Metal Roofing in Mill Valley, CA

What Metal Roofing Involves

Metal roofing is a complete roofing system using steel, aluminum, or copper panels—either standing-seam or metal shingles—installed over a solid deck. Unlike asphalt shingles that need replacement every 15–20 years, metal roofing resists rot, decay, and granule loss. It also reflects solar heat, cutting cooling costs by up to 25% in Mill Valley's mild summers.

We install three main types: standing-seam (panels with raised interlocking seams), metal shingles (stamped to mimic slate or wood), and corrugated panels (for sheds and outbuildings). For most Mill Valley homes, 24-gauge steel with a Kynar 500 finish is the best value—it handles salt air from the Pacific and the fog that rolls over Mount Tamalpais.

A proper metal roof starts with a full tear-off. We remove the old shingles, inspect the deck for rot or sag, and replace any damaged plywood. Then we lay a self-adhered ice-and-water shield over the entire deck—not just the eaves. This is critical in Mill Valley because winter rains come in horizontal sheets, and wind-driven moisture wicks into any gap.

We fasten panels with ring-shank nails and clips that allow for thermal expansion. Metal expands and contracts with temperature swings; if panels are nailed too tight, they can buckle or split. Our crews stagger the seams and start with a starter course at the eaves, then work in field courses up the roof. Every penetration—chimneys, skylights, vents—gets custom flashing and sealant.

Cost of Metal Roofing in Mill Valley

Metal roofing costs between $12 and $25 per square foot installed in Mill Valley, depending on material and roof complexity. A typical 2,000-square-foot home runs $24,000 to $50,000. Standing-seam steel is the most common; aluminum is slightly more expensive but better in salt air. Copper runs $30–$45 per square foot and is rare—mostly for architectural accents.

That price includes the tear-off, deck repair (up to 10% of the deck), underlayment, flashing, trim, and cleanup. It does not include gutter replacement or skylight installation, which we quote separately. We provide a free written estimate after measuring your roof and checking the deck condition.

Financing is available, and metal roofs often qualify for insurance discounts because they resist hail and wind better than asphalt. Some Mill Valley homeowners also get a federal tax credit for energy-efficient metal roofs—check current IRS rules for the 25C credit.

Signs You Need Metal Roofing

If your current roof shows any of these, it's time to consider metal:

• Shingles are curling, cracking, or losing granules—end-of-life wear.
• Water stains on ceilings or walls, meaning leaks are seeping through.
• Daylight visible through the roof deck.
• Moss or algae growing on asphalt, trapping moisture and causing rot.
• High energy bills from poor attic insulation and heat gain.
• You're planning to stay in your home for 20+ years and want a one-time solution.

Metal roofing is also a smart choice if you live in a high-fire-risk area near Muir Woods or the Golden Gate National Recreation Area. Class A fire-rated metal roofs are the gold standard for wildfire defense.

Our Installation Process

Here's what happens when you hire Mill Valley Roofing:

1. Inspection and estimate. We climb your roof, measure every plane, check the deck, and note any rot or sag. You get a fixed-price quote—no surprises.
2. Tear-off. We strip the old roofing, haul it away, and repair the deck. We use ring-shank nails for new plywood and sweep the deck clean.
3. Underlayment. We roll out a self-adhered membrane over the entire deck. This is the waterproof layer that protects your home if a panel is ever damaged.
4. Panel installation. We install the starter course, then field courses with staggered seams. Panels are secured with clips and fasteners rated for 120-mph winds—more than enough for Mill Valley's worst storms.
5. Flashing and trim. Every valley, ridge, and penetration gets custom metal flashing. We hand-seal all exposed fasteners and caulk around vents.
6. Cleanup and inspection. We magnetically sweep the yard for nails, check the roof for any missed fasteners, and walk you through the finished job. We take photos for your records.

Most metal roofs take 3–5 days to install, depending on size and complexity. We work in all seasons, but winter installs are scheduled around rain—we won't leave your home exposed.

Warranty and Insurance

Metal roofing comes with two warranties: the manufacturer's finish warranty (30 years, covering fading and chalking) and our workmanship warranty (50 years, covering leaks and installation defects). We register every job with the manufacturer so your warranty is fully transferable if you sell.

If your roof was damaged by a storm, most homeowners' policies cover metal roof replacement. We'll document the damage, work with your adjuster, and make sure you get the coverage you're owed. We've handled dozens of storm-damage claims in Mill Valley—from hail on the ridge to wind-lifted panels in Strawberry.

Why Mill Valley Roofing

We've been serving Mill Valley since 2005, with a GAF Master Elite certification and an A+ BBB rating. Our crews are local—they know the fog, the rain, and the salt air. We've installed metal roofs in Alto, Cascade, Homestead Valley, and Muir Beach, and every job passes inspection on the first try.

We don't subcontract. The crew you meet is the crew that works. We're licensed, bonded, and insured, and we stand behind every roof with a satisfaction guarantee. If a seam leaks, we fix it free—even if it's 20 years down the road.