ASHI Attics & Crawl Spaces

Question 1

According to ASHI Standards of Practice, what is the minimum access opening size required for an inspector to enter an attic?

Accepted Answer

16 inches by 24 inches

Answer

ASHI Standards require an attic access opening of at least 16 inches by 24 inches for the inspector to enter.

Question 2

Which condition most commonly indicates inadequate attic ventilation?

Accepted Answer

Staining or moisture damage on the underside of roof sheathing

Answer

Staining or moisture on roof sheathing indicates condensation from warm, moist air accumulating due to poor ventilation.

Question 3

What is the recommended minimum depth of attic insulation (R-value) for most US climate zones per current energy standards?

Accepted Answer

R-38 to R-49 (10–12 inches of blown insulation)

Answer

Current energy codes recommend R-38 to R-49 in most US climate zones, typically achieved with 10–12 inches of blown insulation.

Question 4

An ASHI inspector observes that bathroom exhaust fans terminate in the attic space rather than at the exterior. This is considered:

Accepted Answer

A deficiency that introduces moisture into the attic

Answer

Exhaust fans must terminate at the exterior; terminating in the attic introduces moisture that can cause mold and structural damage.

Question 5

When inspecting a crawl space, which of the following ground cover conditions should an inspector report as a deficiency?

Accepted Answer

Bare soil with no vapor retarder installed

Answer

Bare soil in a crawl space allows ground moisture to evaporate into the space, causing wood decay, mold, and high humidity.

(ASHI) ASHI Certified Home Inspector Practice Test