Jessica Tile Floors June 11th, 2018 - 18:29:45
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.
For tile to be successful. it needs rigid support. with very little tolerance for movement. The more rigid the substrate. the better chance the tile has of remaining crack free throughout its life. Most problems with tile floors over wood come from excessive `bounciness` of the substrate. Carpet can handle some bending. vinyl tile can flex and bend a bit. hardwood floors can bend a little too. but if tile or stone is subjected to forces that push in 2 different directions at once. it doesn`t know how to bend. Instead. it cracks. first in the grout and then in the body of the tile. Consumers who have just paid thousands of dollars for a tile floor do not find these cracks appealing. to say the least.
For plywood subfloors. be sure that the wood is at least 1 and 1/8 inches thick and is supported by an equally strong underlayment. Otherwise. your ceramic tiles will dislodge easily. or worse. break and need replacing. Concrete floors are the most ideal subfloor surface to work with. But before you can start installing ceramic tile flooring over it. it must be cleaned thoroughly. For dust and other debris. sweep and then mop your concrete subfloor surface. and allow it to dry completely. Smooth concrete surfaces must be rough sanded just like vinyl floors to allow the tiling mortar some grip.
There are at least five good reasons tile surpassed linoleum as the flooring of choice: As you have just read. it is straightforward to install. You`ll be delighted with the efficiency of tile floor installation. It`s not unusual to lay a kitchen in less than one day. a bath in half that time. An expert tile contractor has fit and detail foremost in mind. and will never rush. but experience contributes efficiency to your project.