Start by identifying how the existing tile is attached and whether the subfloor beneath is plywood, concrete, or another material.

Begin by removing any loose items and appliances from the laundry room so you have full access. Inspect the tile surface and tap several areas to determine if tiles are thin set over concrete, mortar over concrete, or thin set over plywood with a mesh backing, which changes removal technique. For tiles with a mesh backing and staples you will need a pry bar and flat bar to lift tiles at grout lines, then use needle-nose pliers to pull staples out of the subfloor to prevent future squeaks or unevenness. If the tile is mortared to concrete, break up tiles using a hammer and cold chisel or a small demolition hammer while wearing eye and hearing protection and a dust mask, and work in small sections to control debris. After tile removal, scrape any remaining thin set or mortar down to a smooth profile using a floor scraper or a grinder with a diamond cup wheel, taking care to avoid gouging plywood; for concrete, remove high spots and fill low spots with a polymer-modified patch. Vacuum thoroughly with a shop vacuum and wipe the subfloor with a damp mop to remove all dust and small particles because proper adhesion of backer board or uncoupling membrane requires a clean surface. Finally, install a suitable backer board or uncoupling membrane per manufacturer instructions, ensuring screw placement and joint treatment follow recommended spacing and sealing so the tile system performs over time.

Common mistakes include leaving staples or fasteners embedded which cause tiles to rock or grout to crack; remedy this by methodically locating and removing every staple and then rechecking the floor by hand for catches. Another frequent issue is inadequate dust removal and not wiping the subfloor which reduces adhesion of thin set or membranes; fix this by vacuuming then using a damp microfiber mop and allowing complete drying before proceeding. A third concern is failing to correct subfloor flatness which leads to cracked tiles or lippage; the solution is to use a straightedge, mark deviations greater than the manufacturer tolerance, and apply a feathering patch or grinding to bring the surface within acceptable limits before installing backer board.

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