InterNACHI - International Association of Certified Home Inspectors Roofing Systems and Components Questions and Answers

Question 1

During a roof inspection, you observe a chimney on a sloped roof that is 36 inches wide.
What component should be present to properly divert water around the chimney, especially in climates with snow and ice?

Accepted Answer

A cricket or saddle

Answer

A secondary headwall flashing

Answer

An extra layer of underlayment

Answer

A dedicated gutter system

Question 2

Which of the following attic ventilation systems relies on wind and natural convection (the principle that hot air rises) to function, without mechanical assistance?

Accepted Answer

Ridge and soffit vents

Answer

Powered attic ventilators

Answer

Solar-powered attic fans

Answer

Whole-house fans

Question 3

According to most manufacturers and building codes, what is the absolute minimum slope on which standard asphalt shingles can be installed, provided special underlayment techniques are used?

Accepted Answer

2:12

Answer

4:12

Answer

3:12

Answer

1:12

Question 4

A home inspector is examining a low-slope roof with a modified bitumen covering. The inspector notes several areas of 'ponding water.' According to the National Roofing Contractors Association (NRCA), ponding water is generally considered a potential issue if it remains on the roof for more than how long after a rain event?

Accepted Answer

48 hours

Answer

12 hours

Answer

24 hours

Answer

72 hours

Question 5

While inspecting the junction of a roof plane and a vertical sidewall, an inspector should look for which type of flashing to be interwoven with the shingle courses?

Accepted Answer

Step flashing

Answer

Valley flashing

Answer

Drip edge

Answer

Counter-flashing

Question 6

Which of the following is NOT a primary component that an inspector is required to inspect as part of the roofing system according to the InterNACHI Standards of Practice?

Accepted Answer

Interior of the chimney flue

Answer

Roof covering materials

Answer

Gutters and downspouts

Answer

Vents, flashings, and skylights