Roof pitch, rafters, stair layout, trim, doors and windows.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What does roof pitch describe?
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The steepness or angle of a roof, expressed as the rise in inches for every 12 inches of horizontal run- How is roof pitch notated?
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Rise:run, such as 6:12 (rises 6 inches for every 12 inches of run)- What is a 4:12 roof pitch?
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A roof that rises 4 inches in vertical height for every 12 inches of horizontal distance- What is the minimum pitch for asphalt shingle installation?
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3:12 or steeper- What does a shallow roof pitch (2:12 or less) require?
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Special underlayment and valley treatments to prevent water backup- How do you convert a pitch ratio to an angle?
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Use trigonometry: angle equals arctan(rise/run), for example 6:12 is approximately 26.57 degrees- What is the most common residential roof pitch?
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6:12, offering a good balance between weather protection and cost- Why is steep pitch (10:12 or higher) preferred in snowy climates?
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Snow sheds off more easily and water drains faster- What is a common rafter?
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A rafter that runs from the peak (ridge) to the wall plate, carrying its share of the roof load- What is a jack rafter?
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A shortened rafter that runs from the hip or valley to the wall plate, used in hip and valley roof framing- What is a hip rafter?
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A diagonal rafter that extends from the ridge to the corner of the building at a 45-degree angle- What is a valley rafter?
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A diagonal rafter that carries water runoff where two roof planes meet at an inside corner- What is the rafter tail?
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The portion of the rafter that extends beyond the wall plate to form the overhang (soffit)- What is a bird's mouth cut on a rafter?
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A notch cut in the underside of the rafter to sit flush on the top plate, consisting of a plumb cut and a seat cut- What is the standard spacing between rafters?
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16 inches or 24 inches on center (16 o.c. or 24 o.c.)
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