Installing Steel Roofing Valleys

Flashing should be installed in all of the valleys.

Installing steel roofing valleys.

Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Then install a non corrosive metal valley flashing of 24 minimum width. Install an underlayment centered in the roof valley. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps.

Always be sure to refer to your local codes to see if they demand a particular kind of valley installation. Next use 1 inch nails to secure some metal edging to the perimeter of the roof. Steel roofing can be costly but it is a lifetime investment. Florida building code allows a minimum pitch of 2 12 for grand rib 3 panels as long as lap screws and sealant are applied to the laps to prevent water from siphoning over the ribs see fig.

Open valley shingle installation. 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 the following steps will explain how to install metal flashing in roof valleys. Recommended procedures of basic valley flashing installation. Then cover the entire roof with a layer of insulation and secure it with a staple gun.

With a clean valley you can lay down some peel and stick roofing membrane. Noise is usually not a factor if you are installing a steel roof over asphalt. Installation of panels roof pitch this style of metal roofing panels requires a certain degree of pitch to ensure proper water drainage. 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.

Fold the top over the roof ridge and cut the bottom along the drip edge metal. When installing metal valley flashing there are a few things to keep in mind from cutting metal roofing to sealing the flashing. Indeed california valleys are prohibited in some areas. Before you install metal roofing repair any damage to the wood under the shingles.