Most asphalt shingle roof systems in the S.E. United States are constructed of a 25 year three-tab shingle or a 35 year architectural shingle in the southeast, however, there are numerous other maintenance points throughout roof system including plumbing vent boots, mechanical vent stacks, attic static vents, power vents, chimney cap/rain pans, sealant, and many more which require regular inspection and attention on an as-needed basis.
It’s a good idea to put a trained eye on these points every three to five years and inspect them.
Here are just a few examples of common maintenance areas:
(Fig. 1 ) Moss, Mildew, & Lichens commonly grow on shingles beneath overhanging tree limbs and vegetation. Removal and prevention of regrowth is critical to keep your shingles in good shape for a long time!
(Fig. 2) When the winds of time cause a nail to back out beneath the shingle, it can cause several problems. One is that the shingle is no longer correctly adhered to the tab below it, two is that the nail may cause a hole in the tab above it, or the lifted tab may be ripped off by wind. It’s important to ensure that these nailes/tabs are correctly re-nailed and re-sealed.
(Fig. 3) While your shingles are designed to last 20-35 years (in most cases), these plumbing boots (common to 90%+ of homes) will typically fail in 5-7 years, are generally not installed/sealed correctly to begin with, and are among THE most common leak causes.
(Fig. 4) At the ridge (very peak of the roof), it’s common that there will be a couple of shingles with exposed nails. Generally, these are the ONLY nails you would expect to find exposed on a shingle, so they require a UV resistant roofing sealant to be applied over top. Unfortunately, these sealants will need to be replaced every 1-5 years.
(Fig. 5) Everyone knows that rust on your home is a bad thing. Literally, there is never a time that you want to see rust on your home, especially on the roof system. Because these mechanical vents are designed to work with appliances like water heaters, stove top vents, and furnaces, a leak is likely to result in water coming into the appliance it is attached to, in addition to the wood around it.