On a simple rectangular building plan, how does a conventional hip roof differ from a gable roof?
Correct Answer
A) Slopes on all four sides with no vertical end walls
On a simple rectangular plan, a hip roof slopes on each side without vertical gable end walls. A gable roof has vertical end walls under its sloping roof surfaces. Geometry alone does not establish roof-covering suitability, structural adequacy or code compliance.
Why This Is the Correct Answer
Option A is correct because a conventional hip roof on a rectangular plan slopes on all four sides and has no vertical gable end walls. A gable roof, by contrast, has two sloping surfaces meeting at a ridge with vertical triangular walls at each end. The difference is one of geometry.
Why the Other Options Are Wrong
Option B: Has two flat triangular ends rising to a straight ridge
Option B, two flat triangular ends rising to a straight ridge, describes a gable roof, not a hip roof. The question asks how a hip roof differs from a gable roof.
Option C: Cannot support composition shingles
Option C says a hip roof cannot support composition shingles. Roof shape does not by itself determine whether a roof covering is suitable, and hip roofs are commonly covered with composition shingles.
Option D: Requires no rafters or trusses
Option D says a hip roof requires no rafters or trusses. A hip roof still needs a structural frame of rafters or trusses to support it.
Hip slopes all around
A hip roof slopes down on all four sides like hips curving away; a gable roof has flat triangle ends like a house drawn by a child.
How to use: Use this image to tell hip roofs from gable roofs on exam questions.
Exam Tip
Roof style questions are about shape. Be cautious of options that claim a roof style cannot use a material or needs no framing.
Common Mistakes to Avoid
- -Reversing the descriptions of hip and gable roofs
- -Assuming roof style limits the roofing material
Concept Deep Dive
Analysis
This question tests basic roof geometry. On a simple rectangular plan, a hip roof slopes down on all four sides, while a gable roof has two sloping planes with vertical triangular end walls. The distractors make unsupported claims about roofing materials and structure.
Background Knowledge
Common roof styles include gable, hip, shed, gambrel and mansard. Roof style is identified by the shape and number of sloping planes. Structural adequacy, covering suitability and code compliance depend on design and materials, not geometry alone.
Real-World Application
An appraiser describing a ranch house notes that it has a hip roof with composition shingles, while two comparables have gable roofs. She considers whether buyers in the area show any preference before deciding if an adjustment is needed.
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