Tile Roofs in Arizona: Is It Time to Replace Your Underlayment?

Tile roofs are one of the most popular roofing choices in Arizona, known for their durability, aesthetic appeal, and ability to withstand the harsh desert climate. Often, homeowners believe that a tile roof can last a lifetime, which is partially true. The tiles themselves, made from materials like clay or concrete, are incredibly durable and can last for 50 years or more. However, there is a critical component beneath the tiles that is often overlooked and is responsible for the greatest part of prohibiting water intrustion into the home—the underlayment.

The underlayment is the actual waterproofing layer of your roof. Its job is to prevent water from penetrating into your home. Over time, this underlayment wears down and actually disintegrates over time, especially in Arizona’s hot and dry conditions. Typically, homeowners start to notice issues such as leaks and water damage around the 15-20 year mark, with most leaks appearing at around 17 years.

The Role of Underlayment in Tile Roofs

While the tiles provide an important layer of protection from sun exposure and physical damage, they are not the primary defense against water. The underlayment beneath the tiles is what keeps your home dry, serving as a waterproof barrier. In Arizona’s desert climate, where monsoon rains and intense sun alternate throughout the year, the underlayment is exposed to constant wear and tear.

When Does the Underlayment Need to Be Replaced?

Though the tiles may last for decades, the underlayment typically starts to deteriorate much earlier. Over time, the sun’s intense heat breaks down the materials, while monsoon storms put pressure on any vulnerable spots. In most cases, leaks begin to appear after about 17 years, signaling that the underlayment has lost its effectiveness and needs to be replaced.

Common signs that your tile roof underlayment may need replacement include:

• Water leaks in your ceiling: If you notice water stains or wet spots in your home, especially after a rainstorm, it’s a clear sign that the underlayment is compromised.
• Tile shifting or cracking: If the tiles have shifted or cracked, the underlayment may be exposed to the elements, hastening its deterioration.
• Visible wear in the attic: Checking your attic for signs of water damage or visible sunlight can also indicate that the underlayment is failing.

How Often Should the Underlayment Be Replaced?

Generally, the underlayment on a tile roof should be inspected every few years, especially after the roof has been in place for more than 15 years. Depending on the quality of the initial underlayment and the intensity of the climate, you may need to replace it between 15 and 25 years. While this may seem like a short time in comparison to the lifespan of the tiles, the underlayment's integrity is crucial for preventing costly water damage to your home.

What Happens if You Don’t Replace the Underlayment?

If the underlayment is not replaced once it begins to fail, water can seep through, damaging the wooden structure of your roof and potentially causing rot, mold, and mildew. Over time, this can lead to far more expensive repairs than simply replacing the underlayment. Additionally, water damage can affect the insulation, walls, and ceilings, driving up repair costs even further.

Protect Your Roof Investment

Replacing the underlayment is a crucial part of maintaining a tile roof. When properly maintained, the combination of durable tiles and a solid underlayment can ensure your roof provides effective protection for decades. Ignoring the underlayment, however, can turn a relatively simple repair into a costly disaster.

If your tile roof is approaching the 17-year mark or you’ve noticed leaks or signs of wear, it may be time to have the underlayment inspected. TraVek Roofing, serving the Scottsdale and Phoenix areas, specializes in tile roof maintenance and underlayment replacement. Their experienced team can assess the condition of your underlayment and provide expert solutions to keep your home safe and dry.

Don’t wait until leaks cause significant damage—contact TraVek Roofing today at 480-367-1171 for an inspection and ensure your roof stays in peak condition for years to come.