Interior Components and Finishes Flashcards

Which interior finish material is most commonly used as a tile backer in wet areas and is resistant to moisture damage?

Answer: Cement board (cementitious backer unit)

Cement board (cementitious backer unit) is the preferred tile substrate in wet areas because it does not swell, deteriorate, or support mold growth when exposed to moisture.

What defect is indicated when a wood floor shows cupping — edges higher than the center of each board?

Answer: Moisture is present on the underside of the flooring, causing the bottom to expand more than the top

Cupping in hardwood flooring is caused by higher moisture content on the bottom of the boards than the top, causing the bottom to expand and the edges to lift.

During an inspection, a home's interior doors do not latch properly and several stick in their frames. The house is 40 years old. What is the most important distinction an inspector must make?

Answer: Whether the cause is normal settling/humidity or active structural movement

The inspector must determine whether sticking doors reflect benign seasonal swelling or past settling versus active, ongoing structural movement that requires further evaluation.

A home inspector observes popcorn (acoustical) ceiling texture applied prior to 1980. What additional concern should be noted?

Answer: The texture may contain asbestos and should be tested before disturbance

Popcorn ceiling textures applied before approximately 1978–1980 may contain asbestos, which poses a health hazard if disturbed; testing is recommended prior to any renovation.

What is the recommended clearance between the bottom of an interior door and a finished floor to allow adequate air circulation for HVAC return air?

Answer: Approximately ½ to ¾ inch

An undercut of approximately ½ to ¾ inch beneath interior doors allows return air to circulate back to the HVAC system when supply vents are in individual rooms.

An inspector finds that a basement has been finished with framing and drywall directly against the exterior concrete walls with no insulation or air gap. What primary problem does this create?

Answer: It promotes condensation and mold on the cold concrete behind the drywall

Framing drywall directly against cold concrete without insulation or an air gap allows warm interior air to condense on the cold concrete, promoting mold growth behind the finish wall.

Which of the following stair defects represents the most significant trip-and-fall hazard according to home inspection standards?

Answer: Inconsistent riser heights varying by more than 3/8 inch

Inconsistent riser heights exceeding 3/8 inch are a leading cause of stair falls because the body's muscle memory is disrupted mid-stair, causing missteps.