Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.
Metal roof valley flashing.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
First clean the debris out of the valley including sawdust nails and whatever else is in there.
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Product overview w valley flashing protects the critical area of your roof where two slopes come together to form a valley.
The following steps will explain how to install metal flashing in roof valleys.
Use roof valley cleats at intervals of 24 o c.
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Residential and commercial roofing shingles slate roof ventilation roof underlayments asphaltic and tpo roof membranes.
How to secure metal roof valley by clips cleats or edge trapping roofing nails.
Roof valleys are where two faces of the roof meet which will be the case in any gable or hip roof that has multiple roof sections.
Installing metal flashing for your roof project is a challenging but essential step to take to ensure that the new roof remains as weatherproof and as strong as possible.
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.
Be sure to check local building codes to ensure you have the proper width for your application.
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 while this is a nice diagram of how these flashings work don t forget our 5 th design rule.
When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter.
The flashing shall be a minimum of 4 inches 102 mm high and 4 inches 102 mm wide.
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Flashing should be installed in all of the valleys.
