Most
boccedromes ( Campi di Bocce ) in Italy now use a synthetic surface for
play. This surface is laid over a carefully built up substrate of other
layers including stone and asphalt. The final surface is poured on and
let to settle by gravity over that perfectly flatly prepared
subsurface. Sand is dusted on the final dried and set up surface to
give something like the original quality and “feel” of the old style
outdoor terrains.

Synthetic court construction
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Leveling the sub surface
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Pouring the final synthetic surface
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A reference site for this special surface material is.
Mantoflex http://www.mantoflex.it/TEST/resine_systembocce.htm
And for companies that have proven skills in laying these surfaces here are a few.
Mallozzi http://www.mallozzimario.it/
Olympia Costruzioni http://www.olimpiacostruzioni.it/
I.S.G. http://isgsport.com/vetrina/index.php?cat=13
Cocconi http://www.cocconi.it/home.html
Aurelio Colleoni http://aureliocolleoni.com/eng/home.html
( This company has made several courts in the USA including Campo di Bocce & Pallazzo di Bocce )
Centro Italia Sports http://www.centroitaliasport.it/home.htm
http://www.centroitaliasport.it/bocce.htm#
Detailed court construction ( in Italian )
http://www.archweb.it/dwg/sport_giochi/bocce/bocce_2d.htm
and Surface
http://www.archweb.it/dwg/sport_giochi/bocce/bocce_costruz.htm