ggpk Tile Floors July 25th, 2018 - 08:13:48
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 need for repair is rare. but it`s easy to have damaged tile replaced. Ceramic is strong. but it has been known to break when significant weight is accidentally dropped on it. Replacement is as simple as removing broken pieces. laying replacement tile. adding new grout to the area. and perhaps new sealant. Keep a few tiles around so that they match if needed. The occasional wipe or mop begins and ends the care-free maintenance of ceramic tile. The sealant that was applied during tile floor installation made it impervious to water and stain. Ceramic tile comes as close to requiring no upkeep as any flooring available. Of course. tile needs regular cleaning. Because it is impenetrable to water. tile patios and utility spaces can literally be hosed down. You only need standard off-the-shelf cleaning products.
Ceramic Tile Flooring - Remodeling Over Wood Subfloors. Before you can install a ceramic tile or stone floor. you need to know if the subfloor is even capable of supporting tile. Simply put. tile can be a durable. low maintenance. beautiful floor choice...if it`s on a solid substrate. Or it can be an expensive mistake that cracks. breaks and requires multiple repairs that may never work if the subfloor is not prepared correctly. What factors do you need to look out for to decide if tile is right for your project. and what steps can be taken to insure a trouble free installation?
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.