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.
Roof valley flashing detail.
Special pricing available for large quantities.
Details roofing wrb flashing storm proof roof 2.
One of the details that varies between homes is the method of flashing the valley areas of the roof.
Using clips permits movement in the valley as temperatures change.
Extend entire width of flashing completely to the bottom of the roof valley.
Riverside provides roof valley flashing for general contractors roofers and do it yourself home owners.
Cut bottom of flashing so the entire width of the valley flashing extends approximately 1 2 to 3 4 over the fascia trim board along eaves the following photos illustrate removal and replacement of a closed cut valley with new open metal valley.
Cut the bottom edge and fold it down over the drip edge.
At the end of the vertical sidewall the step flashing shall be turned out in a manner that directs water away from the wall and onto the roof and or gutter.
Edge flashing and starter strip roofs peel off from the edges so it is critical to hold them tight with the roof deck sealed on the outside we turn to flashing the edges with metal and membranes metal drip edge flashing details roofing wrb flashing.
To understand what makes a valley either closed or open it is important to understand how a valley is constructed.
Be sure to check local building codes to ensure you have the proper width for your application.
An open valley relies on metal flashing for protection.
Overview w valley flashing protects the critical area of your roof where two slopes come together to form a valley.
Flashing against a vertical sidewall shall be by the step flashing method.
W type valley flashing is more rigid for handling so it stays straight and it stops waler rushing down one side of a roof from rushing back up the other side.
There are two common methods for completing the flashing of a valley in a shingle roof system.
Closed valley s or open valleys.
That flashing is left exposed so the roof has visible lines of metal running down the valley.
Make sure to cover the gap at the bottom of the raised ridge to keep bugs and ice out.
When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter.
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.
The flashing shall be a minimum of 4 inches 102 mm high and 4 inches 102 mm wide.
