How to Lay 24x24 Porcelain Rectified Tiles


Porcelain rectified floor tiles are extremely hard and dense, which allows them to be formed in large tile sizes such as 24 by 24 inches. While rectified tiles have clean edges, which make for a tighter installation, these larger tiles have some quirks during installation that need to be addressed to ensure a level layout. Large format tiles must be beat into the mortar bed to avoid lipping, or rising of the corners of the tiles. Since a large tile cannot flex or bend, it must be set flat in the mortar bed to avoid these problems.

Things You'll Need

  • Tile wet saw
  • Large toothed trowel
  • Thin set mortar
  • Wooden mallet
  • Grout
  • Grout float
  • Damp sponge
  • Lay out the tiles where you will install them but without mortar. Large tiles have fewer grout lines, fewer cuts and less room for error than smaller tiles, so a dry layout is crucial. Set the first tile in the center of the wall in the back of the room, and move outward from there. Rectified tiles have extremely clean edges, so you can use very small grout joints of 1/16 inch or smaller when laying the tiles.

  • Cut the tiles to fit the edges of the room on a tile wet saw. Move the tile slowly through the saw to ensure a straight, even cut, and double check the size of the tiles before continuing.

  • Take the tiles up from the floor and spread a small amount of thin-set mortar onto the area that will be tiled. Use a large toothed trowel to create deep grooves in the mortar; the larger grooves are crucial for forming a vacuum for the tile to be held.

  • Press each tile firmly into the thin-set mortar and beat it flat on all edges with a wooden mallet. Check to make sure that each tile is at the same level as the next tile and no corners are sticking up above the others. Beat the tile down if this occurs and let the tile mortar dry overnight.

  • Grout the tiles by spreading the grout over the joints with a grouting float. Push the grout from several angles to ensure good coverage in the joints, and wipe the surface of the porcelain clean with a damp sponge.

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  • Photo Credit Tiled floor image by Simon Amberly from
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