Home Inspector Test Home Inspector Roofing Systems and Materials 2

Question 1

What is the minimum recommended slope for asphalt shingles to prevent water infiltration?

Accepted Answer

2:12

Answer

Asphalt shingles require a minimum slope of 2:12 (2 inches of rise per 12 inches of run), though steeper slopes are preferred.

Question 2

Which type of roofing material is most commonly associated with 'cupping' as a defect?

Accepted Answer

Asphalt shingles

Answer

Cupping in asphalt shingles occurs when the edges curl upward, typically caused by moisture imbalance or improper ventilation.

Question 3

A home inspector observes granule loss concentrated near the downspouts. What does this most likely indicate?

Accepted Answer

End-of-life shingle deterioration

Answer

Heavy granule accumulation near downspouts indicates the shingles are shedding their protective coating, signaling the end of their useful life.

Question 4

What is the primary purpose of roof crickets or saddles?

Accepted Answer

To divert water around chimney bases

Answer

Crickets (saddles) are small peaked structures built behind wide chimneys to divert water around the chimney base and prevent ponding.

Question 5

When inspecting a flat roof, a home inspector finds blistering in the membrane. What is the most likely cause?

Accepted Answer

Trapped moisture or air beneath the membrane

Answer

Blistering in flat roof membranes is caused by trapped moisture or air that expands with heat, separating layers of the roofing material.

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