Home Inspection Flashcard #180
What's Your Call?
What does the white staining below the vent of this two-story house imply?
a. Electrolysis de-zincification of the low-quality galvanized vent is occurring (notice the difference in color compared to other vents).
b. The asphalt shingles have a fairly uniform coating of algae.
c. A white sealant applied to help prevent roof leakage is being dissolved by roof drainage.
d. There is a moisture problem caused by combustion appliance exhaust venting.
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