Dormer Roof Ridge Detail

This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.

Dormer roof ridge detail.

Stretch the tarp out until it overlaps the roof ridge. 12 should not exceed the 15 ft. Refer to the details. This is basically a gabled dormer but the dormer roof flares out in the same way that the main roof on a house often flares out to accommodate a porch or an addition.

Include roof pitch roof geometry slope length and climatic factors such as heavy snowfall or rainfall. Intricate corbels support the overhang of the roof. Whenever possible begin trim installation at the downwind end of the roof farthest away from the source of prevailing winds to al low flashing laps to face away from wind driven rain. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley.

Rule would allow the dormer to extend within 3 ft. You don t have to understand all the technicalities of rafter cutting to build the dormer roof. Rule in total length. In general a 11 2 story house with a roof pitch of 8 in 12 or steeper is suitable for a shed dormer.

A dormer that springs from a line below the primary roof ridge clearly appears subordinate to the primary roof and is less likely to overwhelm the roofline. The preferred setback should be at least. Roof pitch is another important variable. Acquire a heavy duty tarp that is large enough to entirely cover the roof.

Collar ties rafter ties tension beams structural ridge beams. Cut a common rafter for a pattern and lay it on the drawing to check for fit. On the dormer the flared roof helps shade the windows a boon when dormers face south or west in regions where summers are hot. Of the gable end the 3 ft.

The dormer ridge roof junction requires a two part custom made flashing see figure 2 that goes under both the main and dormer roofs and over the valley flashing. Dormers add architectural interest accent and detail. For smaller buildings where the 15 ft. Valley gutter dormer roof junction a valley gutter see figures 1 and 3 collects water from the main roof and the dormer roof.

Some of these can support the roof and prevent ridge sagging and wall spreading. Snap lines for the rafters then draw in the ridge and soffit detail. Dormers added in combination such as pairs fig. The new design features can look good inside too.