HOW CAN YOU TELL WHEN YOUR ROOF NEEDS TO BE REPLACED?
There are many subtle signs that your roof is aging, but the overwhelming sign that your asphalt shingle roof needs to be replaced is granular loss. Asphalt shingles are made up of a base layer that’s covered in asphalt, and then layered with mineral granules. The asphalt holds on to the granules, which protect the shingle base from exposure to damaging UV rays.
As the shingles get older, they’re less capable of hanging on to the granules, so the granules fall off over time. Loss of granules is gradual at first, but over time, this becomes more severe. If your roof is shedding granules quickly, this is a sign that your roof needs to be replaced – because your shingles are just too old. Once the granules start to fall off, the shingle is exposed to more UV rays and the deterioration of the shingle speeds up from there.
In the south, shingles tend to last about 18 to 23 years. This is mostly due to the climate. Exposure to heat and sunlight can really do damage to your shingles over time. The same shingles that last 18 to 23 years here might last 30 years in the Midwest or in the northeast. Shingles last much longer in climates where the winters are cold and the spring and fall is milder overall.