10mm gap between the top of the each joint will allow for the
expansion and be sealed with polyurethane chaulking material.
Marking of each product is as follow:
XXYY-Date where XX is Piece Number by position, YY is Nr. Starting grid line Q for GRC
Fin as Nr.1 and GRC Flat Panel Nr. Starting grid line A, and Date is production date. Please see
production record for reference.