Glencoe: Section 67 Flashcards
Most complicated frame carpentry in a house
Roof framing because of all the angles involved
When does roof framing begin?
After house walls have been framed.
Nominal X” lumber is used for roof framing but Y is increasingly common
Nominal 2” lumber
I-joist
Using an I-joist requires the same basic understanding of X
rafter layout and roof design.
Main purpose of a roof
protect house from weather with minimum maintenance
Two common roof styles:
The other common roof styles:
Gable roof and hip roof
Gabel, hip, low-slope, and shed
Gable roof:
Gable roof has two sloping sides that meet at the top to form a gable at each end.
Gable:
Triangular wall enclosed by the sloping ends of the roof
A gable roof might include dormers.
Dormers:
upright window projections that add light and ventilation to the second floor rooms or the attic
The most common roof type
Gable
Hip roof:
Slopes at the ends of the building as well as the two sides. The slope on all sides results in an even overhang all around the building and gives a low appearance.
In hip roof, why are maintenance needs reduced?
Because there is no siding above the overhang.
This style of roof is very strong and is often found in regions where severe storms are common:
Hip roof
Low-Slope roof:
(float roof) is not perfectly flat. Instead the rafters are laid at a light angle to encourage water drain
Rafter:
an inclined framing member that supports the roof.
Roof Styles: Low slope roof: ----------------- Sheathing and roofing are applied on X. The ceiling material is applied to the Y.
top of the rafters
underside of the rafters
This type of roof is mostly found in dry climates
Low-Slope roof
Shed roof:
(lean-to roof) shed roof slopes in one direction only.
A shed roof is often used for an X
addition to an existing structure. In this case the roof may be attached to the side of structure of to the roof.
Benefit for shed roofs
cost effective
Gambrel roof:
Variation of gable roof. Steep slope on two sides.
A second slope begins partway up and continues to the top.
Gambrel roofs are commonly used in
barns.
Benefits of gambrel roof:
More useable attic space than a typical gable or hip roof. This space can also be used a second floor
Mansard roof:
Variation of hip roof. It has steep slopes on all four sides. Partway up, a shallow second slope is developed and continues to the top where it meets the slopes from the othersides.
