ASHI Interiors, Insulation & Ventilation 5 — Questions and Answers
Question 1: An inspector notices that a garage ceiling below a living space has no drywall and the floor above is insulated with batts. What is the PRIMARY deficiency?
- Missing drywall eliminates the required fire separation between garage and living space (Correct answer)
- The insulation will absorb vehicle exhaust fumes and become ineffective
- Batts are not an approved insulation type for garage ceiling applications
- The garage ceiling height is insufficient for code compliance
Correct answer: Missing drywall eliminates the required fire separation between garage and living space
A garage attached to the living space requires a minimum 1/2-inch drywall fire separation on the ceiling to slow fire spread; missing drywall eliminates this critical barrier.
Question 2: Which observation would lead an ASHI inspector to suspect ice dam formation potential on a roof?
- South-facing roof slope with minimal snow accumulation
- Icicles forming at eaves combined with bare roof deck above a heated space (Correct answer)
- Roof ventilators installed near the ridge only
- Metal roofing material installed over existing shingles
Correct answer: Icicles forming at eaves combined with bare roof deck above a heated space
Icicles at eaves combined with a bare (snowmelt) roof over heated space indicate heat escaping through the roof deck, melting snow that refreezes at the cold eave overhang — the classic ice dam condition.
Question 3: A home inspector observes that spray foam insulation has been applied to the underside of roof sheathing in an unvented attic assembly. What must the inspector verify?
- The foam is white to reflect radiant heat properly
- Sufficient R-value is achieved and a thermal or ignition barrier covers the foam where required (Correct answer)
- Ridge vents are still present to supplement the foam insulation
- The foam does not contact any electrical wiring in the attic
Correct answer: Sufficient R-value is achieved and a thermal or ignition barrier covers the foam where required
Spray polyurethane foam is combustible and must be covered with an approved thermal or ignition barrier (typically 1/2-inch drywall) in accessible spaces, and sufficient R-value must be achieved for the climate zone.
Question 4: An inspector finds that a finished basement has no visible smoke detectors. According to typical US codes and ASHI standards, what should the inspector report?
- No deficiency; basements are exempt from smoke detector requirements
- Missing smoke detector; sleeping and habitable basement spaces require smoke alarms (Correct answer)
- A carbon monoxide detector substitutes for a smoke detector in basements
- Only heat detectors are required in basement areas near mechanical equipment
Correct answer: Missing smoke detector; sleeping and habitable basement spaces require smoke alarms
US building codes and ASHI standards require smoke alarms in all habitable rooms and on every level of the home including basements, so finished basement spaces without detectors represent a safety deficiency.
Question 5: What is the purpose of a radon rough-in during new construction, and how would an inspector identify it?
- A pipe in the slab connected to an active fan that continuously exhausts radon
- A capped PVC pipe extending through the slab for future connection to an exhaust fan if radon mitigation is needed (Correct answer)
- A vapor retarder under the slab that blocks radon gas migration
- A sealed membrane applied to all below-grade walls to prevent radon entry
Correct answer: A capped PVC pipe extending through the slab for future connection to an exhaust fan if radon mitigation is needed
A radon rough-in is a capped sub-slab PVC pipe that allows easy future installation of an active radon mitigation fan without breaking the slab, and is identified as a capped pipe penetrating the floor.
Question 6: During inspection of a 1960s-era home, an inspector finds vermiculite insulation in the attic. What is the CORRECT course of action?
- Remove a sample and test it on-site with a home test kit
- Note its presence, advise the client to assume it may contain asbestos, and recommend professional testing (Correct answer)
- Remove the insulation immediately as it is a known health hazard
- Report it only if the insulation appears disturbed or damaged
Correct answer: Note its presence, advise the client to assume it may contain asbestos, and recommend professional testing
ASHI standards require inspectors to note vermiculite's presence and recommend that clients treat it as potentially asbestos-containing until tested by a qualified environmental professional, without disturbing it.
Question 7: An inspector finds that the living room has a popcorn (acoustic) ceiling installed before 1978. What should the report include?
- Require removal before the home can be sold
- Note that pre-1978 textured ceilings may contain asbestos and recommend testing before any disturbance or removal (Correct answer)
- Classify it as a cosmetic defect with no health implications
- Report it only if the texture is visibly deteriorating and releasing fibers
Correct answer: Note that pre-1978 textured ceilings may contain asbestos and recommend testing before any disturbance or removal
Popcorn ceilings installed before 1978 may contain asbestos; ASHI inspectors should note the age, advise clients of the potential hazard, and recommend professional testing before any renovation or removal.
ASHI Interiors, Insulation & Ventilation 5
An inspector notices that a garage ceiling below a living space has no drywall and the floor above is insulated with batts.
What is the PRIMARY deficiency?