RA-07Fill the holes — the method depends on what's behind the tileOn solid brick, block, or dot-and-dab plasterboard, the hole has a solid backing, so push a two-part epoxy tile filler straight in with a filling knife, slightly overfilled. On lath and plaster, the hole is often deeper and hollow behind the lath, so pack a small twist of wire wool or newspaper a few mm in first to stop filler dropping through, then fill the last few mm with epoxy filler. On plasterboard over timber or metal studs, the cavity behind is hollow too, so use the same wire wool or a tiny offcut of card as backing before filling flush with the tile face.