Metal Roof Dormer Valley

Installing dormer valley flashing.

Metal roof dormer valley.

Fabral metal wall and roof systems. Fabral metal wall and roof systems. Fold the top over the roof ridge and cut the bottom along the drip edge metal. Galvanized steel aluminum and copper can all be used.

I have my valley custom made with water trough to help with leaking b. That flashing is left exposed so the roof has visible lines of metal running down the valley. Unlikely but it can. However the hole that is created from the nail may eventually leak.

Preparing to install the panels around the sides of a dormer and up to the valleys. The top joinery of both valleys when they meet on the same plane of roof is shown here. It is made of galvanized steel and will not rust. An open valley relies on metal flashing for protection.

Drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies this collection of 18 articles animations and videos identifies the critical roof flashing areas illustrates durable roof flashing details and shows how to flash roofs. However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed. 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. As the asphalt shingles are installed over the roof deck the shingles are extended into the valley.

However you need to cut down the middle of the valley so that one side lies against the main roof and the other folds over the dormer peak. Shingles in the valley will not last forever and will have to be replaces during a re roof project but the nails will not leak. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.