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A roofer replacing old shingles

Deciding when to replace your roof is a significant home improvement decision that impacts not only the aesthetic appeal of your home but also its structural integrity and value.

Understanding the signs that indicate the need for a new roof can save you from costly repairs in the future and ensure your home remains safe and comfortable.

This article will walk you through the 6 common signs for a roof replacement and recommendations on the best time to get a new roof.

6 Common Signs You Need A New Roof

Identifying the need for a new roof is crucial for home maintenance. Here are the 6 warning signs you need to look out for:

1. Visible lights and roof leaks

A roof that’s leaking

Noticing light in your attic signals roof vulnerabilities that could worsen. These gaps can allow water, snow, or pests in, risking internal damage like compromised insulation and structure. Regular inspections help catch these issues early, reducing the need for urgent repairs.

A leaking roof indicates immediate repair needs and suggests broader roofing system problems. They can harm structural elements and promote mold growth, risking occupant health. Promptly addressing leaks prevents further damage, preserving your roof’s integrity and your home’s well-being. Ignoring these signs highlights the importance of timely roofing assessments and possible replacement.

2. Curling, cracked, or missing shingles

A roof with curling shingles

The condition of your roof’s existing shingles is a direct indicator of its overall health and longevity. When shingles begin to curl, crack, or go missing, it is a sign that they are no longer providing the necessary protection for your home. These issues typically arise from exposure to environmental factors such as extreme temperatures, wind, and rain, which cause the materials to age and weaken over time.

Curling asphalt shingles, which may turn upwards or downwards, suggest that the edges of the shingles are no longer flat and secure against the roof, creating potential entry points for water. Similarly, cracked shingles present a clear pathway for water to seep through, leading to a leaky roof and compromising the roof’s structural integrity. When shingles are missing entirely, the exposed areas of the roof are at an increased risk of damage from the elements, particularly during heavy rain or snow.

3. Excessive loss of granules in your gutters

Excessive loss of granules in your gutters indicates shingle deterioration, hastening your roof’s aging process. This degradation compromises protective coatings, leaving your roof vulnerable to the sun’s UV rays and necessitating replacement.

When your gutters consistently collect granules, it’s a clear sign of shingle decay. The loss of these protective elements accelerates roof aging, making it susceptible to UV damage and requiring a replacement to maintain structural integrity.

4. Your roof is nearing the end of its lifespan

An old shingle roof that’s partially damaged

When your roof is nearing the end of its expected lifespan, it’s a critical time to evaluate the necessity for a new roof installation. The longevity of your roof largely depends on the type of roofing material used, as well as the quality of the installation and the level of roof maintenance it has received over the years.

For homeowners with a shingle roof, recognizing that these materials typically last between 20 to 25 years is vital. In contrast, metal roofs, known for their durability, can protect your home for 40 years or more. If your existing roof is old or you’re experiencing frequent issues, it may be more cost-effective in the long run to replace your roof rather than continually repairing it.

In addition to the functionality, an outdated roof can negatively impact your home’s curb appeal and potentially its resale value. If your roof is at or beyond its typical lifespan, consulting with a professional for a thorough roof inspection can help you decide whether a roof repair might suffice or if a complete roof replacement is necessary.

5. Corrosion and Rust for Metal Roofs

A metal roof with rust that needs to be replaced.

For homeowners who have opted for metal roofing, the appearance of corrosion and rust spots serves as a warning sign of underlying moisture damage, posing a threat to the structural stability of the roof. Timely intervention to tackle these issues is crucial to forestall the onset of more severe complications. However, if left unchecked, widespread corrosion may escalate to a point where a complete roof replacement becomes unavoidable.

Detecting signs of corrosion and rust on metal roofs is vital for homeowners, as these indicators hint at potential moisture-related harm that can compromise the structural integrity of the roof over time. Swift action to address these concerns is essential to mitigate the risk of escalating problems. Nevertheless, in cases where corrosion has extensively infiltrated the roofing material, the possibility of requiring a comprehensive roof replacement looms large as the most viable solution.

6. Sagging or Uneven Roof Sections

The sight of a sagging roof or the emergence of uneven sections across your roofline is an unmistakable signal of underlying structural complications, potentially stemming from prolonged exposure to water damage or shortcomings in the roof’s initial construction.

These telltale signs not only raise grave safety concerns but also necessitate urgent intervention to halt any further degradation. In many cases, addressing these issues may require nothing short of a total roof replacement to safeguard the structural soundness and longevity of your property.

Identifying a sagging roof or irregularities on your roof surface underscores fundamental structural challenges that may have developed due to persistent water damage or substandard construction practices. These issues not only jeopardize the safety of your home but also demand immediate remediation to prevent worsening conditions. Often, addressing these concerns comprehensively requires a full replacement, and ensuring the restoration of structural integrity and resilience for the long term.

What time of the year is best for a new roof?

A house with a new roof installed

In Ontario, Canada, late spring to early fall is generally considered the best time for roof replacement, similar to many other regions. This period typically offers milder temperatures and lower chances of precipitation, providing optimal conditions for roofing installations.

Specifically, the months of May through September tend to offer the most favorable weather for roofing projects in Ontario. During these months, you can expect drier conditions with moderate temperatures, which are conducive to the proper installation and curing of roofing materials and adhesives.

However, it’s essential to keep in mind that weather patterns can vary, and unexpected rain or storms can occur even during these months. Therefore, it’s crucial to work with a reputable roofing contractor who can plan accordingly and take necessary precautions to mitigate any weather-related risks during the installation process. Additionally, scheduling your project well in advance is advisable, as roofing contractors in Ontario may experience high demand during the peak season.


Timely recognition of the signs you need a new roof can prevent minor issues from escalating into major problems, ensuring your home remains safe, secure, and visually appealing. If you notice any of the signs mentioned above, consider consulting with a roofing professional to determine the best course of action. Remember, investing in your roof is investing in the protection and value of your entire home.


Should I repair my roof instead of replacing it?

Sometimes complete roof restoration is not necessary. Minor roof damage such as a few damaged shingles or curling shingles can be repaired in some cases. It’s recommended to consult with a roofing contractor for optimal results.

What is the best time to replace your roof?

The best time to replace your roof is during the fall. This season is preferred for roof repairs and renovations due to the mild weather conditions in spring and early summer, which provide consistent conditions ideal for such work.

What is the average lifespan of a roof?

The normal life of a roof depends upon the quality, durability, and the material used for roofing it. Generally, you’re getting your cost back so make sure the most expensive options need replacing sooner. Metal roof tiles are usually cheaper than asphalt ones but they can last a lot longer.