Under ANSI Z765-2021, as Fannie Mae requires for a detached house, where are exterior dimensions taken on a brick-veneer wall?
Correct Answer
D) At the outside face of the brick veneer
For detached houses, ANSI Z765-2021 measures to the exterior finished surface of the outside walls. With brick veneer, that is the outside face of the brick, not the hidden sheathing or framing. Interior measurements are used for attached units such as condos in some contexts, and the foundation line does not govern.
Why This Is the Correct Answer
Option D is correct because ANSI Z765-2021 measures detached houses to the exterior finished surface of the outside walls. With brick veneer, the finished surface is the outside face of the brick. The hidden sheathing, the interior drywall and the foundation line are not the measuring points for a detached house.
Why the Other Options Are Wrong
Option A: At the outside face of the wall sheathing
Option A uses the outside face of the wall sheathing. Sheathing sits behind the brick veneer and is not the finished exterior surface, so measuring there understates the house.
Option B: At the inside face of the interior drywall
Option B uses the inside face of the interior drywall. Interior measurement is used for some attached units such as condominiums, not for the exterior dimensions of a detached house.
Option C: At the outside face of the foundation wall
Option C uses the outside face of the foundation wall. The foundation line does not govern; the standard measures to the finished exterior surface of the walls, which for this house is the brick.
Measure what you can touch
For a detached house, put the tape on the finished outside surface you can actually touch, which on a brick home is the brick.
How to use: Use this when an exam asks where to take exterior measurements on a detached home.
Exam Tip
For detached houses, think exterior finished surface; for brick veneer, that means the outside of the brick.
Common Mistakes to Avoid
- -Measuring to the framing or sheathing behind the veneer
- -Using interior measurements for a detached house
- -Measuring along the foundation instead of the finished wall surface
Concept Deep Dive
Analysis
This question tests the ANSI Z765-2021 measuring rule for detached houses, which Fannie Mae requires. Detached houses are measured to the exterior finished surface of the outside walls. On a brick-veneer house, the finished exterior surface is the outside face of the brick, so that is where dimensions are taken.
Background Knowledge
ANSI Z765 is a national standard for measuring and calculating residential square footage. For detached homes, it uses exterior dimensions at the finished surface of the outside walls, while attached units in some contexts are measured from the interior. Consistent measuring rules help make the subject and comparables more comparable.
Real-World Application
An appraiser measures a brick-veneer ranch home and runs the tape along the face of the brick at each corner. The resulting area is slightly larger than a builder plan that used framing dimensions. The appraiser reports the area under the ANSI method required for the assignment.
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