CHI CHI Roofing Systems Inspection

Question 1

When inspecting an asphalt shingle roof, which defect indicates the shingles have reached the end of their service life?

Accepted Answer

Cupping, curling, or clawing of the shingle tabs

Answer

Minor granule loss in gutters during initial installation

Answer

Slight color variation between shingle rows

Answer

Nail heads that are slightly visible at the shingle surface

Question 2

A home inspector identifies open step flashing where a roof plane meets a sidewall. What is the primary risk of this deficiency?

Accepted Answer

Water infiltration into the wall assembly and interior

Answer

Accelerated granule loss on adjacent shingles

Answer

Premature oxidation of the roofing fasteners

Answer

Reduced wind uplift resistance of the roof covering

Question 3

What is the minimum roof slope typically required for standard three-tab asphalt shingles to be installed without special underlayment modifications?

Accepted Answer

3:12

Answer

1:12

Answer

2:12

Answer

4:12

Question 4

During a roof inspection, the home inspector observes black streaking running down the shingles. What is the most likely cause?

Accepted Answer

Algae (Gloeocapsa magma) growth

Answer

Oil bleeding from the asphalt matrix

Answer

Oxidation of the zinc strips at the ridge

Answer

Chimney tar deposits washing down in rain

Question 5

Which type of underlayment is required by most US building codes in the first 24 inches from the eave on roofs in cold climates?

Accepted Answer

Ice and water shield (self-adhering membrane)

Answer

15-lb felt paper

Answer

30-lb felt paper

Answer

Synthetic non-woven polypropylene underlayment

Question 6

A home inspector finds that a roof valley is using the 'open valley' method with metal flashing. What minimum width of exposed metal is generally recommended for proper function?

Accepted Answer

6 inches total (3 inches per side)

Answer

2 inches total (1 inch per side)

Answer

12 inches total (6 inches per side)

Answer

18 inches total (9 inches per side)