InterNACHI Roofing Systems and Components 4

Question 1

What is the correct installation sequence for drip edge at the rake (gable) edge of a roof?

Accepted Answer

Drip edge installed over the underlayment

Answer

At rake edges, drip edge is installed over the underlayment so water is directed away from the fascia and off the roof edge correctly.

Question 2

A home inspector observes that a flat roof has significant ponding water 48 hours after rainfall. What is the concern?

Accepted Answer

Ponding can accelerate membrane deterioration and indicates inadequate drainage

Answer

Ponding water that remains 48 hours after rainfall accelerates membrane degradation and indicates poor slope or blocked drainage, both of which are reportable deficiencies.

Question 3

Which roofing material requires the installation of a solid or spaced wood deck for proper performance?

Accepted Answer

Wood shingles and shakes

Answer

Wood shingles and shakes require either solid or spaced sheathing to allow airflow beneath them for drying and to prevent moisture-related decay.

Question 4

When inspecting a metal roof, an inspector notices white, powdery deposits near fasteners. What does this indicate?

Accepted Answer

Galvanic corrosion from dissimilar metals in contact

Answer

White powdery deposits near fasteners typically indicate galvanic corrosion, which occurs when dissimilar metals are in contact in the presence of moisture.

Question 5

What is the minimum headlap required for standard 3-tab asphalt shingles?

Accepted Answer

2 inches

Answer

Standard 3-tab asphalt shingles require a minimum headlap of 2 inches to provide adequate weather protection at the overlapping joint.

(InterNACHI) International Association of Certified Home Inspectors Practice Test

(InterNACHI) International Association of Certified Home Inspectors Practice Test

InterNACHI Roofing Systems and Components 4