How do you install flashing under existing shingles?

How do you install flashing under existing shingles?

In order to properly install new flashing, you'll have to remove the shingles surrounding your old flashing, and then re-lay them after installation. Typically, flashing is installed using roofing nails and roofing cement.

Does flashing go over the roof felt?

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. Step flashing protects the joints between the roof deck and chimneys or dormers. ... Metal flashing material is generally soldered or brazed.

What is W valley flashing?

W-Valley Flashing protects the critical area of your roof where two slopes come together to form a valley. When properly installed, W-Valley Flashing will reliably channel run-off water down the roof and into the gutter.

How wide should valley flashing be?

If not metal, the material must still be corrosion-resistant and non-staining. Also, at a minimum, valley flashing must be 24 inches (610 mm) wide. Take care to understand your code's thickness requirements for flashing, as there is often confusion about this point according to Professional Roofing.

Does flashing go over Tarpaper?

Installing roof drip edge flashing properly The best way is to install the roof drip edge only along the eaves first, then place ice-and-water barrier (in the snowbelt) or felt paper (underlayment) over the drip edge. This lets any water that gets on the roof run down the underlayment and over the drip edge.

What size step flashing do I need?

Step flashing needs to turn up a minimum of three inches up the sidewall. The flashing material should be 4 inches by 7 inches in length when it lies on the roof deck. The 7-inch length ensures a 2-inch headlap on each course. Once complete, the housewrap should overlap the step flashing that's applied to the wall.

Is window flashing necessary?

Flashing is an essential component of proper window installation. It catches rain that is blown at an angle onto your home. Siding isn't enough protection between your house and the rain and moisture that occurs outdoors, which is why you need to put an extra barrier between your window and siding.