Is a metal roof worth the cost in San Mateo County? Standing seam vs. stone-coated steel

What's the difference between standing seam and stone-coated steel?

Two systems cover most residential metal roofs. Standing-seam panels run from eave to ridge with concealed fasteners and raised interlocking seams. Stone-coated steel uses smaller pressed-steel panels finished with stone granules to look like shake, tile or shingles.

How does metal compare with asphalt on price?

In national cost surveys such as Cost vs. Value, the metal reroof costs substantially more than asphalt shingles for the same roof. Within metal, standing seam is usually the pricier option. Exact figures depend on the roof, so this page sticks to what moves the number.

What changes the price of a metal roof?

• Complexity: each valley, hip and penetration adds trim and labor
• Panel type and finish: gauge, aluminum vs. steel, paint system
• Existing roof: layers to remove and decking to repair
• Slope: low pitches may not suit some panel systems
• Access: long panels need room to stage and lift

How long does it last, and is it fire-rated?

Longevity is the case for metal: InterNACHI puts it at 40 to 80 years against 20 to 30 for asphalt shingles. On fire, the Safer from Wildfires program counts metal shingles or sheets among the roofs that qualify as Class A.

Does a metal roof in San Mateo County have to be a cool roof?

The Peninsula cities we checked are in climate zone 3, where a home reroof has no prescriptive cool-roof requirement. See the CEC compliance manual.

What matters locally?

On the Peninsula, coastal homes in Pacifica, Montara and Half Moon Bay deal with salt spray, so coating systems and warranty terms near salt water matter more than color. Bayside, from San Mateo to Redwood City, the bigger question is usually whether a metal roof suits the house style or an HOA's rules. Low-slope mid-century roofs may be below the minimum pitch a panel system allows. In wooded hill areas near Woodside and the Skyline corridor, a Class A metal assembly is part of the wildfire conversation.

What should be on a metal-roof bid?

Get the product line, metal and gauge, coating, underlayment, Class A assembly listing and both warranties named on every bid, so you're comparing the same roof. Our quote checker covers the rest. For your actual price, request a free written estimate: a licensed roofer measures the roof and prices your exact scope.

Related: what drives roof replacement cost, roof size estimator, Class A roofs.