I often wonder if people who are not in the roofing industry ever look at their roof—or even notice it. Even when you’re hanging Christmas lights, do you pay attention to its condition?
Here in the Phoenix area, tile roofs dominate. While there are still plenty of shingle roofs, virtually all new home builders install concrete tile roofs on their homes.
If you found this article, you were likely searching for tile roof maintenance tips. The internet is full of advice on shingles and how to prevent algae, but that’s not as relevant in our dry desert climate. When I couldn’t find much information specifically about caring for tile roofs in Phoenix, I decided to create this article to share my insights.
How Long Does a Tile Roof Last?
A well-built tile roof following today’s standards should last a minimum of 15 years, with many lasting 30 years or more. Several factors affect longevity, including:
- Underlayment quality – The underlayment is the true waterproofing layer of your roof. While tiles provide durability and protection from direct sunlight, they are not waterproof. The underlayment, installed beneath the tiles, acts as a barrier against moisture, preventing water from reaching the structure of your home. In Phoenix’s extreme climate, it is critical to choose an underlayment that can withstand high heat, UV exposure, and rapid temperature changes that occur during monsoon season. A poor-quality underlayment can deteriorate prematurely, leading to leaks and costly repairs.
- Environmental conditions – The summer monsoons and rapid temperature swings can wear down materials over time.
- Pest issues – Birds are one of the biggest threats. Their acidic droppings can quickly deteriorate underlayment. If you see pigeons nesting on your roof, act fast. If they’ve already settled in, call a bird removal expert—it’s far cheaper than a roof replacement.
- Roof debris – Leaves, tree limbs, and debris can clog roof valleys, preventing proper water drainage. This can lead to water dams, which allow moisture to back up under the roofing system, causing leaks.
With quality underlayment and regular maintenance—keeping the roof clear of debris and pests—your tile roof could last 40+ years before needing replacement.
How Much Does a New Tile Roof Cost?
The cost of a new tile roof depends on various factors:
- Ease of access – If a dumpster can be placed near the roofline for debris disposal, costs are lower. Otherwise, extra labor is required to transport debris safely.
- Roof pitch – Steeper roofs (above 6:12 pitch) increase labor costs due to additional safety precautions and slower installation. Workers are paid more for steeper jobs, and materials must be hand-loaded.
- Tile type – Concrete tile is the most cost-effective. Clay or sandcast tile is significantly more expensive and harder to repair.
Estimated costs:
- Tile remove & reset (3000 sq. ft. roof): ~$10,000
- New tile roof (3000 sq. ft. roof): ~$15,000
Every roof is different. These numbers are rough estimates—getting a free estimate from a professional is the best way to determine your actual costs.
Do I Need to Replace My Roof Tiles?
Most of the time, no. Your existing tiles can often be reinstalled. However, you may need to replace your tiles if:
- The manufacturer no longer makes your tile’s profile or color, making it difficult to find a match.
- Your tiles are damaged beyond repair. In rare cases, manufacturer defects cause tiles to crumble over time. If the manufacturer is no longer in business, full replacement may be necessary.
- If you must replace some tiles, roofers typically install them in less visible areas. However, in some cases, mismatched tiles may be unavoidable.
How Much Does it Cost to Replace the Underlayment on a Tile Roof?
The cost of tile roof underlayment replacement varies depending on several factors:
- Roof pitch – Most Phoenix roofs have a 4:12 to 6:12 pitch, which is manageable. Anything steeper increases costs due to additional labor, safety protocols, and slower installation.
- Access – If materials and debris must be carried by hand due to limited access, labor costs rise.
- Type of tile – Concrete tile is the most common and affordable, whereas sandcast or clay tile is more expensive and requires extra care during removal and replacement.
For a standard concrete tile roof (3000 sq. ft.), you should budget $10,000-$15,000 for underlayment replacement. However, each roof is different, so getting an estimate is essential.
Choosing the Right Underlayment for Your Tile Roof
Your underlayment is the true waterproofing system of your roof—do not skimp on quality!
Common underlayment options:
- Minimum required (ASTM D226 Type II 30 lb. felt) – Not recommended.
- 40 lb. felt – A step up for a slightly longer lifespan.
- Two layers of 40 lb. felt – Even better protection.
- Self-adhering tile underlayment – The best choice for longevity.
Your money is best spent on a high-quality underlayment rather than unnecessary cosmetic upgrades.
The Key Components of Tile Roof Installation
Tile roofs are designed for pitched surfaces to allow for fast water runoff. The most important aspect of tile roofing is the underlayment. Here’s what the process involves:
- Underlayment Installation – This is the true waterproof barrier of your roof. Roofers start at the bottom and work their way up, overlapping layers for maximum protection.
- Batten Installation – Battens lift tiles off the underlayment, allowing better airflow and water drainage. Upgraded battens are worth the small extra cost, as they increase roof longevity.
- Flashings – Various metal components protect key areas, including:
- Eave metal
- Bird stop (prevents pest intrusion)
- Weather blocking
- Valley metal
- Roof-to-wall metal
- Pipe penetrations (should have two flashings: aluminum and galvanized)
- Chimney Protection – If you have a chimney, a cricket (a small ridge) may be needed to direct water away from the base.
- Ventilation Adjustments – If a room in your home is hotter than the rest, additional attic vents might help balance airflow.
For more details on tile roof installation, check out the Tile Roofing Institute’s installation guide at https://tileroofing.org/industry/installation-guides/.
Signs You May Need to Replace Your Tile Roof
Unlike shingles, tile roofs hide problems—you often don’t see issues until they become leaks. To avoid serious damage, consider annual roof inspections.
Signs your roof may need replacement:
- Aging underlayment (10-15+ years old) – Signs of deterioration include brittleness, shrinking, or curling.
- Leaks at roof penetrations – Bathroom vents, ceiling light fixtures, and A/C ducts are common leak spots.
Water stains on eaves – Walk around your home and check for staining under your roof’s overhang.- Attic moisture stains – If you can, take a flashlight into your attic (in cooler months) to check for water damage.
- If you have multiple leaks and your roof is over 20 years old, it might be time for a full replacement. However, not every leak means you need a new roof—get multiple estimates before making a decision.
A good resource for finding licensed, reputable roofing contractors in Phoenix is the Arizona Roofing Contractors Association at www.azroofing.org.
Should I Get Tile Roof Maintenance and How Often?
How Often Should Tile Roofs Be Maintained?
- New Roofs – No maintenance is needed for the first 10 years if you have annual inspections.
- After 10 Years – Routine maintenance is recommended.
- High-Debris Areas – Roofs under trees or near birds may need maintenance every 6 months.
Typical tile roof maintenance includes:
- Clearing debris
- Resealing pipes
- Repairing mortar joints
- Replacing broken/missing tiles
- Re-securing slipped tiles
Most tile roofs require maintenance every two years, but this depends on your environment.
Do I Need to be Home For the Roof Inspection?
Yes, you and your spouse or anyone who is responsible for making choices should be home if possible. There are a lot of decisions to be made when choosing to purchase a new roof and if this is your first time, you might be a little overwhelmed with the options. Once the contract is signed and products are ordered you don’t want to change your mind on colors or products. It can cost you money. We dislike change orders just as much as our customers do and try to never go back asking for more money. One way that is unavoidable is when we purchase the material and it is delivered and someone doesn’t like it. I am sure it has never happened to you but occasionally one spouse picks something out and the other spouse doesn’t like it. An argument ensues and now we have a change order because we can’t take the product back. It is just easier for everyone if all decision-makers are there to talk about roof concerns and options.
About the Author
Valorie Brown-Miller (aka “The Girl on the Roof”) has been in the roofing industry for close to 30 years. She was born and raised in Phoenix. Her first job at JBS Roofing was climbing on roofs, finding leaks, and providing estimates on commercial buildings. She then moved to the new construction division, negotiating contracts and building relationships with general contractors. In 2010 she was put in charge of restarting the residential division at JBS Roofing and was made Vice President in 2011. She recently took over the role of President of JBS Roofing following her father’s retirement. She is the past President of the BNI chapter Arrowhead Legends, Co-Chair of the Marketing and Membership Committee for the Arizona Roofing Contractors Association, sits on the Convention Committee and volunteers on their multiple charity events as well. Her husband Larry Miller has worked in the roof industry for almost 50 years and they have 5 children.
