Steel Roof Dormer Valley

Roof mastic applied along sides of valley flashing.

Steel roof dormer valley.

How to seal metal roof valley. Closed cut valley fully replaced with new metal valley flashing. W valley flashing protects the critical area of your roof where two slopes come together to form a valley. Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet.

Low slope roofs slope less than 3 12 use tape sealant between the valley trim and the panel. Roof shields not only provide a permanent seal but they are easy to install saving time and money. To properly install a valley cap the w valley flashing must be notched and installed as shown on this instruction sheet. 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.

Best practices for sealing the metal roof valley vary based on the slope of the roof. Punctures in the center of the valley. Roof shields work with standard valley flashing but w valley style flashings are recommended for the best overall roof system. Avoid the following common errors.

In a previous video we covered how to flash roof edges before shingling. Roof valleys are like gutters with a steep pitch but the stakes are higher for valleys than they are for gutters. First clean the debris out of the valley including sawdust nails and whatever else is in there. Fabral metal wall and roof systems.

Fasteners placed in the exposed center area. The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. Failure to extend the entire width of the metal valley flashing beyond the eave of the roof. When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter.

The top joinery of both valleys when they meet on the same plane of roof is shown here. Be sure to check local building codes to ensure you have the proper width for your application. In this video we ll flash the valley.