Roofing Aluminum Valleys

Galvanized steel aluminum and copper can all be used.

Roofing aluminum valleys.

That flashing is left exposed so the roof has visible lines of metal running down the valley. 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. Preformed valley flashing is used to channel water down the roof into the gutters in the roof valley area. Fold the top over the roof ridge and cut the bottom along the drip edge metal.

How do valley metal flashings join at top of valley. It s bendable for various pitches. On top of that our pre formed metal product provides significant savings in installation time. Whether for slate shingle or metal roofing valley flashing adds detail and helps to direct water.

Install an underlayment centered in the roof valley. From a more opinionated viewpoint. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. 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.

18 w x 10 white l valley flashing. 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. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.

These items can be fabricated in many different profiles. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. An open metal lined valley properly installed is functionally better long term. Cut the panels from the ground instead of on the roof to avoid damaging the roof with the debris.

However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. To read pdf files you need the adobe acrobat reader 6 0 or higher. Quality edge valleys effectively channel the rainwater to run off easily and add strength where it s needed most in the center area of the flashing to provide long term peace of mind. When cutting your metal roofing to fit valleys it s important to use the proper tools.

An open metal lined valley has a cleaner and more appealing look. Valleys are a very important part of a well designed roofing system. A closed valley may be just fine given the budget and type of roof. An open valley relies on metal flashing for protection.

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. Then install a non corrosive metal valley flashing of 24 minimum width. With a clean valley you can lay down some peel and stick roofing membrane.