How to Maintain Roof Flashing


Roof flashing is like an insurance policy for your home. It’s designed to keep rainfall and moisture from getting underneath shingles at roof intersections, around chimneys, and surrounding roof vents. This material should always be inspected and maintained for the security and longevity of your roof.

Flashing is installed at the base of the chimney underneath the shingles and then again on top of the chimney for optimal protection. When this flashing becomes damaged you’ll need to repair it immediately with a proper sealant. First, use a wire brush with soap and water to clean the surface completely. You can then cover the damaged area with plastic roofing cement followed by a piece of fiberglass mesh. Finish the job by adding a second layer of cement over the mesh.

Valley Joints
When one part of the roof intersects with another it will be highly susceptible to roof leaks and water damage. The flashing is usually not damaged in this area of the roof, but the singles surrounding it become extremely vulnerable and allow moisture in. If the shingles have begun to curl, place roofing cement underneath each shingle and press it down onto the flashing. Do this to each shingle in the affected area followed by an additional layer of cement where the shingle meets the flashing.

Handy Tips
Dipping a knife in paint thinner can help you smooth out a patch, adding a secure finish.
During repairs, avoid stepping on or near the flashing. Any pressure on the surrounding roof, up to a foot away, can cause the security of the installation to weaken.
Always clean flashing before patching it to allow any cement or other materials to dry directly on the flashing.

Maintaining your flashing is an important job all must do, otherwise, you run the risk of exposing your roof to moisture. When you need your flashing repaired or replaced, contact the expert installers at Preferred Exterior. To learn more, or to schedule a free estimate, give us a call at (516) 354-7252.

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