InterNACHI - International Association of Certified Home Inspectors Interior Components and Finishes Questions and Answers

Question 1

While inspecting a recently built home, you observe that the solid hardwood flooring on the main level is 'cupping,' with the edges of the boards being slightly higher than their centers. What is the most likely cause of this condition?

Accepted Answer

There is a moisture imbalance, with the bottom of the flooring having a higher moisture content than the top.

Answer

Hardwood floor cupping occurs when there is a moisture imbalance through the thickness of the wood. The bottom of the board absorbs more moisture than the top surface, causing it to expand and push the edges upward. This is often due to moisture from a subfloor, crawlspace, or basement. Excessive dryness typically causes gapping, not cupping.

Question 2

According to the International Residential Code (IRC), which of the following situations requires the installation of safety glazing?

Accepted Answer

Glazing in a swinging door that separates a bedroom from a hallway.

Answer

The IRC identifies specific hazardous locations where safety glazing is required to prevent injury from broken glass. Glazing in all swinging doors is considered a hazardous location and requires safety glass, such as tempered or laminated glass. The other scenarios do not meet the specific criteria for a hazardous location requiring safety glazing.

Question 3

During an interior inspection, you are evaluating a flight of stairs. You measure the height of each riser and find that the tallest riser is 7 1/2 inches and the shortest is 7 inches. According to modern building standards, what should you report?

Accepted Answer

The 1/2-inch variation between the tallest and shortest riser is a safety hazard.

Answer

Building codes, such as the IRC, specify that the greatest riser height within any flight of stairs shall not exceed the smallest by more than 3/8 inch (0.375 inches). In this case, the variation is 1/2 inch (0.5 inches), which exceeds the allowable tolerance and creates an inconsistent stepping pattern, posing a trip hazard.

Question 4

An inspector is examining the interior of an attached garage and notes that the entry door leading into the house is a standard, hollow-core interior door. Why is this a significant defect?

Accepted Answer

The door lacks the required fire-resistance rating to slow the spread of a fire from the garage to the living space.

Answer

The door between an attached garage and the living area is part of the fire separation. Building codes require this door to be a solid wood door at least 1-3/8 inches thick, a solid or honeycomb-core steel door of the same thickness, or a door with a minimum 20-minute fire rating. A hollow-core door offers minimal fire resistance and is a serious safety hazard.

Question 5

Which of the following is the most common cause for 'nail pops' appearing on interior drywall surfaces, especially in newer construction?

Accepted Answer

Shrinkage of the wood framing members as they dry out.

Answer

The most common cause of nail or screw pops is the natural drying and shrinkage of wood framing lumber after construction. As the wood shrinks, the drywall remains stationary, and the fastener head can push through the joint compound, creating a 'pop.' While other factors can contribute, lumber shrinkage is the primary reason, particularly in the first few years of a new home.

(InterNACHI) International Association of Certified Home Inspectors Practice Test

(InterNACHI) International Association of Certified Home Inspectors Practice Test

InterNACHI - International Association of Certified Home Inspectors Interior Components and Finishes Questions and Answers