How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
How can I make my roof last longer?
Friday, August 10, 2018
Examining your roof and doing minor maintenance regularly is the key to extending the life of a roof. Here’s six suggestions for asphalt shingle roofing, most of which apply to other roof types too:
1) Take a look your roof twice a year from the ground and, if necessary, from a ladder for any areas that are not visible from ground level. Look for damaged, loose and missing shingles, loss of granules (as in the photo above), any deterioration of the sleeves at vent pipes, and corrosion or damage of flashings. Binoculars are helpful for distant areas. Also, take a look after any severe weather event. Look at the underside of your roof deck from the attic also, paying special attention to areas around roof penetrations, such as chimneys, vent pipes, flues, and skylights for stained areas of sheathing that indicate leakage. Have any problems you find repaired promptly.
2) Trim back any tree branches close to the roof. The wind can push branches back-and-forth over the surface and abrade away the surface of the shingles. Keep any climbing vines, especially thorny ones like roses or bougainvillea, off the roof for the same reason.
3) Don’t let leaf debris accumulate on the roof, and remove any buildup gently. We suggest using a leaf blower on low setting or soft-bristle broom. The acidity that is created as the leaves rot will shorten the life of the roofing under it, and a layer of leaves makes it difficult to evaluate the condition of the roof.
4) Coat the roof with an elastomeric paint only as last resort. It will void the roofing manufacturer’s warranty and, although it can seal small defects in the shingles for a couple of years, the coating does nothing to repair the lack of tab adhesion that comes with age, and an older roof will continue to be vulnerable having shingles snapped off in a storm.
5) Never pressure-wash the roof to clean it. No matter how careful you are, a pressure-washing blows off too much of the protective granules on the surface of the shingles and deteriorates the tab adhesion.
6) Do not allow the roof to be walked on any more than is necessary for maintenance. Foot traffic scuffs the surface, and those areas will deteriorate faster than the rest of the roof.
Also, see our blog post What's the average lifespan of a roof?
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To learn more about roofs and attics, see these other blog posts:
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