We warrant all of our Ceramic Mosaic Art mosaics against manufacturing defects for the lifetime of the installation. When your order arrives, inspect the outer packaging for obvious shipping damage. Open the outer packaging and inspect the inter package for damage. Remove the mosaic from the inter package. If out any time during this process you find any damage, please take a photo and send it to us. Depending on the damage, we will either replace the damaged piece(s) or replace the entire mosaic without any additional cost to you.