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kkes Tile Floors September 14th, 2018 - 05:36:47
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.
First. you have porcelain tiles. These tiles are made by firing at high temperatures. They are also very dense and moisture resistant. You can purchase porcelain in a variety of shades and colors. Porcelain tiles are the most expensive though but with them you have tile flooring ideas that can mimic stone and other materials.
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.
Tile floor installation is a clear-cut process. Once your contractor has determined your sub-floor can handle the weight and rigidity of tile. he designs a "map" so that the tile is straight. Next. adhesive is spread. and the tiles are "squished" into it. A level is used on each tile to make certain it is flush. and a rubber mallet can tamp down any spot that`s higher than the rest. Spacers are placed between tiles. until the adhesive dries them into place. Border tiles are cut to size and laid. The spaces are grouted. and when it is dry the tiles are cleaned. and sealed.