ggpk Tile Floors July 12th, 2018 - 17:42:54
How thick is the subfloor and what is it made of? In new construction. ¾ inch plywood or Oriented Strand Board is a standard subfloor over joists that are 16 inches on center apart. We find that is almost never enough to meet the deflection standards in most homes. Other times there is old plank flooring beneath a layer of plywood. This is a wild card. since the engineering tables usually don`t include the value for planks in their calculation. but common sense says it does add some stiffness.
Does the floor feel bouncy? If so. it is. Trust your instincts. It`s not ready for tile. A well built subfloor feels very stiff underfoot. Squeaking can also be a bad sign. but it may also solvable by screwing down the planks or plywood better into the joists.
There are formulas used in the industry to determine if the subfloor has excessive `deflection` [bounciness. lack of rigidity]. The most cited one is the Tile Council of North America standard for deflection. which is stated as L/360 as a minimum. before tile underlayment is installed. L/360 means that the floor should not bend under weight more than the length (expressed in inches) of the unsupported span divided by 360. For example. if the span between supports runs for 20 feet then the deflection should not be more than 2/3" between the center and the end. L=20 x 12" = 240". L/360 = 240"/360 or 2/3". So 2/3" is the maximum amount of movement the center of the span should be allowed to move.
The other kind of material that you might want to use for your kitchen tile flooring is linoleum. vinyl. laminate or plank. These are manufactured in different styles - and each design makes them look like a different material from what they are - with stylized textural patterns like wood or stone or marble or mosaic. They are comfortable to walk on. easy to clean. difficult to slip on and convenient to use as kitchen tile flooring. However. they do not look as authentic or as stylish as natural materials. although they are available in different styles. colors and price ranges. They are usually much cheaper than the other kind of tiling - but they require immediate cleaning of spillage because they are not stain proof. The surfaces are easy enough to clean but stains are difficult to remove and the tiling can be dented by wear and use.