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3 Types of Flashing That Can Help Waterproof Your Roof

Roof repairs and installation projects focus on ensuring the roof is as waterproofed as possible to prevent damage within your home. Waterproofing becomes trickier on roofs with architectural elements such as sharp corners, dormers, or emerging piping or chimneys. Roof flashing is one way your roofing contractor can ensure these tricky places are waterproofed.

Flashing is simply flexible metal pieces that can be bent to fit around the corners or round protrusions that are hard to snugly protect using shingles. There are a few different styles or types of flashing that work in different ways. Discuss your options and needs with a roofing service, such as Darnell Construction, before the project begins.

Drip Edge Flashing

The area of the roof between the rafters and the gutters is called the fascia. The fascia should overlap the gutter slightly so that water running off your roof is delivered well into the gutter rather than at the edge, where it would risk getting caught between the fascia and gutter and causing water damage. If your existing fascia doesn’t overlap the gutters, you can ask your roofing contractor to install new fascia or to install drip edge flashing.

The drip edge flashing acts as a fascia extension to ensure that the flat sloping piece extends over the gutter. Drip edge flashing is cheaper to install than an entirely new fascia and allows you to retain any decorative features of your existing fascia. The drip edge is also handy if your roof is missing the fascia entirely and simply has shingles that fail to extend over the gutter well enough.

Channel and Valley Flashing

Channel flashing and valley flashing both help funnel water from lower sections of roof created by the roof’s architecture. The channel flashing forms a “u” in areas where a sloped section of roof meets a vertical or near vertical section of roof or a wall. The channel flashing essentially forms a gutter that can carry the water out of a tight area and down to the actual gutters.

Valley flashing is placed in areas where two meeting roof sections form a valley or trough. If the valley doesn’t have enough of a slope, water can get trapped in this low area and start to cause moisture-related rotting. The valley flashing forms a slanted slick tunnel that can carry the water down to the gutter.

Vent Pipe and Chimney Flashing

Vent pipe and chimney flashing are both designed to fit snugly around protrusions through the roof. Vent pipe flashing fits around any pipework such as air conditioner venting or water pipe ventilation. Chimney flashing, as the name suggests, fits around where the chimney emerges from the roof.

Using vent or chimney flashing can prevent moisture and weather damage to the pipes and chimney below the roof level and to the shingles immediately surrounding the protrusions