Dormer Roof Ridge Detail

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.

Dormer roof ridge detail.

On the dormer the flared roof helps shade the windows a boon when dormers face south or west in regions where summers are hot. Refer to the details. 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. Measure and cut the temporary post that supports the ridge.

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. Collar ties rafter ties tension beams structural ridge beams. You don t have to understand all the technicalities of rafter cutting to build the dormer roof. Intricate corbels support the overhang of the roof.

Valley gutter dormer roof junction a valley gutter see figures 1 and 3 collects water from the main roof and the dormer roof. Dormers added in combination such as pairs fig. Cut a common rafter for a pattern and lay it on the drawing to check for fit. The new design features can look good inside too.

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. The preferred setback should be at least. 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.

Acquire a heavy duty tarp that is large enough to entirely cover the roof. Roof pitch is another important variable. For smaller buildings where the 15 ft. Rule would allow the dormer to extend within 3 ft.

Include roof pitch roof geometry slope length and climatic factors such as heavy snowfall or rainfall. Having one or more dormers as part of a roof s structure can boost the curb appeal of a home that might otherwise be a bit bland. 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. 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.

5 affix the tarp to the roof screwing a 2 by 4 5 08 by 10 16 cm over it. Rule in total length. Dormers add architectural interest accent and detail. 12 should not exceed the 15 ft.