What is a refelt for tile roofs? (Underlayment replacement)
Last updated · Tile roofs
Short answer: A refelt (also called a lift-and-relay or tile underlayment replacement) means carefully removing concrete or clay tiles, replacing the aged underlayment and flashings, and reinstalling the sound tiles. The tiles often outlast the waterproofing layer beneath them.
Why tile roofs need refelts
InterNACHI lists clay and concrete tile lifespans of 100+ years in typical charts (and still very long in Florida). The underlayment — historically asphalt-saturated felt — ages much faster, especially under desert UV and attic heat in Phoenix, Tucson, Las Vegas, and similar markets. When the underlayment fails, leaks appear even though the tiles look fine from the street.
What the job usually includes
- Staging and removing tiles in sections;
- Tear-off of old felt or membrane;
- Deck repairs where needed;
- New underlayment (modern jobs often use high-temperature self-adhered or quality mechanically fastened systems approved for tile);
- New flashings at walls, penetrations, and valleys;
- Relay of undamaged tiles; replacement of broken tiles;
- Cleanup and often a manufacturer or workmanship warranty on the new waterproofing system.
Arizona and Florida context
In the Phoenix metro, older felt under tile systems are frequently discussed in the 20–25-year range before replacement is considered, sooner on hot south- and west-facing slopes. Florida tile roofs face wind, salt air, and hurricane fastening rules; underlayment and attachment must meet the Florida Building Code and product approvals. Reused tile must be sound — cracked or spalled tiles should be replaced, not reinstalled as if new.
Refelt vs. full tear-off to a new covering
Choose a refelt when the tile is largely intact and the structure can still carry tile weight. Choose a different system (or new tile) when too many tiles are damaged, the deck is failing, or you want a lighter assembly. Tile is heavy; structural capacity matters.
Licensing note (Arizona)
Residential roofing in Arizona generally requires an ROC R-42 license (small jobs under $1,000 that need no permit may fall under a limited exemption). Verify any contractor at the Arizona Registrar of Contractors.
Local building codes vary. Always verify requirements with your local building department and follow the manufacturer's installation instructions for the products installed.
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Frequently asked questions
How long does tile underlayment last?
It depends on product and climate. Older felt under desert tile is often discussed around 20–25 years; newer high-temp membranes are marketed for longer service. Inspection beats guessing.
Can you reuse the old tiles?
Often yes, if they are undamaged. Broken, cracked, or spalled tiles should be replaced. Local code and the installer determine what may be reused.
Is a refelt cheaper than new tile?
Usually, because you are not buying a full new tile field. Costs still include labor, underlayment, flashings, and broken-tile replacement — get a written scope.
See 2026 roof replacement cost in your city →
Sources
- InterNACHI, Standard Estimated Life Expectancy Chart. www.nachi.org/life-expectancy.htm
- InterNACHI, Estimated Life Expectancy Chart for Florida Homes. www.nachi.org/florida-life-expectancy.htm
- Tile Roofing Industry Alliance guidance (underlayment / tile systems); summarized via industry install manuals. www.tileroofing.org/
- Arizona ROC, License classifications. roc.az.gov/license-classifications
Sources checked November 4, 2026. Estimates are not quotes. Roofing, insurance, and legal details vary. Confirm with your contractor, insurer, or attorney.