CBD Materials & Techniques 2

Question 1

Which grout type is most resistant to staining and moisture in a shower environment?

Accepted Answer

Epoxy grout

Answer

Epoxy grout is non-porous, making it highly resistant to stains and moisture without needing sealing.

Question 2

What is the recommended maximum tile size for a wet shower floor to maintain slip resistance?

Accepted Answer

12x12 inches

Answer

Tiles 12x12 inches or smaller are recommended for shower floors because more grout lines improve slip resistance.

Question 3

Which countertop material requires annual sealing to prevent staining in bathroom applications?

Accepted Answer

Natural granite

Answer

Natural granite is porous and requires periodic sealing to prevent moisture and stain penetration.

Question 4

What does the term 'back-buttering' refer to in tile installation?

Accepted Answer

Applying mortar to the back of a tile before setting

Answer

Back-buttering involves applying thin-set mortar to the back of the tile to improve bond and coverage.

Question 5

Which underlayment material is best suited as a tile substrate in wet bathroom areas?

Accepted Answer

Cement backer board

Answer

Cement backer board is dimensionally stable and will not swell or deteriorate when exposed to moisture.

(CBD) Certified Bathroom Designer Practice Test