Flashing On Roof Valleys

Step flashing protects the joints between the roof deck and chimneys or dormers.

Flashing on roof valleys.

Install valley battens on both ends of the roof valley then attach first flashing 3 4 inches over the roof flange and another 3 4 inches over the fascia if any is present. Snipping off the corners of. Lay the flashing down in the roof valley and start at the lower end of the roof. Then install a non corrosive metal valley flashing of 24 minimum width lap successive sheets of metal flashing a minimum of 12 inches and seal laps.

Place a piece of sheet metal under the shingles to make sure you will not damage the flashing. Attach the flashing panel in place at the bottom. Use 1 inch galvanized roofing nails. Apply an approximately 3 inch.

Val ley flashing protects the valleys where two roof planes meet. 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. Valley flashing valleys are the places where two roof decks slope toward one another creating a low line that looks like a valley between two mountains. Some roofers cut the shingles parallel to the flashing s center ridge.

To secure the roof valley flashing nail it down carefully. Only nail at the edges with only enough nails to. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof.

Others start with a 3 inch wide. How to do it determine cuts. Make sure to cover the gap at the bottom of the raised ridge. This material is available with a v or w shaped profile and is placed over the top of the building felt before the roof s finishing material is installed.

Recommended procedures of basic valley flashing installation. Then starting at the base of the. Install an underlayment centered in the roof valley. Step 6 install the flashing.

Ensure ice and water protector has been installed along the valley first. Fold the top of the flashing over the ridge. Water flows into the valleys on your roof the same way rivers wind through mountain valleys. Valleys as you d imagine are a prime target for water penetration.