CFI Tile & Stone Installation 5

Question 1

When installing large stone slabs with significant veining (like marble), what layout practice is recommended for the best aesthetic result?

Accepted Answer

Bookmatching or sequential numbering from the same slab lot

Answer

Bookmatching or sequential layout from the same lot ensures continuous veining patterns and consistent appearance across the installation.

Question 2

What is the purpose of movement joints (expansion joints) in a tile installation?

Accepted Answer

To accommodate differential movement between the tile assembly and substrate

Answer

Movement joints accommodate thermal expansion, contraction, and structural movement to prevent tile cracking and debonding.

Question 3

According to TCNA guidelines, how often should interior movement joints be placed in a tile installation?

Accepted Answer

Every 8 to 12 feet in each direction

Answer

TCNA EJ171 recommends interior movement joints every 8 to 12 feet in each direction in field tile areas.

Question 4

What tool is used to check that a tile floor layout line is perfectly square at the starting point?

Accepted Answer

3-4-5 triangle method or framing square

Answer

The 3-4-5 triangle method or a framing square verifies that layout lines are at true 90-degree angles before tiling begins.

Question 5

When cutting porcelain tile with a wet saw, what causes the most common blade binding or chipping?

Accepted Answer

Feeding the tile too quickly through the blade

Answer

Feeding tile too fast prevents the diamond blade from cutting cleanly, causing chipping, blade binding, and premature wear.

(CFI) Certified Flooring Installer Practice Test