Roof Valley Flashing

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.

Roof valley flashing.

Make sure to cover the gap at the bottom of the raised ridge to keep bugs and ice out. This valley has seen its better days but the critical spot carrying water past the videos roofing wrb flashing installing drip edge on a humpy old roof. Use roof valley cleats at intervals of 24 o c. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.

Cut the top layer of shingles along the chalkline. Flashing a humpy old roof valley requires a little give and take and a backup plan. Be sure to check local building codes to ensure you have the proper width for your application. Using clips permits movement in the valley as temperatures change.

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. 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. That flashing is left exposed so the roof has visible lines of metal running down the valley. Some homeowners do not like the look of open valleys while others feel the metal accentuates the roof s shape particularly if copper or painted flashing is used.

Step 2 consider your available flashing options. W valley flashing protects the critical area of your roof where two slopes come together to form a valley. Riverside provides roof valley flashing for general contractors roofers and do it yourself home owners. Install an underlayment centered in the roof valley.

Step 9 cut corners and apply cement. Get free shipping on qualified valley flashing roof flashing or buy online pick up in store today in the building materials department. Special pricing available for large quantities. Cut the bottom edge and fold it down over the drip edge.

Flashing cannot be done if these processes are not completed first. These procedures include underlayment laying of a waterproof membrane and rolling out of builder s felt. Make sure that all of the procedures preceding roof flashing are done so that you can flash the roof valley properly. 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.