Split Pitch Roof Framing

Screened porch with a shed roof.

Split pitch roof framing.

If the unit of rise in inches is 3 then the cut is the unit of rise and the unit of run 12 inches or 3 12. A mansard roof which is also used on porches is a hip roof variation and is ideal for two story houses with window placements incapable of having a gable roof or continuous shed. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. A detached type of roof is easier to build because the framing and matching of roof pitches in the house is easier to install.

It is also easier to insulate a roof with a greater pitch. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches. The total rise is 12 inches or 1 foot and the span is 4 feet so the pitch would be 1 4 or a quarter pitch roof.

Figure 2 2 roof framing terms. This design is more suitable for smaller houses. The minimum roof pitch is 1 8 inch rise per foot of span. Explore framing complexities that result when roofs of two different pitches intersect.

Screened porch with shed roof is 13 000. The greater the roof s pitch the better it will shed snow ice and rain. A 4 12 pitch roof is attached to the roof of your house. The plan costs 70 and the cost to build for a 12 ft.

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. Line length is the hyptenuse of the triangle whose. Keep in mind the rafter approach can take several days and up to 3 weeks to complete a suitable frame. If going the non trussed route for a moderate to low pitched roof the rate per square foot of framing including labor is a range of 11 to 22.

How to precisely layout an split pitch hip roof rafter using rafter tools for iphone. A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. It will display the framing square usage for the square tail fascia hip rafter miter angle of 12 98849 2 3 4 12.