Tile Roofing in Mill Valley, CA

What Tile Roofing Involves on a Hillside Home

Tile roofing is a layered assembly rather than a single sheet of material. On most Marin homes the roof deck carries an ice-and-water shield at the eave, a synthetic underlayment across the field, and battens that hold each tile off the substrate.

Clay and concrete tile are heavy. Before we add load, we check the rafters, joists, and ridge beam for sag, and we probe the plywood or OSB sheathing for rot where a leak has been wicking quietly for years.

Tile is the visible layer, and keeping water out is the job of everything underneath it. Get the underlayment wrong and the whole rooftop is decoration.

What sits under the tile

• Roof deck and sheathing: we probe the plywood for rot and decay before anything new is fastened down.
• Ice-and-water shield: a self-adhered membrane along the eave and up the valley, where wind-driven rain gets in first.
• Synthetic underlayment: it replaces old felt and tar paper, and it does the real waterproofing on a tile roof.
• Battens and counterbatten strips: fastened with ring-shank nails or screws so the tile sits above the deck and water can drain.
• Flashing: step flashing at sidewalls, counter-flashing at the chimney, apron flashing at head walls, drip edge at the rake and eave.
• Penetrations: pipe flashing and vent boots sealed with roof cement and a proper bead of sealant, not caulk smeared over the top.

Tile Roofing Materials We Work With

We match what is already on your roofline instead of steering you into a different product. On partial repairs we work from the spare tile most neighborhood homeowners keep behind the garage or under the deck.

• Barrel clay tile: heavy, long-lived profiles such as Ludowici and Gladding McBean, common on older valley homes.
• Flat concrete tile: Eagle and Boral interlocking profiles, frequently found on mid-century remodels.
• Mission-style S-tile: US Tile and Monier concrete, the replacement we quote most often.
• Slate, wood shake, and cedar shake: natural roofing that needs different fastening and more careful footwork.
• Metal panel, standing-seam panel, and corrugated panel: a good fit for porch roofs, awning and canopy sections, and low pitches.
• Low-slope areas: TPO, EPDM, PVC membrane, modified bitumen, and built-up roof over garages and flat additions.
• Asphalt shingles: architectural shingle, three-tab shingle, asphalt, and bitumen where tile weight is not practical.

Signs You Need Tile Roofing Repair

Tile hides its own failures better than any other roof surface. A cracked tile sheds water fine until the underlayment beneath it gives out, and by then the damage has reached the decking.

• Visible cracked or chipped tiles, which on hillside homes often trace back to seismic ground movement rather than age.
• Missing or displaced roof tiles, usually tile slippage caused by inadequate batten spacing.
• Leakage at interlocking joints from thermal cycling, as tile expands and contracts through the day.
• Broken tiles from wind-driven debris coming off the trees above the roofline.
• Water stains on interior ceilings, or paint blistering on an interior wall.
• Granule loss and tile grit collecting in the gutter and downspout, a sign of end-of-life wear.
• Moss or dark staining on north slopes, which is routine with coastal fog and morning moisture.
• Rust streaks under metal flashing, or old caulk that has dried and peeled away from a pipe boot.

What Tile Roofing Costs Depend On

Tile costs more per square than asphalt shingles, and most of that gap is labor and weight rather than material. Every estimate we write is a line-item estimate, so you can see where the money goes.

What drives the number: square footage and roof pitch, how much decking has to come out, whether battens and underlayment are replaced or we overlay a sound substrate, how many penetrations need new flashing, and how much hand-set work the hips, valleys, and dormers require.

A repair that resets slipped tile, replaces cracked pieces, and re-seals a leaking valley runs a fraction of a full roof replacement. We tell you plainly which one you actually need.

Our Tile Roofing Process, Step by Step

Tile work is slower than shingle work, and most of that time goes into the layers nobody sees. Here is how a typical job runs, from the first call to the final walk.

1. Roof inspection and estimate. We climb the ladder with a safety harness, check the rooftop, roofline, and every penetration, then send a line-item estimate. If the sheathing is soft underfoot, you hear it from us before you sign.
2. Permits and scheduling. Roof replacement over 50 percent of the roof area requires a permit under the California Building Code, and seismic bracing for tile roofs is part of that conversation. We pull the permit and schedule around the weather window.
3. Tear-off and staging. Crews strip the field course by course with pry bars and roofing shovels, and stage tile on the scaffold so nothing lands in the landscaping. The dumpster sits in the driveway and all debris leaves with it.
4. Deck repair, underlayment, battens. Rotting sheathing comes out and new plywood or OSB goes in, followed by ice-and-water shield, synthetic underlayment, and battens and counterbattens fastened with ring-shank nails.
5. Tile installation. We set the starter course at the eave, work upward in staggered courses, and hand-seal every cut at hips, valleys, dormers, and the chimney. Ridge cap and ridge vent go on last, checked with a roofing square.
6. Cleanup and final inspection. The nail gun, air compressor, and torch go back on the truck, a magnet sweeps the lawn for fasteners, and we hand you photos of the finished work plus the warranty paperwork.

Tile Roofing Details We Check on Every Roof

• Skylight curbs and dormer sidewalls get new step flashing and counter-flashing, the two spots we see leak most on remodeled homes.
• Chimneys get rebuilt counter-flashing and a checked cap, and we look at the masonry for spalling and cracked mortar joints.
• Parapet walls and coping on flat sections get a coating or a fresh membrane, and scupper drains get cleared so ponding water has somewhere to go.
• Mansard, gambrel, and steep gable sections get a closer look at the verge and rake, where wind uplift peels the edge first.
• Canopy and awning overhangs above doorways are checked for rot in the fascia, soffit, and the framing behind them.
• Ventilation matters as much as waterproofing: ridge vent, soffit vent, and attic fan are verified so the attic breathes, and insulation is checked for a vapor barrier that was installed face-down.

Insurance, Permits, and Warranty on Tile Roofing

Tile roofing claims are paperwork-heavy. We document storm date, photograph the damage, and hand you a scope that matches what the adjuster is looking at, which cuts down on supplemental claim back-and-forth.

• We work from the adjuster inspection report and provide our own line-item estimate for comparison.
• Underlayment has to meet California Energy Code Title 24 requirements for the permit to close.
• Tile roofs carry seismic bracing per California Building Code Chapter 15, and we build that into the scope instead of adding it later.
• Our workmanship warranty covers labor, and the tile manufacturer warranty covers material. We state both the same way every time we talk about them.

Why Tile Behaves Differently Around Mill Valley

High UV exposure fades tile color over the years, coastal salt air accelerates weathering on roofs near the water, and wildfire risk makes a Class A rating a practical requirement rather than a nice-to-have. Tile already meets it in most assemblies.

Heavy winter rains test every flashing detail, and freeze-thaw is a non-issue here, so ice dam problems are rare. That shifts the whole maintenance conversation toward flashing condition, drainage, and the condition of the underlayment you cannot see.