Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
James Hardie Roofing: The San Francisco Owner’s Guide
We stock and install James Hardie-compatible roofing and siding parts across San Francisco, with most roof repair jobs landing between $470 and $2,125 installed. A full James Hardie roofing or siding replacement runs $9,440 to $23,600 depending on square footage and substrate condition. Most San Francisco owners discover a failed James Hardie part the same way: a water stain on the ceiling after a winter storm, a piece of siding that cracked loose during wind, or a roof section that started cupping after years of fog-driven moisture. The part itself is almost never the whole story – what you’re seeing is usually the visible end of a moisture or fastener problem that’s been moving for months.
Key takeaways:
- James Hardie parts are matched by profile, thickness, and exposure – not just color
- Installed repair pricing in San Francisco runs $470 to $2,125; full replacement $9,440 to $23,600
- Every Bradford job gets a written price before work starts, and a one-year written guarantee
- Call (831) 610-5598 – a live person answers, day or night
Which James Hardie Models This Applies To
Most of what we replace in San Francisco falls into three James Hardie product families: HardiePlank lap siding, HardiePanel vertical siding, and HardieShingle siding. Each uses a different profile and thickness spec, and none interchange cleanly. HardiePlank is the 5/16-inch thick lap profile with a wood-grain texture, available in 4-inch, 5-inch, and 7-inch exposures. HardiePanel comes in 4×8 and 4×10 sheets with either a smooth or stucco finish. HardieShingle runs in straight-edge, staggered-edge, and half-round profiles, typically 24 inches long.
The compatibility gotcha most owners run into: the product name printed on the back of the board tells you the series, but the exposure is what determines whether a replacement board will lay correctly against its neighbors. A HardiePlank board installed at 5-inch exposure cannot be swapped for a 4-inch exposure board without visible seam misalignment. Before we order anything, we measure the installed exposure and match it. For OEM versus aftermarket: James Hardie’s fiber cement boards are the only product that carries the full James Hardie material warranty, so for visible exterior work we install genuine James Hardie. For trim, flashing, and underlayment, we use code-listed equivalents from suppliers we’ve verified – the spec is what matters, not the logo.
One more thing worth knowing in San Francisco: buildings over three stories in the city fall under stricter exterior cladding requirements, and some older multi-unit structures in neighborhoods like the Richmond and Sunset are subject to facade inspection programs. If your building is in one of those programs, we’ll pull the permit and coordinate the inspection as part of the scope.
Styles & brands we work with
Signs Your James Hardie Roofing Is Failing
- Cupping or warping at board edges. This almost always traces back to water wicking behind the board, usually from a failed or missing piece of flashing above it. The board is absorbing moisture, and fiber cement loses its dimensional stability once saturated over months of San Francisco fog cycles.
- Efflorescence, or white chalky residue, on the surface. Mineral salts are being pushed out of the board by sustained moisture. It’s not just cosmetic – it means the board is holding water and breaking down internally.
- Cracking around fasteners. James Hardie boards are brittle at the edges. When a board swells and shrinks repeatedly, fasteners driven too close to the edge will eventually crack out. Once that crack opens, water has a direct path behind the siding.
- Gaps at butt joints. James Hardie specifies a small, caulked gap at butt joints. When the caulking fails and the gap widens, driven rain gets behind the boards. In the Outer Sunset, where wind-driven rain comes in hard off the ocean, this is one failure we see every winter.
- Staining or softness below a roofline. Roof-to-wall transitions are the most common leak source on any San Francisco home with Hardie siding. If the step flashing wasn’t lapped correctly, water runs behind the siding and follows the framing downhill. By the time the stain shows inside, the sheathing has usually been wet for a while.
Replacement Cost & What’s Included
Here’s how James Hardie roofing and siding work prices out in San Francisco right now:
| Scope | Installed Price Range |
|---|---|
| Roof repair (flashing, underlayment, isolated board replacement) | $470 – $2,125 |
| Tile roof repair | $710 – $2,950 |
| Roof replacement (full) | $9,440 – $23,600 |
| Metal roof installation | $17,700 – $47,200 |
Every number above is parts and labor, installed. We write the scope and the price before any work starts, and that’s the number on the invoice – no change orders, no “we found additional damage” re-price at the door. If we find something behind the wall that changes the job, we stop, show you a photo, and put the adjusted number in writing before we proceed.
What drives the range: roof pitch and access (a three-story Outer Richmond building with zero staging room costs more than a single-story Inner Sunset bungalow), the condition of the substrate, and whether the existing flashing and underlayment can be salvaged or need full replacement. We itemize all of it so you see exactly where the labor and material dollars go.
Every completed job carries the 365-Day Done Right Promise: if the repair fails within one year, Bradford Remodeling Co San Francisco returns and corrects the work at no charge. You’ll have that guarantee in writing, signed, at close-out, along with a documented scope of what we installed and where.
See the difference
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After
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AfterDIY or Call Us?
There’s a real safety line here, and we don’t blur it. Working on a roof in San Francisco means steep pitches, wet mornings, and often a two- or three-story drop. We don’t recommend any homeowner get on a roof to repair flashing or replace boards – a fall from even a single story is a life-changing injury. The safe things you can do from the ground: note exactly where the stain is on the ceiling, take dated photos of the visible damage, and check whether any boards are loose enough to see what’s behind them. That’s it. Don’t pull boards off. Don’t run a hose on the roof to “find the leak” – you’ll make it worse and you won’t learn anything useful.
If the part is a piece of Hardie siding on a ground-floor wall, some homeowners successfully replace a single board. It’s still fiber cement, it’s still brittle, and the cutting throws silica dust – which means a respirator, not just a dust mask. Most call us at this point. We don’t blame you. Call (831) 610-5598 and we’ll send someone who’s done this a thousand times in San Francisco’s specific climate. As Curtis Lane puts it: straight number, real scope, no surprises at close-out.
FAQs
James Hardie fiber cement generally carries a 30-year limited, non-prorated transferable warranty, but real lifespan in San Francisco depends heavily on exposure. We see well-installed Hardie siding lasting 25 to 40 years here. The wildcard is fog-driven moisture and salt air in the western neighborhoods – the Outer Sunset, Outer Richmond, and anything within a few blocks of Ocean Beach sees accelerated fastener corrosion and flashing degradation. A home three blocks from the beach will usually need flashing replacement before the siding itself fails. Call (831) 610-5598 if you want us to look at what you’re seeing – estimates are free.
Small hairline cracks can sometimes be stabilized with an exterior-grade elastomeric sealant as a temporary measure, but any crack wider than a dime, any board that has cupped or warped, or any board with fastener cracks should be replaced. Fiber cement doesn’t have the flexibility to hold a patch repair the way wood does. In San Francisco’s wet-winter climate, a patched board that holds water will fail again within a year or two. Call (831) 610-5598 for an honest read on whether the board you’re looking at is salvageable.
A typical single-board replacement or flashing repair takes one day on site. That includes removing the damaged material, inspecting and addressing the substrate, installing the new board with matched exposure and proper fasteners, and sealing all joints. A larger roof-to-wall flashing job on a two-story building might run two days. We give you a written schedule before we start, and we hit it. Call (831) 610-5598 and we’ll walk through your specific scope.
Our trucks carry the most common James Hardie profiles in neutral colors, plus flashing, housewrap, sealants, and fasteners matched to James Hardie specs. If your board is a custom-ordered color or a less common profile like staggered-edge shingle, we order it direct from our supplier – usually a 3 to 5 business day turnaround in San Francisco. We’ll give you the lead time in writing before we start so there’s no surprise gap between estimate day and install day. Call (831) 610-5598 to check stock on your specific profile.
Get a Written Price for Your James Hardie Repair
You don’t need to guess at the cost or wait through a callback queue. Call (831) 610-5598 and a live person answers – 24 hours a day, 7 days a week. Tell us what you’re seeing. We’ll schedule a look, write the scope, and hand you a firm number before any work starts. Bradford Remodeling Co San Francisco also handles other premium brands including KraftMaid, Cambria, and Silestone if your project extends beyond the exterior. Every job runs under The Garrison Standard and carries the 365-Day Done Right Promise, in writing, at close-out.
Written by Curtis Lane, Owner, Bradford Remodeling Co – San Francisco, CA at Bradford Remodeling Co San Francisco, serving San Francisco and nearby areas.
