Roofing Aluminum Valleys

18 w x 10 white l valley flashing.

Roofing aluminum valleys.

Cut the panels from the ground instead of on the roof to avoid damaging the roof with the debris. How do valley metal flashings join at top of valley. Whether for slate shingle or metal roofing valley flashing adds detail and helps to direct water. These items can be fabricated in many different profiles.

Preformed valley flashing is used to channel water down the roof into the gutters in the roof valley area. Galvanized steel aluminum and copper can all be used. An open metal lined valley has a cleaner and more appealing look. Fold the top over the roof ridge and cut the bottom along the drip edge metal.

To read pdf files you need the adobe acrobat reader 6 0 or higher. An open metal lined valley properly installed is functionally better long term. An open valley relies on metal flashing for protection. Valleys are a very important part of a well designed roofing system.

As the asphalt shingles are installed over the roof deck the shingles are extended into the valley. When cutting your metal roofing to fit valleys it s important to use the proper tools. However you need to cut down the middle of the valley so that one side lies against the main roof and the other. Avoid using anything that will melt the galvalume coating such as a chop saw torch or abrasive blade.

Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. 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. If you re referring to a dormer roof where two valleys meet from either side then you extend each to about a foot above the dormer peak meets the existing roof. Quality edge metal valley better roof faster install.

On top of that our pre formed metal product provides significant savings in installation time. Then install a non corrosive metal valley flashing of 24 minimum width. That flashing is left exposed so the roof has visible lines of metal running down the valley. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps.

However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. It s bendable for various pitches. Install an underlayment centered in the roof valley. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.

From a more opinionated viewpoint. With a clean valley you can lay down some peel and stick roofing membrane. 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.