ggpk Tile Floors July 12th, 2018 - 17:43:00
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.
Is there an unfinished ceiling below to look up and measure the distance between joists and the condition of the wood below and how long the unsupported span is? A few minutes in the basement with a flashlight and tape measure can let you know if you have a winner (thick and deep joists. spaced closely together. in good condition. with a narrow span). or a loser (thin and shallow joists. irregularly spaced or spaced far apart. in bad condition. with a long span).
Can you cut into the layers on top to get a cross section of the existing floor? If there is a heating grate that you can remove. that may show the layers the floor is composed of. What will be reassuring to see is a thick layer. ideally over 1 ½ inches thick of plywood. Alternatively. with the property owner`s permission. we sometimes cut in to it to check what it`s composed of.
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.