Metal Roof Valley Flashing Details

Lap successive sheets of metal flashing a minimum of 12 inches and seal laps.

Metal roof valley flashing details.

Then install a non corrosive metal valley flashing of 24 minimum width. Install an underlayment centered in the roof valley. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Usually a v or w shaped metal piece is placed in the valley to channel water off your roof.

Fold the top over the roof ridge and cut the bottom along the drip edge metal. Recommended procedures of basic valley flashing installation. These items can be fabricated in many different profiles. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 156 kb 167 kb mc01a single layer underlayment 173 kb 302 kb mc01b double layer underlayment 162 kb 322 kb mc02 vent pipe flashing 144 kb 349 kb mc03 valley.

For example in metal roofing systems valleys are commonly fabricated with hems but can also be fabricated without them in which case they could still be used for metal roofing or any other type of roofing. Details concrete masonry roofing wrb flashing. Roof valley flashing specifications and details metal roof detail. At the gable edge use a gable or sidewall flashing.

A roof valley is a channel created where a roof changes direction or angles. With a clean valley you can lay down some peel and stick roofing membrane. Roof valleys are very important for a roofing system to work correctly and must be done right and taken care of to keep them in good condition. This will keep weather out prevent lifting in high winds and provide a neat finished appearance.

Nrca lile recommends that roof valley flashing metal for open roof valleys should be 26 gauge 0 45mm galvanized steel or equivalent noncorrosive nonstaining metal. Due to its adeptness to forged and actualize altered shapes correct is one in every of architecture s excellent usual substances. Next houzz dormer attics. Two ways to flash roof edges.

Roof valley flashing specifications and details. Dormer plans and ideas. One common method is to lay the edge metal under the eaves membrane and over the rake. To provide a drip edge allow an overhang of 1 to 2 inches at the eave.

Whether for slate shingle or metal roofing valley flashing adds detail and helps to direct water. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.