Finish TradesQuestion 227 of 700
For a wet area like a shower, industry standards limit allowable framing/subfloor deflection so tile does not crack. A common maximum for ceramic tile is about L/360, but NATURAL STONE typically requires a stiffer floor of about:
a.L/180
b.L/240
c.L/300
d.L/720
Explanation
Natural stone is more brittle and crack-prone than ceramic tile, so it needs a stiffer assembly, commonly limited to about L/720 deflection versus L/360 for ceramic. The looser limits (L/180, L/240, L/300) allow too much movement and can crack stone.
Practice all 700 questions free — no signup required.
Related questions on this topic
- Before hanging vinyl wallcovering on new, primed drywall, why is a wallcovering primer/sizing typically applied?
- A tile setter spreads thinset mortar but leaves it too long before placing tile, and a skin forms on the ridges. What is the MAIN risk of setting tile into skinned-over thinset?
- An uncoupling (crack-isolation) membrane is installed between a concrete slab and ceramic tile. Its PRIMARY purpose is to:
- Interior tile floors need periodic movement (expansion) joints. Industry guidance commonly recommends interior movement joints roughly every ____, and MORE frequently for floors exposed to sunlight or moisture.
- A shower receptor will use a liquid-applied waterproofing membrane over the tile backer. The MOST important installer control for a reliable waterproof layer is to:
- A tile order calls for covering a floor of 240 square feet. The chosen tile comes in boxes that each cover 11 square feet. Adding about 10% for cuts and waste, how many full boxes should be ordered?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB General Building (B) Trade Examination · How we review