Posted on April 13, 2023October 2, 2023 by Kilnshelf.com Do I Need to Flip ADVANCER® Shelves? No. ADVANCER® shelves will not warp under typical pottery firing conditions even after repeated firings to cone 12 under heavy loads. Post navigationPrevious post: Can I Fire Damp Pots or Pots With Wet Glaze on ADVANCER® Shelves?Next post: Is It Better to Use a Four Point Stacking System With ADVANCER® Shelves?