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Chimney flashing installation explained

Roofing damage occurs not only as a result of old, worn shingles but also through chimney flashing damage.

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Chimney flashing by chaim zvi on Flickr.Roofing damage occurs not only as a result of old, worn shingles but also through chimney flashing damage.

If you wish to install chimney flashing on your asphalt roof for additional security against weathering, request roofing quotes for affordable chimney flashing.

Before you install roof flashing, you should first understand the basic requirements, including compatible materials, appropriate fasteners, separate counter and sub flashings, and sealants, in order to ensure a problem-free installation.

Get free chimney flashing and other roofing quotes today!

Chimney flashing is a metal covering applied over the seams located between the asphalt roofing and chimney. It helps to protect your roof from water leaks.

If not properly installed, your chimney flashing may break or come loose due to high winds or other inclement weather, putting your residential roofing at risk of early deterioration.

Contractors have found that faulty chimney flashing installation leads to chimney leaks. The leaks allow the moisture from rain and snow to seep into the roof's inner structure and cause mold, mildew and premature aging.

When your chimney flashing becomes rusted, corroded, broken or chipped, you should consider installing new materials in order to minimize the damage to your residential roofing. Depending on the state of deterioration, you may need to replace the surrounding asphalt shingles as well as part of the chimney.

If you're installing the chimney flashing yourself, you will need to follow the necessary steps to ensure a secure fit and optimal protection.

    • Measure the chimney width.
    • Cut the flashing 10 inches longer than your measurement.
    • Using tin snips, slice the flashing 5 inches in on each side, allowing the flashing to lie flat against the roof.
    • Placing the starter strip along the chimney's edge, bend the cut side so that the flashing fits tight against the chimney and roof.
    • Nail the sides securely into the chimney, but do not nail the flashing into the roof, as this will damage the roof.
    • Using the step method to overlap the shingles: Insert a shingle, then the flashing and so forth until you have completed each side.
    • Apply silicone caulking to the shingle's under-edge as well as to any exposed areas of chimney flashing along the chimney's edge to prevent water leaks.

If you are unable to install chimney flashing yourself, requesting a roofing cost estimate from a contractor will help ensure an affordable rate. A highly trained roofing contractor can inspect your roof, chimney and drainage systems to see if any damage has occurred.

Inspecting your roof twice a year will help you avoid expensive roofing repairs. Reviewing your roofing warranty will help you determine how much to budget for potential repairs.

Whether you wish to install your chimney flashing yourself or have it professionally installed, making sure the flashing is properly installed is crucial to avoiding costly repair fees. Find professional contractors in your area and request free quotes today.

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Photo credit: chaim zvi via Compfight CC.