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Saturday, March 23, 2013

Put the Right Floor in the Right Place


Following is a list of various types of floors and where you can install them.

  • Solid wood floors can be installed above grade (ground level), but not below. The preferred subfloor is 3/4-inch CD grade exterior (CDZ) plywood. You can also use 3/4-inch Oriented Strand Board (OSB) underlayment, 5/8-inch CDX, or tongue-and-groove subflooring.
  • Parquet floors can be installed above grade, but not below. The preferred subfloors are 3/4-inch CDX plywood or 3/4-inch OSB. You can also apply parquet over 5/8-inch CDX or existing solid wood flooring.
  • Engineered wood can be installed above or below grade. Recommendations on use in bathrooms varies by manufacturer. This cannot be installed on moist or damp floors. If it is applied over a crawlspace, there must be at least 24 inches between the bottom of the joists and the ground.
  • Laminate floors can be installed above or below grade and over radiant heat. Recommendations on use in bathrooms varies by manufacturer. Laminate can go over almost any subfloor, including concrete slabs, ceramic tile, stone, vinyl sheet and tile, chipboard, particleboard, and terrazzo. If installed over a crawlspace, there must be at least 24 inches between the bottom of the joists and the ground.
  • Sheet vinyl can be installed above or below grade over existing sheet vinyl, linoleum, tile, new plywood, concrete, ceramic tile, or marble. Do not apply over lauan. Some plywoods are made especially to be used as underlayments for vinyl.
  • Vinyl tile is not recommended below grade. Install over smooth, single-layer vinyl floors that are firmly attached, dry concrete, and wood floors with a plywood overlay. Do not apply over lauan.
  • Ceramic and stone can be installed above or below grade and over radiant heat. Suitable subfloors include cement backerboard, or concrete. They cannot be installed over moist or damp floors.
  • Carpeting can go over almost any subfloor. If planning to use it below grade, make sure the carpet you have in mind is suitable.

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