flashingblog

Signs of Damaged Flashing

Although shingles are the primary protectors of your roof, they can’t completely seal joints or corners. Roof flashing may be thin and galt, but it plays a large role in keeping water from damaging your home. 

Roof Flashing Structure and Purpose

Roof flashing materials are weather-prrof. You may see numerous materials be used for flashing but it’s typically a rust resistant metal such as:

Galvanized steel – used most often and preferred by professional roofing companies

Aluminum-zinc coated steel marketed under the Galvalume name – offers more corrosion resistance than galvanized steel

Aluminum – easily bent and the material of choice for DIY installation

Copper – custom-made for copper roofs

Roof flashing is installed wherever there’s an intersection or a termination of your roof. That means you’ll see roof flashing material in the following areas:

At vent pipes

Along roof ridges

In low areas (valleys) where roof pitches connect

Around dormer walls

Around skylights or other windows extended from the roof

For flat roofs or those without overhanging eaves or soffits, drip edge flashing may be installed to move water off the roof into a gutter system.

Assessing Roof Flashing Damage

Since flashing is usually made with metal, it appears to be sturdier than shingles or tiles. It’s designed to be tough. Over time, roof flashing material will begin to show signs of wear and damage. 

Taking time to visually check your roof after a severe weather event is important. Inspect your roof multiple times of year to ensure you catch a problem early on. While your visual inspection from ground level is a great starting point, getting an inspection from a professional is recommended. Their expertise ensures damage will be found, and they can provide 

recommendations when there is damage.

Signs of Damage

Small holes: Water needs only a little space to seep under roof shingles. Small holes in roof flashing caused by corrosion or wildlife (woodpeckers) can turn into a large problem and need to be sealed.

Rust or corrosion: Even with galvanized coatings, roof flashing materials will corrode over time due to the reaction with air. Salt air is more corrosive than inland air. Rusted roof flashing will no longer repel water and needs to be cleaned, sealed or replaced.

Missing pieces: If the roof flashing loosens during storms or high winds, is not affixed properly or is peeled back by a curious raccoon, you may notice missing pieces. The absence of the water barrier flashing is a serious concern.

Bends, cracks or dents: A bend or crack seems minor, but this type of damage breaks the galvanized coating on steel or weakens the structure on other metals. When the metal is compromised, it can be more susceptible to corrosion.

Internal leaks: You may not be able to see all the roof flashing, but internal leaks near windows, fireplaces, skylights or in your attic are another sign of damage.

Mold or staining on fascia boards: Drip edge flashing that was improperly installed can cause this type of damage.

Worn or damaged siding or shingles: When the roof flashing fails to rebuff water properly, you may see water damage on siding. Shingles in low spots or near areas where flashing is used may show signs of water damage (darkening, bending), indicating the roof flashing material has been compromised.

You’ll find numerous online sources for DIY advice about how to repair your flashing, but this type of work is best left to the professionals. Professional roofers have the expertise to safely navigate and identify problems that need to be fixed. Call us today for a free drone inspection.

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