Valley Flashing On Metal Roof

Lay the flashing down in the roof valley and start at the lower end of the roof.

Valley flashing on metal roof.

How to secure metal roof valley by clips cleats or edge trapping roofing nails. Install an underlayment centered in the roof valley. When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.

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. Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies. 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. When installing metal valley flashing there are a few things to keep in mind from cutting metal roofing to sealing the flashing.

Now nail this first flashing at both its far ends. With a clean valley you can lay down some peel and stick roofing membrane. As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. W valley flashing protects the critical area of your roof where two slopes come together to form a valley.

Remember to caulk the underside of the flashing with a sealant. Attach the flashing panel in place at the bottom. First clean the debris out of the valley including sawdust nails and whatever else is in there. Whether for slate shingle or metal roofing valley flashing adds detail and helps to direct water.

How to cut metal roofing to fit valleys. Use 1 inch galvanized roofing nails. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof.

Step 6 install the flashing. Be sure to check local building codes to ensure you have the proper width for your application. Galvanized steel aluminum and copper can all be used. 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.

These items can be fabricated in many different profiles. This valley flashing material can be manufactured from any metal that will resist the effects of weather acid rain and other contaminants. Use roof valley cleats at intervals of 24 o c.