Metal Roof Valley Flashing Detail

Valley flashing valley flashing protects the middle section where two roof sections meet and it directs rainwater runoff away from the roof.

Metal roof valley flashing detail.

Riverside provides roof valley flashing for general contractors roofers and do it yourself home owners. Then install a non corrosive metal valley flashing of 24 minimum width lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Be sure to check local building codes to ensure you have the proper width for your application. Galvanized black charcoal coffee cocoa commercial brown white and grey w valley available on request.

Special pricing available for large quantities. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. 12 x 12 135 degree 015 material thickness available in. Using clips permits movement in the valley as temperatures change.

Use roof valley cleats at intervals of 24 o c. Dealing with dips and making clean overlaps metal drip edge flashing is installed on the perimeter of a roof to direct water away from the fascia into the gutters and to keep wind blown rain image. Valley flashings are custom fabricated to any measurements and angles and usually measure 10 in length but can also be we can also match any profile. Install an underlayment centered in the roof valley.

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. Overview w valley flashing protects the critical area of your roof where two slopes come together to form a valley. When installing metal valley flashing there are a few things to keep in mind from cutting metal roofing to sealing the flashing. When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter.

The installer fabricates simple clips or valley flashing cleats whose bent edge interlocks with the folded over or hemmed edges of the metal roof valley flashing to secure the valley to the roof deck. Factors that influence flashing size shape and endlap requirements include roof pitch roof geometry slope length and climatic factors such as heavy snowfall or rainfall. Fold the top over the roof ridge and cut the bottom along the drip edge metal. With a clean valley you can lay down some peel and stick roofing membrane.

Some roof conditions such as valleys may require a longer endlap and or a larger flashing to properly drain moisture from the roof.