Creating Lasting Repairs

A Look At The Importance Of Flashing When You Have A New Roof Installed

by Marvin Gilbert

When you think about having a new roof installed, you probably think about the shingles or tiles. However, a roof is composed of different parts, and flashing is one of them. Flashing is very important for protecting against leaks. When your roofing contractor installs a new roof, proper placement of the flashing is critical. When the roofer inspects an old roof, the flashing is one thing that's examined for signs of damage, wear, and leaks. Here's a look at where flashing is used on your roof and how it protects your home.

Flashing Directs Rain In Valleys

Flashing is used in roof valleys to help direct rain. Since your roof slopes toward a valley, rain naturally drains there. Flashing is in place to keep the rain from leaking under the tiles or shingles. The flashing acts as a trough that collects water and sends it to the gutters to be drained away from your house. This type of flashing is often made from galvanized steel so it will last a long time without rusting.

Flashing Prevents Leaks Around A Chimney

You may be familiar with flashing around a chimney since it is visible from the ground. This type of flashing is usually made from metal too, such as aluminum or galvanized steel. It acts like a skirt around the chimney that keeps water from rolling down the sides of the chimney and flowing under the roof penetration. There is usually a continuous layer of flashing that goes around the perimeter of the chimney that is topped with step flashing that's applied in layers and adhered to the chimney so no rain can leak behind the flashing. If your roof develops a leak, one place to check is the chimney flashing as this can be damaged by storm debris or a curious raccoon.

Vent Pipe Flashing 

This type of flashing fits around vent pipes that protrude through your roof. It is made from metal or rubber and is applied as the roof is put on so it can fit under shingles. Your roofer inspects the flashing when checking your roof for damage because it can rust and develop leaks. If it's made of rubber, it can crack and deteriorate due to sun exposure and temperature extremes. This flashing creates a tight seal around vent pipes so no rain can drip down the pipe and get under the shingles to cause water damage to the deck.

Bad flashing can sometimes be repaired without the need to get a new roof, but if flashing is bad due to age, the rest of the roof is probably old too. Flashing is installed around anything that penetrates your roof to reduce the risk of leaking. It's a roofing material that's often forgotten, but that plays a very important role when having a new roof installed.