Tile Roofing
Clay & Concrete Tile. The 100-Year Roof

The Roof That Belongs on a Danville Mediterranean

A good tile roof is one of the handful of decisions that can genuinely last a lifetime. I installed my first clay tile roof in Alamo in 1989 — a Spanish Colonial on Livorna Road — and that roof is still up there, still shedding water, still looking the way it did the day we finished. The tiles haven't moved. The flashings have been touched up twice. The underlayment was replaced once, around year 28. That's the story tile tells when you do it right.

It's also the wrong call for plenty of homes, and part of my job is telling you when. So let's walk through what tile actually is, when it makes sense, and what the code and pricing look like in the East Bay right now.

What Is Tile Roofing

Roofing tile is either fired clay or high-pressure concrete. Clay tile is extruded or hand-shaped, kiln-fired at around 2,000°F, and the color is a product of the clay body itself plus any slip or engobe applied before firing. Concrete tile is Portland cement, sand, and pigment, vibrated or extruded into a mold and cured. Both products get installed over battens or direct-to-deck, lap each other in a way that sheds water off the face of each piece, and rely on an underlayment below for the actual watertight seal.

Clay runs roughly 950 pounds per roofing square. Concrete lands around 900 pounds per square. Asphalt shingle — for comparison — is about 240 pounds per square. You can see the framing issue coming.

Brands we install: Boral (now Westlake Royal) Saxony, Villa, and Barcelona profiles. Eagle Roofing's Malibu, Capistrano, Bel Air, and Golden Eagle lines — Eagle is headquartered in Rialto and we can get their stock in 48 hours for most East Bay jobs. MCA Clay Tile with the Corona Tapered Mission profile when a customer wants genuine Mexican clay. Redland and US Tile for price-point jobs. We'll also relay salvaged original tile when we're restoring an older Piedmont or Berkeley home where matching the existing profile matters more than anything else.

When Tile Makes Sense (and When It Doesn't)

Tile is the right call when three things line up: the architecture calls for it, the framing can handle the weight or can be reasonably reinforced, and you're planning to own the home long enough to get your money back on the upgrade. A Mediterranean or Spanish Colonial in Alamo, Orinda, Danville, Walnut Creek, or Piedmont with original framing already sized for tile — that's an easy conversation. You're replacing the underlayment and maybe 5 to 15% of broken tiles, keeping the rest, and you'll have a roof that outlives the rest of the house.

Here's my honest stance: tile isn't better than asphalt for every home. If your framing can't handle the weight without a substantial structural upgrade, and you're planning to sell inside five years, you won't get that money back. If your home is a 1970s tract in Antioch designed for composition, adding tile means sistering rafters, upgrading the ridge beam, and possibly engineering the load path down to the foundation. That's $15,000 to $30,000 of structural work on top of the roof. I'd put a quality architectural shingle up there instead and we'd both be happier.

The other place tile falls down is on low-slope roofs. Anything under 4:12 pitch, water moves too slowly and wicks under the headlaps. Tile wants 5:12 or better, minimum.

Brands and Product Lines We Install

Boral / Westlake Royal Saxony — our default concrete tile. Wide color palette, clean S-profile or flat options, consistent dimensional tolerance so the courses lay out straight. Fifty-year limited warranty.

Boral Villa — the flat profile version, popular for Craftsman and transitional homes in Walnut Creek and Lafayette where the homeowner wants a slate-like look at a fraction of the cost.

Eagle Roofing Malibu and Capistrano — Eagle is a California manufacturer, which matters for supply chain reliability and for the color-matched ridge and rake pieces. Bel Air is their premium flat tile, Capistrano is the classic two-piece mission profile.

MCA Clay Tile Corona Tapered Mission — when the job calls for real clay in the two-piece barrel profile, MCA is who we specify. It's more expensive, it's heavier, and it looks right on a 1920s Spanish Colonial in a way concrete never quite matches.

Redland and US Tile — we'll still install these when price is the controlling factor and the customer wants the performance floor without the premium aesthetics.

The Installation Process

Structural verification happens before we order material. If the home has tile on it already, we're usually fine — we'll pull a few tiles, inspect the underlayment and the framing from the inside, and confirm. If we're going from composition to tile, we're sending plans to a structural engineer for a load letter. Contra Costa County and Alameda County both want to see that letter in the permit package when the material weight is increasing significantly.

Tear-off is a careful operation on a relay job — we're stacking and storing the existing tile, discarding broken pieces, sweeping the deck clean, and inspecting every square foot of sheathing before we roll underlayment. For new tile, we're tearing off the existing shingle assembly, replacing any soft or delaminated sheathing, and installing new peel-and-stick or high-temp synthetic underlayment.

Underlayment is where I'll spend more of your money than you expect, and I'll defend it every time. For tile, the underlayment IS the waterproofing — the tiles themselves shed maybe 90 to 95% of the water, and the rest has to be handled by what's underneath. We run a three-tier system: standard 30-pound felt was the old default, but we've moved almost entirely to Tri-Flex XT synthetic or Titanium UDL50 for most jobs, and full peel-and-stick (GAF StormGuard or similar self-adhered membrane) on the valleys, headwalls, and the first six feet of the eaves. On Chapter 7A jobs in the fire zones, we're running peel-and-stick across the full field.

Battens versus direct-to-deck depends on the profile and the pitch. High-profile S-tile and barrel tile sit better on battens — the air gap behind them is part of why tile roofs run 20 to 30% cooler than shingle. Flat tile can go direct-to-deck with a nailable underlayment. Ridge tiles are either mortared in the traditional method or mechanically fastened with a Boral RidgeMaster system — we'll do either, and mechanical is our default for new installations because mortar cracks and you end up doing ridge work at year 15.

Kick-out flashing at every wall termination, headwall flashing tied to the wall counter-flashing, and valley metal sized for the actual drainage area. Flashings on a tile roof are 80% of the leak prevention.

Code Requirements in the East Bay

CRC R905.3 covers clay and concrete tile. Slope minimums (2.5:12 with double underlayment, 4:12 for single layer), fastener type, underlayment spec. R908.1 restricts overlays on tile — in most cases you're not overlaying tile, you're pulling it, re-underlaying, and relaying.

Chapter 7A applies in every VHFHSZ zone, which covers almost all the hillside premium tile markets — Orinda, Lafayette, Moraga, Alamo, the Oakland and Berkeley hills, upper Walnut Creek. Tile is naturally Class A, so the material checks that box automatically, but the assembly still needs Chapter 7A-compliant underlayment, bird-stop at the eaves, and ember-resistant vents.

Structural is the one that surprises people. Contra Costa County and the City of Oakland will both ask for an engineered letter when you're changing material weights. Budget $450 to $900 for that letter. If the framing needs reinforcement, we coordinate with the engineer and roll the work into the project.

Pricing and Timeline

Installed pricing for tile runs roughly $900 to $2,000 per square. A straightforward concrete tile job on a framing-ready Walnut Creek home, 30 squares, lands around $28,000 to $40,000. An authentic clay barrel-tile restoration on a 45-square Piedmont estate with custom-fabricated copper valleys can easily hit $80,000 to $95,000.

Lifespan is where tile earns its keep: 50 to 60 years for concrete, 75 years or more for clay, assuming you replace the underlayment once in the middle of that run. That mid-life underlayment job runs $10,000 to $20,000 because you're handling the tiles twice — it's real money and I want you to know about it before you sign a contract.

Timeline: two to three weeks for a standard relay, three to six weeks for a full new-tile install with structural work. Permit runs same-day to three days through the county portal, assuming the engineering package is in order.

East Bay Cities Where Tile Works Best

Alamo — classic tile market. Spanish Colonials, Mediterraneans, and custom estates with framing already sized for it. HOAs in Roundhill and Stone Valley generally require tile or approved equivalents.

Orinda, Lafayette, Moraga — Mediterranean and Tudor stock, heavy tile presence, hillside microclimates where the thermal mass matters.

Danville and Blackhawk — premium tract and custom homes, HOAs that specify tile profiles, framing built for it from the start.

Walnut Creek hills — Northgate, Walnut Heights, Saranap — lots of tile stock that needs relays rather than full replacements.

Piedmont — historic estates where matching or preserving original clay tile is the whole job.

Flatland Antioch, Brentwood, and Concord tract homes? Usually the wrong answer. Not because tile doesn't work there — it does — but because the math rarely pencils out when you're adding the structural cost and you're not recouping the premium on resale.

Frequently Asked Questions

Ready to Talk Specifics

If you're considering tile for a new build, a relay, or a full material upgrade, we'd rather start with a site visit than a phone bid. We'll check the framing, the existing underlayment condition, the pitch, and the code overlay for your specific parcel, then write you a real estimate with real numbers.

Call East Bay Roofers at (925) 722-4916, or request an estimate online. Founded 1988, C-39 licensed (CA #987654), GAF Master Elite and CertainTeed SELECT ShingleMaster certified, 4.9 out of 5 across 527 reviews. We've been doing tile relays and new installs across Alamo, Danville, Orinda, Lafayette, Walnut Creek, and Piedmont since the first Bush administration.