly dry prior to any additional surface coating materials being applied.
Two or three coats of Acrylic Resurfacer with a minimum of 12 lbs. of 60 mesh silica sand added per gallon is then squeegee applied over all seams.
Two coats of Acrylic Resurface with a minimum of 12 lbs. of 60 mesh silica sand added per gallon is then squeegee applied over the entire court surface. The first coat must thoroughly dry prior to the application of the second coat.
Two coats of textured colored acrylic surfacing material are squeegee applied over the entire court surface. The first coat must thoroughly dry prior to the application of the second coat.
2’ wide textured white lines, conforming to the United States Tennis Association’s specifications are then applied by brush or roller.