Roof Valley Against Wall

Some roof leaks are tough to locate.

Roof valley against wall.

Stop nailing 6 inches from the center. Position an extension ladder against the lower edge of the roof near the valley that is repaired. Sometimes the water shows up at a ceiling spot distant from the leak. Here is an attempt though maybe not a very good one to make the roof flashing serve also as a through the wall flashing with a tile roof.

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. A common problem area is the point where a gutter dies into an adjoining wall as the photo below illustrates. Open valleys have metal flashing to protect this critical area of the roof. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.

In comparison to a closed valley an open valley adds another layer of lining into the valley. Below are two photographs of roof wall step flashing completed and effective of a slate roof against a brick wall below left and in process with step flashing against a dormer sidewall before the dormer siding has been put in place below right. If your ceiling has a plastic vapor barrier between the drywall and the attic insulation push the insulation aside and look for flow stains on the plastic often water runs to openings in the vapor barrier such as at ceiling light fixtures. The flat roofing material must go up the wall a minimum of 12 or up the wall and over the top of the wall if the wall is less than 12 high.

Unless you re careful step flashing can allow water from the roof to slip behind the gutter and get behind the siding and even the housewrap. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. Roof one side of the valley running the shingles across it. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

Proper roof wall abutment flashing examples. The asphalt shingles serve both as the valley lining and as the wear surface to protect against water. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. This recommendation includes iko s premium shingles.

Iko recommends that you install architectural shingles with the open valley method for the best roof performance. A key part of my approach is using a special piece of flashing at this. After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed. The exterior of a house presents plenty of opportunity for leaks.

Shingle the other side of the valley the same way. What is an open valley roof.