Posted: Wed Jul 09, 2008 2:12 am
Hello.
A local school had a new bitmac tennis court laid at the end of Spring; the surface course was 0/6mm open bitmac. Two days following laying, the surface was spray-painted with green acrylic paint on the court itself. Grey acrylic was sprayed around the perimeter. The paints were water-based acrylic (allegedly).
After one month, the paint appeared to have shrunk and cracked in a leaf-like pattern. Where cracked, the outer edges had curled up and the paint film had detatched, lifting the surface from off the underlying bitmac. A black coating was on the surface of the acrylic and appeared to be some sort of mould or algae. Areas which had received a double coating, i.e., the perimeter strip and spray-pattern overlaps, appeared to be affected less.
There is no problem with unpainted tarmac.
The court has since been resurfaced, and appears to be OK (fingers crossed).
Logic points to the paint - but acrylic is recommended for this type of surface and use.
I would appreciate it if anyone could give me an idea what the cause of the failure may be. Would temperature/wet conditions affect the paint in this way?
Thank you.
A local school had a new bitmac tennis court laid at the end of Spring; the surface course was 0/6mm open bitmac. Two days following laying, the surface was spray-painted with green acrylic paint on the court itself. Grey acrylic was sprayed around the perimeter. The paints were water-based acrylic (allegedly).
After one month, the paint appeared to have shrunk and cracked in a leaf-like pattern. Where cracked, the outer edges had curled up and the paint film had detatched, lifting the surface from off the underlying bitmac. A black coating was on the surface of the acrylic and appeared to be some sort of mould or algae. Areas which had received a double coating, i.e., the perimeter strip and spray-pattern overlaps, appeared to be affected less.
There is no problem with unpainted tarmac.
The court has since been resurfaced, and appears to be OK (fingers crossed).
Logic points to the paint - but acrylic is recommended for this type of surface and use.
I would appreciate it if anyone could give me an idea what the cause of the failure may be. Would temperature/wet conditions affect the paint in this way?
Thank you.