Metal Roof Valley Flashing Detail

Recommended procedures of basic valley flashing installation.

Metal roof valley flashing detail. Metal valley trim also known as metal valley flashing is beneficial because it drains water away from the structure of your metal building which helps prevent moisture damage. Special pricing available for large quantities. When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter. When installing metal valley flashing there are a few things to keep in mind from cutting metal roofing to sealing the flashing.

Valley flashing valley flashing protects the middle section where two roof sections meet and it directs rainwater runoff away from the roof. Some roof conditions such as valleys may require a longer endlap and or a larger flashing to properly drain moisture from the roof. 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. Install an underlayment centered in the roof valley.

How to cut metal roofing to fit valleys. 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. 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. Galvanized black charcoal coffee cocoa commercial brown white and grey w valley available on request.

Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Overview w valley flashing protects the critical area of your roof where two slopes come together to form a valley. 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. Riverside provides roof valley flashing for general contractors roofers and do it yourself home owners.

12 x 12 135 degree 015 material thickness available in. With a clean valley you can lay down some peel and stick roofing membrane. 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.

Using clips permits movement in the valley as temperatures change.