How Often Does a Roof Need to be Replaced?

Did you learn that it's time for a roof replacement? Are you unsure if it's true because you don't know how often a roof should be replaced?

A roof replacement is never a fun experience. It can be stressful, time-consuming, and, most importantly, expensive. 

Luckily, a roof isn’t meant to be replaced often. And as long as you hired a reputable roofing contractor to install it, you shouldn't have to replace your roof until the end of its lifespan.

The problem is knowing when you should replace a roof. Or worse, having a roofer tell you it's time for a new roof when it's really not. 

So, how often does a roof need to be replaced? And how can you tell if you actually need a new roof. 

For over 35 years, Bill Ragan Roofing has helped homeowners understand when and how often they'll have to replace their roof. That's why I'll break how often, when, and why you should replace your roof. 

By the end of this article, I'll answer:

• How often does a roof need to be replaced?
• What are the signs that you need to replace your roof?

How often does a roof need to be replaced?

Most roofs in the United States get replaced every 20 or so years. However, every roof is different and the lifespan heavily depends on the roofing material.

On top of this, there are plenty of factors that impact how often you'll have to replace your roof, including:

• Material quality
• Installation quality
• Proper attic ventilation
• Weather conditions
• Direction the roof faces
• Roof maintenance

If your roof was properly installed, your attic is adequately ventilated, and your roof is maintained, it will get close to the maximum lifespans in the above table. So, depending on the roofing material, you shouldn’t need a replacement for around 20 years or even up to around 50 years (or longer).

What are the signs that you need to replace your roof?

Now you know that a roof isn't mean to be replaced often. However, the last thing you want is to wait too long when it's time for a roof replacement. 

Unfortunately, most homeowners don't know when they need a new roof until problems start. That's why it's important to know what signs to look for to determine if it's time for a roof replacement. 

Continuous roof leaks

A roof with continuous leaks is either failing due to improper installation or has reached its maximum lifespan. This is especially true if you have an older roof that has required frequent repairs.

Common problems such as nail pops or a cracked pipe boot don’t mean a roof is failing. It’s even possible to experience multiple repairs on a single issue.

However, frequent leaks in different roof areas are a sign of larger problems. That’s why the only solution for a failing roof with continuous leaks (especially an older one) is a complete replacement.

Moss and vegetation growth

Moss and other vegetation growth on shingles is usually a sign that it’s time to prepare for a replacement. Moss shortens shingles’ lifespan, which is why manufacturers have special granule formulas to prevent moss growth for as long as possible.

So, if you see moss on your roof, there’s a good chance the shingles are starting to lose their full effectiveness. While this is more common on older roofs, moss can grow on roof areas that don’t get enough sunlight.

Just know it’s common for black streaks caused by algae growth to form on a 10 to 15-year-old roof. While the black streaks don’t look great, it doesn’t mean your ready for a replacement.

Cracked, curling, or missing shingles

Seeing curling, cracked, and/or missing shingles are clear signs that your roof is starting to fail and needs replacing. If shingles get to this point, it usually means your roof has reached the end of its lifespan.

Unfortunately, improper installation and/or inadequate attic ventilation lead to shingle degradation much quicker. If this happens, your roof will fail prematurely and need replacing well before it should.

Wind damage is also a common cause of missing shingles, but you’ll have an insurance claim if this happens.

Shingle delamination

While curling and cracking also play into this one, shingle delamination is a huge sign that your roof needs to be replaced. Asphalt shingles are made of layers of asphalt and protective granules on a fiberglass mat.

Shingle delamination is simply the separation of these individual layers, which leads to the loss of structural integrity, protection, and adhesive properties. Obviously, shingles can’t perform their function correctly if they’re separating or peeling.

So, shingle delamination is always a clear sign that it's time to start preparing for a roof replacement.

Visible granular loss

Granules are pieces of asphalt embedded in shingles for fire resistance, color, and UV ray protection. They are crucial to the longevity of an asphalt roof, and a roof loses them naturally as it ages.

However, severe or widespread granular loss is one of the biggest signs that it's time for a roof replacement. If it’s bad enough, you’ll find a lot of granules on the ground by downspouts and/or in your gutters.

Just know hail also causes granular loss, whether it’s one large storm or multiple.

Roof waviness and sagging

Roof decking is the wooden foundation that your entire roof system is installed on. Whether it’s from a prolonged leak or inadequate attic ventilation, the wood holds excess moisture.

Holding on to the excess moisture causes the decking to become wavy, which is a clear sign that a roof is failing due to improper installation and/or poor attic ventilation. However, the decking also loses its ability to hold nails and load-bearing capacity if it’s left to sit too long.

This causes severe sagging once the weight of the roofing materials starts to bear down on the compromised decking. If it gets to this point, you're most likely looking at complete roof failure, which means a roof replacement.

Discolored decking visible in the attic

While waviness and sagging are clear signs of a failing roof, you can catch the complete failure before it happens by checking the decking from the attic. Finding discoloration on the bottom of the decking in your attic means has water soaked through the wood, which means the roofing materials are failing.

Unfortunately, this means you need a roof replacement or, at the very least, extensive repairs. It could be from improper installation or the roofing materials maxing out, but either way, the structural issues we just talked about will happen if left to sit.

On top of all this, the wetness creates a perfect environment for mold, mildew, and termites to thrive.

Houses around you are getting new roofs

While not always a sign, it's a good bet it's time for a roof replacement when other houses in your neighborhood are getting one. This is especially true if the homes in your neighborhood were all built around the same time.

This obviously won’t apply to you if your neighborhood is much older or the houses were built at different times. However, potential storm damage is another reason you should pay attention to if other homes in your neighborhood are getting a new roof.

If your neighbors are getting their roofs replaced after a strong thunderstorm with hail or straight-line winds, they had a viable insurance claim. While there’s no guarantee that your roof specifically has damage too, you should contact a roofer and your insurance company for an assessment.

What do you need to know before jumping into a roof replacement?

After reading this article, you now know how often a roof is replaced on average and based on roofing material. You also learned the signs of needing a new roof to help you determine when it's time for a replacement. 

If it is, you'll have to make some big decisions. You need to choose the right roofing material, know how much your replacement will cost, how to hire a great roofing contractor, and so much more.  

I want you to be fully prepared for such a big purchase and avoid getting taken advantage of by bad roofers. That’s why I wrote another article breaking down everything homeowners need to know and consider before getting a new roof.

Check out 7 Things to Consider Before a Roof Replacement to learn what you need to know before starting the roof replacement process.

If you're local to Nashville, don't hesitate to Get a Free Quote here or call our office at (615) 242-0333 today to schedule your free roof replacement estimate.