Install an underlayment centered in the roof valley.
Valley flashing on metal roof.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
Use roof valley cleats at intervals of 24 o c.
This valley flashing material can be manufactured from any metal that will resist the effects of weather acid rain and other contaminants.
Make sure that the end of the flashing panel is perfectly in line with the edge of the roof.
For example in metal roofing systems valleys are commonly fabricated with hems but can also be fabricated without them in which case they could still be used for metal roofing or any other type of roofing.
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.
When installing metal valley flashing there are a few things to keep in mind from cutting metal roofing to sealing the flashing.
Step 6 install the flashing.
These items can be fabricated in many different profiles.
Whether for slate shingle or metal roofing valley flashing adds detail and helps to direct water.
Remember to caulk the underside of the flashing with a sealant.
W valley flashing protects the critical area of your roof where two slopes come together to form a valley.
With a clean valley you can lay down some peel and stick roofing membrane.
When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter.
Galvanized steel aluminum and copper can all be used.
Attach the flashing panel in place at the bottom.
Use 1 inch galvanized roofing nails.
Now nail this first flashing at both its far ends.
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.
Lay the flashing down in the roof valley and start at the lower end of the roof.
How to secure metal roof valley by clips cleats or edge trapping roofing nails.
As the asphalt shingles are installed over the roof deck the shingles are extended into the valley.
Be sure to check local building codes to ensure you have the proper width for your application.
Install valley battens on both ends of the roof valley then attach first flashing 3 4 inches over the roof flange and another 3 4 inches over the fascia if any is present.
Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.
First clean the debris out of the valley including sawdust nails and whatever else is in there.
How to cut metal roofing to fit valleys.
