Method for production of reinforced cementitious panels

A method of producing a fabric reinforced cementitious panel web suitable for cutting into fabric reinforced cementitious panels having fabric-wrapped longitudinal edges with the fabric along said edges being open and substantially free of slurry, which comprises;

• advancing a first web of pervious reinforcing fabric having an upper face, a lower face and openings therein over a first supporting member having a non-base-reactive surface with said lower face of said first web in contact with said non-base-reactive surface of said first supporting member,
• depositing cementitious slurry on said upper face of said first web as said first web is advanced across said first supporting member so that said slurry is confined to a longitudinal central section of said first web while leaving two longitudinal margin sections of said first web substantially free of slurry, said longitudinal central section being of panel width,
• spreading said slurry uniformly over said longitudinal central section of said first web in a controlled amount with a doctor means,
• assuring that both said upper face and said lower face of said longitudinal central section of said first web are coated with said slurry and that said openings therein are filled with said slurry,
• thereafter depositing said first web upon a carrier on a moving conveyor distinct from said first supporting member over which said first web has previously been advanced,
• depositing a core layer on said longitudinal central section of said first web as it is moving on said moving conveyor,
• folding each of said two longitudinal margin sections of said first web around a longitudinal edge of said core layer onto an upper face of said core layer,
• applying cementitious slurry to a second web of pervious reinforcing fabric having an upper face, a lower face and openings therein, so that both said upper face and said lower face of said second web are coated with said slurry and so that said openings therein are filled with said slurry, and
• depositing said second web on said upper face of said core layer to overlap and bond said folded over longitudinal margin sections of said first web to said upper face of said core layer,
• thereby forming a wrapped-edge fabric-reinforced cementitious panel web having longitudinal margin edges substantially open and free of slurry.