Installing Flashing On Roof Valley

Once the shingles have been installed lay the base flashing around the base of the chimney approximately 4 past each end.

Installing flashing on roof valley.

Cut the bottom edge and fold it down over the drip edge. 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. Make sure to cover the gap at the bottom of the raised ridge. Valley flashing is made of aluminium metal pvc galvanized steel.

When you install roof flashing you will need to use a sealant. Now notch the first step flashing so that it will bend to go around the chimney front and side as well as at the base. Step 6 install the flashing. Use 1 inch galvanized roofing nails.

A flashing on the other hand is a waterproofing material used to prevent leaks on roofs. A valley is the part of your roof where two descending parts of the roof meet each other. Remember to caulk the underside of the flashing with a sealant. 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.

Attach the flashing panel in place at the bottom. Snipping off the corners of. Fold the top of the flashing over the ridge. While roofing professionals occasionally use nails when flashing they must choose whether to nail to the roof plane or the vertical wall.

It is necessary to install flashing in your roof valley as valleys are prone to developing leakages. Step flashing for chimneys. Others start with a 3 inch wide. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch.

Now nail this first flashing at both its far ends. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof. Installing your roof flashing is going to be slightly different depending on the specific type that you re installing. Some roofers cut the shingles parallel to the flashing s center ridge.

Install an underlayment centered in the roof valley. Recommended procedures of basic valley flashing installation. Place a piece of sheet metal under the shingles to make sure you will not damage the flashing.