Tile Roofing
The Lift-and-Relay Process, Step by Step, From a Carlsbad Tile Roofer
Lift-and-relay is the workhorse of tile roofing, and most homeowners have no idea what it involves. Here's the actual sequence we follow on a North County tile roof, and why each step matters.
What happens during a tile roof lift-and-relay?
In a lift-and-relay, we carefully remove and stack the existing tile, strip off the old failed underlayment down to the deck, inspect and repair the sheathing, install new underlayment and flashing, replace any broken or damaged tile, then reset the salvaged field tile back into place. The tile is reused; the waterproofing layer underneath is what actually gets renewed. Done properly it renews the roof's watertight life for decades.
Why 'lift-and-relay' exists at all
A tile roof is really two systems stacked together. The tile is the armor, the sun and impact shield that lasts half a century or more. Underneath it, the underlayment is the actual waterproofing, and it wears out far sooner. When the underlayment fails but the tile is still good, you don't need to buy new tile; you need to renew the layer beneath it. That's a lift-and-relay.
Understanding that division is the key to the whole process. Everything we do during a relay is about renewing the hidden waterproofing while preserving the expensive armor on top.
Step 1: Careful removal and stacking
We start by loading the roof out, removing tile row by row and stacking it in organized bundles on the roof and ground. This is slower and gentler than a tear-off because the goal is to preserve as much tile as possible. Rushed removal cracks tile, and every piece we break is a piece we have to source and replace.
On coastal homes in Encinitas or Solana Beach, we handle even more carefully because salt-aged tile is more brittle. We track our breakage as we go so we know exactly how many replacement pieces we'll need before we start setting tile back down.
Step 2: Strip the old underlayment and inspect the deck
With the tile off, we strip the failed underlayment down to the roof deck. This is the moment we finally see the sheathing, and it's often the most valuable part of the whole job. Old leaks leave stains, soft spots, and sometimes rotted plywood that no one could see with the tile in place.
We repair or replace any compromised decking now, while it's exposed. Skipping this is how a fresh-looking roof leaks a year later. A relay is only as good as the deck it's built on.
Step 3: New underlayment, flashing, and details
Now we install fresh underlayment across the whole deck. On our coastal jobs we favor durable synthetic or high-grade membrane underlayment because it handles heat and longevity better than old-school felt. We also renew the metal: valley flashing, headwall and sidewall flashing, and pipe boots. In salt air these metals corrode, and replacing them during a relay is far cheaper than doing it later.
This step is the entire point of the relay. The tile going back on top is just protecting this new waterproofing layer.
Step 4: Reset the tile and replace breakage
Finally we reset the salvaged tile back into the field, swapping in replacement pieces for whatever broke during removal. We work to match the original layout and coursing so the finished roof looks unchanged from the street. Ridge, hip, and rake tile get reset and re-secured, and we point up the mortar or use the appropriate fastening for the profile.
When it's done right, a relayed roof looks identical to how it looked before, but everything that actually keeps water out is brand new.
The sequence at a glance
Here's the full relay laid out in order, with what each step is really protecting against.
| Step | What we do | Why it matters |
|---|---|---|
| 1 | Remove and stack tile | Preserve reusable tile, track breakage |
| 2 | Strip old underlayment | Expose the deck for inspection |
| 3 | Inspect and repair deck | Catch hidden rot before it's buried again |
| 4 | New underlayment | Renew the actual waterproofing |
| 5 | New flashing and boots | Replace corroded coastal metal |
| 6 | Reset tile, replace breakage | Restore the original look |
The relay that caught rotten decking just in time
A San Marcos homeowner hired us for a straightforward lift-and-relay. The tile was sound, the underlayment was clearly at end of life, and the plan was simple: lift, re-underlay, reset. Nothing dramatic expected.
Then we stripped the old underlayment off the back slope and found it. A section of decking around an old, poorly flashed skylight had been quietly rotting for years. The tile and underlayment above had hidden it completely; from inside the attic you'd have seen only a faint stain. Left buried under fresh underlayment, that soft deck would have kept degrading and eventually failed.
Because the deck was exposed during the relay, we cut out the rotted plywood, replaced it, and re-flashed the skylight properly before laying the new underlayment. The homeowner got a genuinely sound roof instead of a good-looking one hiding a problem. That's the real value of doing every step of a relay in order rather than cutting corners on the parts nobody sees.
Key takeaways
- A tile roof is two systems: durable tile over shorter-lived underlayment
- Relay renews the waterproofing while reusing the tile
- Careful removal minimizes breakage and salvages your tile
- Stripping underlayment exposes the deck for critical inspection
- New flashing during a relay heads off costly coastal corrosion
- A finished relay looks unchanged but is watertight-new underneath
Frequently asked
How long does a lift-and-relay take?
Is my roof exposed during the relay?
Will the roof look different afterward?
Do you really replace the flashing every time?
Have a roof question we didn't cover?
Ask us during a free inspection. Straight answers, no pressure.