Metal Roof Dormer Valley Installation

As you install roof shingles on the second roof plane you allow them to lap over the valley on top of the first shingles.

Metal roof dormer valley installation.

I have my valley custom made with water trough to help with leaking b. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. The top joinery of both valleys when they meet on the same plane of roof is shown here. In existing homes it is most cost effective to add a dormer when a roof is being replaced.

Cut it about 6 long and it will have to be cut in the bend from where it comes into contact with the main roof the extra 6. This will reduce the installed cost of the project especially if there is a significant number of valleys in the roof system being installed. How to install a valley on a vicwest metal roof. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps.

Install metal flashing at every dormer roof to main roof connection. Contractors may be able to reduce the cost of materials on roofing projects by eliminating the metal being installed in the valleys. However valley flashing materials. Then install a non corrosive metal valley flashing of 24 minimum width.

Open valleys on the other hand leave the metal exposed which may be more pleasing to the eye especially if copper is used as the valley lining. Place this in the valley on each side of a gable roof one edge laid on the gable roof with the other side nailed flat on the. It is essential to only use whole not cut shingles during this step. Applicable for ultravic supervic 7 8 corrugated barnmaster diamond rib double.

The ridge flashing on the dormer covers the end of the valleys at the peak and tucks under the main roof. 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. In summary during the installation of a closed cut valley you install the first roof plane s shingles into the valley. Recommended procedures of basic valley flashing installation.

The best time to limit the cost of a dormer is when the home is being built. With a clean valley you can lay down some peel and stick roofing membrane.