Should I Use Polyester Membrane On My Coated Roof?

Tile roofs are one of the most durable roofing systems in Southern Arizona. Clay and concrete tiles can last 50 years or more, standing up to intense sun, monsoon rains, and desert temperature swings. However, while the tiles themselves are long-lasting, the underlayment beneath them is not.

At Desert Sky Roofing, we often meet Tucson homeowners who believe a tile roof can’t leak simply because the tiles still look good. In reality, the underlayment is the true waterproof barrier, and when it fails, leaks can occur even when tiles appear intact.

Why Tile Roof Underlayment Fails in the Tucson Climate

Tucson’s roofing environment is uniquely harsh. Extreme UV exposure, summer monsoons, and dramatic temperature changes cause traditional roofing materials to age faster than in milder climates.

Common causes of tile roof underlayment failure include:

• Heat-related brittleness and cracking
• Water intrusion during monsoon storms
• Age-related deterioration (typically 20–25 years)
• Improper installation by previous roofing contractors

Once underlayment begins to fail, patching the roof is rarely effective. The long-term solution is a tile roof underlayment replacement, also known as a lift and lay tile roof system. 

What Is a Lift & Lay Tile Roof Replacement?

A lift and lay tile roof replacement allows homeowners to preserve their existing tiles while replacing the aging materials underneath. This process avoids unnecessary tear-off, reduces waste, and restores your roof’s waterproofing system. Most reputable Tucson roofers should explain to you the process of what a lift and lay process includes, but here is a quick understanding.

Our Proven Tile Roof Replacement Process

1. Careful Tile Removal and Protection

Reusable tiles are carefully removed and set aside to protect their integrity. Landscaping and property are protected throughout the project.

2. Removal of Old Roofing Materials

Old underlayment and battens are removed down to the roof deck, allowing for a thorough inspection of the structure.

3. Roof Deck and Fascia Repairs

If damage is found:

• Most roofing companies in Tucson include up to one 4’×8’ sheet of decking that may be replaced, but they will replace all the sheets that are needed.  Extra sheets usually have an upcharge.
• Rotted fascia boards are repaired as needed. This ensures your new roofing system starts on a solid foundation.

4. New Drip Edge, Birdstops, and Flashings

We install new galvanized drip edges and birdstops to control water flow and prevent pest entry. All roof penetrations are re-flashed, and new valley pans are installed with ice and water shield for added protection.

5. High-Performance Underlayment Installation

We install Perma-Tech XPU high-temperature synthetic underlayment, engineered specifically for extreme heat and rated up to 50 years. Homeowners may also choose Polyglass TU-MAX 30-year underlayment, both backed by our workmanship warranty.

6. Battens, Tile Reset, and Final Sealing

New wood battens are installed, tiles are reset, broken tiles are replaced, and new weather block and mortar caps are applied to complete the system.

Why Desert Sky Roofing Is Different

Not all roofing companies in Tucson approach tile roof replacements the same way. At Desert Sky Roofing, our process is guided by our R.A.I.S.E. core values:

• Results: Long-term solutions, not temporary fixes
• Accountability: Clear scopes, honest pricing, no surprises
• Integrity: If you don’t need work, we’ll tell you
• Service: Respect for your home and your time
• Excellence: Materials and craftsmanship built for the desert

We document our work, explain every recommendation, and never pressure homeowners into unnecessary upgrades.

When Should You Replace Tile Roof Underlayment?

If your Tucson home has a tile roof that is 20 years or older, shows interior water staining, or has experienced monsoon-related leaks, it’s time for a professional inspection. Waiting too long can lead to decking damage, mold growth, and costly interior repairs.

A proactive tile roof underlayment replacement can extend the life of your roof for decades and protect your home through Arizona’s toughest weather.

When Tile Damage Requires Targeted Repairs

Not every tile roof issue immediately requires a full underlayment replacement. In some cases, cracked, slipped, or broken tiles are the primary source of the problem. Individual tiles can be damaged by foot traffic, wind uplift, or debris during monsoon storms, allowing water to reach the layers below.

When damage is isolated, tile roof repair can be an effective solution to restore proper water shedding and prevent further deterioration. Addressing broken or displaced tiles early can help extend the life of your roof and delay more extensive work.

However, if repairs become frequent or leaks persist despite intact tiles, it often points to a failing underlayment beneath the surface, at which point replacement becomes the more reliable long-term option.

Get a Free Tile Roof Replacement Estimate in Tucson

If you’re concerned about the condition of your tile roof—or simply want peace of mind—Desert Sky Roofing offers free, no-obligation tile roof replacement estimates.

We’ll inspect your roof, show you exactly what we find, and provide honest recommendations you can trust.

Contact Desert Sky Roofing today or request your free tile roof replacement estimate and experience what it means to work with a roofing company committed to legendary results.