Rustication

A rustication for preparing reveal bands in the surface of a precast panel, said rustication configured to effect enhanced sealing engagement with a panel-forming surface during formation of said precast panel, said rustication defined by a one piece elongate body of extruded foam, said body comprising:

• an upper surface;
• a lower surface defining a base plane at least a portion of which is configured to engage said panel-forming surface;
• and
• a pair of laterally-spaced sidewall surfaces that join said upper and lower surfaces, each said laterally-spaced sidewall surface including a downward-extending edge that is substantially coplanar with the outward-facing surface of said sidewall surface, said downward-extending edge configured such that a downward force exerted upon said upper surface or said sidewall surfaces when said rustication is engaged with said panel-forming surface tends to splay said downward-extending edge along said panel-forming surface.

A rustication for preparing reveal bands in the surface of a precast panel, said rustication defined by a one piece elongate body of extruded foam with a core section and an outer section, said outer section comprising:

• at least one upward-facing surface;
• a lower surface coupled to said at least one upward-facing surface, said lower surface defining a base plane at least a portion of which is configured to engage a panel-forming surface;
• and
• at least one downward-extending edge that projects below said base plane such that upon formation of said precast panel, said rustication exhibits enhanced sealing engagement with said panel-forming surface.

A method of manufacturing a precast panel with a reveal band formed therein, said method comprising:

• configuring a rustication to include a one piece elongate body of extruded foam, said body comprising:
• an upper surface;
• a lower surface defining a base plane at least a portion of which is configured to engage a panel-forming surface;
• a pair of laterally-spaced sidewall surfaces that join said upper and lower surfaces;
• and
• at least one downward-extending edge that projects below said base plane such that upon formation of said precast panel, said rustication exhibits enhanced sealing engagement with said panel-forming surface;
• placing said rustication on said panel-forming surface;
• pouring precast material at least around said rustication while said precast material is in an uncured state;
• curing said precast material;
• and
• removing said rustication from said precast panel.

A method of producing a rustication with a one piece elongate body of extruded foam, said method comprising:

• configuring an extruder to include an output stream defined by a predetermined shape, said predetermined shape including:
• an upper surface;
• a lower surface defining a base plane;
• a plurality of laterally-spaced sidewall surfaces that extend between said upper and lower surfaces to form corners therewith;
• and
• at least one extending edge that projects beyond said base plane;
• providing said extruder with a quantity of foamable material;
• and
• operating said extruder such that said foamable material is forced through said output stream in said predetermined shape to form said rustication.

An elongate body of extruded foam, said body defining an upper surface, a lower surface comprising a concave portion, and a pair of laterally-spaced sidewall surfaces extending between said upper and lower surfaces, wherein:

• each of said laterally-spaced sidewall surfaces terminates at a downward-extending edge defined by said concave portion of said lower surface;
• said respective downward-extending edges define a sealing edge plane;
• and
• said respective downward-extending edges and said concave portion of said lower surface define a gap between said lower surface and said sealing edge plane.