---
title: What are the Signs that a Nashville Roof is Failing?
description: Think your roof is failing on your Nashville, TN, home? If so, you need to know the signs that a Nashville roof is failing and needs to be replaced. Here, you'll learn the signs that a roofer looks for when determining if a roof is failing, problems it causes, and why it leads to a replacement.
image: https://www.billraganroofing.com/hubfs/what-are-the-signs-that-a-nashville-roof-is-failing.png
---

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[Roof Replacement](https://www.billraganroofing.com/blog/topic/roof-replacement) | [Nashville, Tennessee](https://www.billraganroofing.com/blog/topic/nashville-tennessee)

# What are the Signs that a Nashville Roof is Failing?

November 17th, 2025 | 6 min. read

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![What are the Signs that a Nashville Roof is Failing?](https://www.billraganroofing.com/hubfs/what-are-the-signs-that-a-nashville-roof-is-failing.png)

<https://www.billraganroofing.com/blog/author/bill-ragan> ![Bill Ragan](https://www.billraganroofing.com/hubfs/Bill%20on%20hiking%20trail.png "Bill Ragan")

[Bill Ragan](https://www.billraganroofing.com/blog/author/bill-ragan)

** Print/Save as PDF

Do you think your Nashville, TN, home needs a new roof? Are you trying to decide if your roof is actually failing before reaching out to a Nashville roofer?

One of the biggest complaints Nashville homeowners have about the roofing industry is dishonesty. They automatically think they’ll be sold a roof, which is what many companies try to do. 

**At Bill Ragan Roofing, I don’t believe in operating this way.** Our Roofing Advisors do not sell roofs to homeowners who don’t need one (unless they want one), and it’s been that way for the 35-plus years we’ve been operating in Nashville, TN. 

Unfortunately, it’s impossible for us to be on every roof in the Nashville area. So, I want to give you the signs that I and other roofers look for when determining if a roof is failing. 

By the end of this article, you’ll learn how the following are signs that your Nashville roof is failing:

- Continuous roof leaks
- Moss and vegetation growth
- Cracked, curling, or missing shingles
- Shingle delamination
- Granular loss
- Roof waviness and sagging
- Discolored decking

## Continuous roof leaks

**A roof with continuous leaks is either failing due to **[**improper installation**](https://www.billraganroofing.com/blog/signs-bad-roofing-job)** or has **[**reached its maximum lifespan**](https://www.billraganroofing.com/blog/how-long-does-a-roof-last)**.** This is especially true if you have an older roof that has required frequent repairs. 

Now, roof leaks caused by common problems such as [nail pops or a cracked pipe boot](https://www.billraganroofing.com/blog/most-common-roof-leaks) 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 or other vegetation growth**](https://www.billraganroofing.com/blog/does-moss-roof-mean-needs-replaced)** on shingles is usually a sign that your roof is starting to fail, and it’s time to get ready for a replacement. **Moss shortens shingles’ lifespan, which is why manufacturers have special granule formulas to prevent moss growth for as long as possible.

![moss growth on old asphalt shingle roof that needs to be replaced](https://www.billraganroofing.com/hs-fs/hubfs/OldRoof2.jpg?width=600&height=450&name=OldRoof2.jpg)

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 roof is failing. 

## Cracked, curling, or missing shingles

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

![curling and cracking asphalt shingles](https://www.billraganroofing.com/hs-fs/hubfs/CurlingandCrackedShingles.png?width=600&height=400&name=CurlingandCrackedShingles.png)

Unfortunately, improper installation and/or [inadequate attic ventilation](https://www.billraganroofing.com/blog/why-proper-attic-ventilation-important-roof) lead to shingle degradation much quicker. If this happens, your roof will fail prematurely and need replacing well before it should. 

[Wind damage](https://www.billraganroofing.com/blog/how-spot-wind-damage-roof) 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 is failing.** Asphalt shingles are made of layers of asphalt and protective granules on a fiberglass mat.

![examples of delaminated shingles](https://www.billraganroofing.com/hs-fs/hubfs/ExamplesofDelaminatedShingles.png?width=600&height=400&name=ExamplesofDelaminatedShingles.png)

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 a roof is failing. 

## 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](https://www.billraganroofing.com/blog/how-long-asphalt-roof-last), and a [roof loses them naturally](https://www.billraganroofing.com/blog/what-does-granular-loss-mean-roof) as it ages. 

![old asphalt shingle roof with extreme granular loss](https://www.billraganroofing.com/hs-fs/hubfs/OlderRoofwithSevereGranuleLoss.png?width=600&height=400&name=OlderRoofwithSevereGranuleLoss.png)

**However, severe or widespread granular loss is one of the biggest signs that a roof is failing. **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](https://www.billraganroofing.com/blog/what-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](https://www.billraganroofing.com/blog/why-proper-attic-ventilation-important-roof), the wood holds excess moisture.

![wavy roof from failing shingle roof](https://www.billraganroofing.com/hs-fs/hubfs/ImproperlyInstalledShinglesthatareFailing.png?width=600&height=400&name=ImproperlyInstalledShinglesthatareFailing.png)

**This 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.

![sagging in roof due to shingle roof failure](https://www.billraganroofing.com/hs-fs/hubfs/ImproperlyInstalledRoof4-1.jpg?width=600&height=450&name=ImproperlyInstalledRoof4-1.jpg)

**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.

## Discolored decking

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**](https://www.billraganroofing.com/blog/what-replaced-roof-replacement)** are failing.**

![rotten roof decking from the bottom as seen in the attic ](https://www.billraganroofing.com/hs-fs/hubfs/DiscoloredDeckingFromtheAttic.png?width=600&height=400&name=DiscoloredDeckingFromtheAttic.png)

This 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. 

## What do you need to know before replacing your roof in Nashville, TN?

Now you know the signs that a roof is failing in Nashville, TN. Unfortunately, you’ll most likely need a roof replacement if your roof has any of the signs of failure mentioned here. 

However, you won’t know what your roof needs until after an inspection from a local Nashville roofing contractor. Just know that this begins the roof replacement process if you do have a failing roof, which is full of big decisions. 

On top of this, it’s also where Nashville homeowners get taken advantage of by bad roofers. I want you to be fully prepared when we or another Nashville roofer comes to your home. 

That’s why I wrote another article breaking down everything Nashville homeowners need to know before they get a new roof.

If you’re ready to get started, [Get a Free Quote here](https://www.billraganroofing.com/quote) or call our office at [(615) 242-0333](tel:1-615-242-0333) today to schedule your free roof replacement estimate.

Check out [7 Things to Know Before Replacing Your Roof in Nashville, TN,](https://www.billraganroofing.com/blog/need-know-replacing-roof-nashville) to learn what you need to keep in mind when starting the roof replacement process.

[![New call-to-action](https://no-cache.hubspot.com/cta/default/3406853/54aa3963-da66-453d-b8b6-0bf1d6a40900.png)](https://cta-redirect.hubspot.com/cta/redirect/3406853/54aa3963-da66-453d-b8b6-0bf1d6a40900)

#### Table Of Contents

## Related Articles

[### Can You Use Multiple Types of Roofing Materials on a Roof?

 July 1st, 2026|6 min read 

](https://www.billraganroofing.com/blog/have-different-types-roofing-materials-roof)

[### How Often Does a Roof Need to be Replaced?

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](https://www.billraganroofing.com/blog/how-often-replace-roof)

[### Does a New Roof Increase Your Home’s Value?

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](https://www.billraganroofing.com/blog/does-new-roof-increase-home-value)

[### Does a New Roof Increase Your Home’s Curb Appeal?

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](https://www.billraganroofing.com/blog/curb-appeal-new-roof)

[### What’s the Average Cost to Replace a Roof? (2026 Update)

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](https://www.billraganroofing.com/blog/average-cost-replace-roof)

[### Metal Roofing vs. Asphalt Shingles: Which is Right for You?

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[### 4 Options to Consider If You Can’t Afford a New Roof

 April 17th, 2026|7 min read 

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[### Standing Seam Metal Roof vs. Cedar Shake Roof: Which is Right for You?

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[### What are the Signs of a Bad Roofing Job?

 April 13th, 2026|8 min read 

](https://www.billraganroofing.com/blog/signs-bad-roofing-job)

[### 7 Things to Consider Before a Roof Replacement

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[### 7 Things to Know Before Replacing Your Roof in Nashville, TN (2026)

 April 8th, 2026|13 min read 

](https://www.billraganroofing.com/blog/need-know-replacing-roof-nashville-tn)

[### 9 Ways to Prepare for a Roof Replacement in Nashville, TN

 April 6th, 2026|7 min read 

](https://www.billraganroofing.com/blog/ways-prepare-for-roof-replacement-nashville-tn)

[### 10 Frequently Asked Questions Before Getting a New Roof

 April 3rd, 2026|15 min read 

](https://www.billraganroofing.com/blog/frequently-asked-questions-before-getting-a-new-roof)

[### How Much Does a New Roof Cost in 2026? (Update)

 March 30th, 2026|12 min read 

](https://www.billraganroofing.com/blog/new-roof-cost)

[### 8 Warning Signs You Need a New Roof

 March 27th, 2026|8 min read 

](https://www.billraganroofing.com/blog/warning-signs-need-new-roof)

[### How Long Does a New Roof Last?

 March 25th, 2026|11 min read 

](https://www.billraganroofing.com/blog/how-long-new-roof-last)

[### When Is the Best Time to Replace a Roof in Nashville, TN?

 March 13th, 2026|9 min read 

](https://www.billraganroofing.com/blog/best-time-replace-roof-nashville-tennessee)

[### How Do You Pay for a New Roof?

 December 24th, 2025|5 min read 

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[### How Long Does It Take to Replace Your Asphalt Roof?

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[### What is Roof Underlayment?

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[### How Long Does It Take to Replace a Roof in Nashville, TN?

 November 28th, 2025|6 min read 

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[### What is Roof Decking?

 November 7th, 2025|7 min read 

](https://www.billraganroofing.com/blog/what-roof-decking)

[### Why Does a New Roof Cost So Much? (2026 Update)

 October 29th, 2025|7 min read 

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[### What Should My Roof Estimate Include?

 October 17th, 2025|10 min read 

](https://www.billraganroofing.com/blog/what-roof-estimate-include)

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