Urbana Roofers: Article About Flashing
Although the flashing on a roof appears to be inconsequential to the roofing system's structural integrity and functionality, it performs an essential service of protecting against water in the roof's vulnerable areas. Over time or after a severe storm, the aluminum or galvanized steel flashing strips can become damaged, resulting in problems with the shingles or the roof decking underneath. Homeowners who notice problems with their flashing should contact local Urbana roofers for an assessment of the situation.
One of the leading problems with roof flashing is oxidation. This process occurs gradually over time and is especially common on areas of the roof such as valleys or edges along the eaves where water, ice or snow accumulate. Oxidized flashing will turn a rusty brown or orange color. Some of the stains may spread down over the surface of nearby shingles. If the homeowner cleans out the rain gutters, some flakes of rust from the flashing may be collected inside the gutter system.
In some instances, faulty installation is responsible for premature failure of aluminum flashing. If the roof or flashing was installed during a time of high humidity, it will be prone to oxidation. The use of incorrect fasteners, such as nails that are too short or the use of staples instead of nails, may also be the cause of flashing problems.
The roofers of Roofs By Rodger of Urbana IL can assist you with any questions regarding gutters or roofing.
Another way that roof flashing can become damaged is after a strong storm. High wind gusts and torrential rains may rip a strip of flashing way from its fasteners. Other types of severe weather events, such as ice storms and hailstorms, may puncture the flashing or dent it, causing it to loosen.
On homes where the roof is 20 years old or older, the flashing may deteriorate due to failure of the sealant or caulking used around it. Cracked or loose caulking allows moisture to get under the flashing. During the winter, the moisture can freeze. The expansion of frozen water can push the flashing up out of its proper position, causing it to become loose or fall off. Flashing located around dormers, skylights and chimneys is especially prone to caulking failure, as these roofing additions involve the creation of additional openings where water can accumulate.
In most cases, small areas of damaged flashing can be replaced without having to do an entire new roofing job. Because the flashing on a roof is typically located in sloped areas, only a professional should replace the damaged pieces.