CTI Surface Preparation & Adhesives

Question 1

Why is surface preparation critical before tile installation?

Accepted Answer

To ensure a clean, level, and dry substrate

Answer

Proper surface preparation ensures tile adhesion and prevents future tile failure.

Question 2

What is the purpose of a crack isolation membrane?

Accepted Answer

To prevent cracks in the tile caused by substrate movement

Answer

This membrane helps prevent cracks from the substrate from transferring to the tile surface.

Question 3

What is the most common adhesive used for tile installation?

Accepted Answer

Thinset mortar

Answer

Thinset mortar is widely used for its bonding strength and flexibility.

Question 4

Which substrate requires a primer before applying adhesive?

Accepted Answer

Gypsum board

Answer

Highly absorbent substrates like gypsum may require a primer to prevent premature drying of the adhesive.

Question 5

Why should dust be removed before adhesive application?

Accepted Answer

It promotes strong adhesion between surface and tile

Answer

Dust prevents adhesive from bonding properly to the substrate.

(CTI) Certified Tile Installer Practice Test