Floor Tile Deflection

Enter your floor joist information and then hit calculate deflection to find out your floor rating.

Floor tile deflection.

Whether you are installing stone or ceramic tile over floors and walls there s one thing to consider. Under total load for ceramic tile. 1 1 this test method is used to determine the deflection of relatively rigid resilient floor tile such as vinyl composition tile and resilient flooring with a rigid polymeric core. 1 2 the values stated in inch pound units are to be regarded as standard.

Note it gives the allowable deflection based on a fractional span quantity so a larger denominator will yield less deflection. All floors deflect or move to some extent but if. In fact failures at l 600 have been observed. Calculating deflection many tile contractors can judge a floor s deflection by walking around.

It is for this reason that recommendations for floor rigidity are not based on deflection measurements but on empirically established methods found to work over normal code construction. For example the allowable deflection of a 12ft span floor joist with plaster l 360 is 0 4 12ft divided by 360. Stone tiles may be installed with thin set methods a 14 foot maximum span is recommended by the marble. Learn more about it here.

If you have engineered truss or i beam type joists please do not use this calculator. If that same joist had gypsum ceiling l 240 the allowable deflection is 0 6. For instance ceramic tile can withstand more deflection than natural stone. How to fix floor deflection for ceramic tile.

This calculator is designed to work with dimensional lumber only. See the table below. Deflection or bounciness can cause tiles and grout to crack or come loose and the tolerance depends on what type of tile is being installed.