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wwxl Tile Floors August 16th, 2018 - 16:25:56
Glazed and Unglazed Tiles. Firstly. there are glazed and unglazed tiles; the glazed tiles can be cleaned very easily and do not stain as often as unglazed tiles. All you need to do is run a mop soaked in warm water with a mild detergent solution across them from time to time. The problem with glazed tiles is that they are very smooth and therefore can be quite slippery. This is dangerous. especially if the kitchen area is prone to water spillage or if there are young children in your home. To avoid this. you could choose unglazed tiles over glazed ones. Unglazed tiles will prevent the floor from being slippery and have an aesthetically pleasing textured surface. Then again. unglazed tiles will not be as durable as glazed ones - they will be relatively more prone to damage because they are not protected by that extra layer of glazing.
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.
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).
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.