Siding Replacement Across the Bay Area

Before you choose a color or a brand, decide what the job actually is: a spot repair, a cover-over, or a full tear-off that lets you see and fix what's behind the old siding.

Siding replacement & tear-offAll major materialsLarkspur, Marin County(415) 619-5167

Bay Area Siding Company replaces siding on homes throughout the SF Bay Area, from foggy coastal neighborhoods to hot inland valleys. This page covers the decisions that shape your project's scope and cost, so you can compare estimates on equal terms.

Want a straight assessment of whether your siding needs repair or replacement? Request an estimate.

Call (415) 619-5167

Repair, cover over, or tear off?

When is a repair enough?

If the damage is limited to a few boards, such as a sprinkler-soaked corner or rot under a leaking hose bib, and the surrounding siding is sound, a targeted repair can be the right call. The replacement boards need to match the profile and exposure of the old ones, and the repair should include the WRB and flashing behind that section, not just the face boards.

What about installing new siding over the old?

A cover-over is faster and produces less debris, and it's sometimes sold as the economical route. The trade-off is that it hides problems. Any soft sheathing, failed building paper, or missing flashing stays in the wall. It also adds wall thickness, which means window and door trim, sills, and penetrations have to be built out to suit.

When does a full tear-off make sense?

Choose a tear-off when the siding is at the end of its life, when you see recurring moisture stains, soft spots, or peeling paint that won't hold, or when you want the wall detailed properly for decades to come. Removing the cladding is the only way to inspect and correct the layers that actually keep water out.

Can I do one elevation at a time?

Yes. Replacing the worst-exposed side first, often the one facing prevailing weather, is a legitimate way to phase a project. The key is detailing the transition so the new WRB laps correctly with what remains, and choosing a material you can match later.

What a tear-off actually exposes

When the old siding comes off, you're looking at the sheathing (or substrate) and the water-resistive barrier over it, along with the flashing at windows, doors, roof-wall intersections, and horizontal transitions. Those layers determine whether a wall stays dry. The siding itself is mainly the first line of defense and the finished look.

A common finding on older Bay Area homes is building paper that has become brittle or torn, window openings that were never flashed with a sill pan, and missing kick-out flashing where a roof edge dies into a wall, which is a classic spot for hidden rot. On many 1950s–60s tract homes, the original paper has deteriorated around penetrations such as dryer vents and electrical boxes. Once the wall is open, each of these can be repaired: damaged sheathing replaced, new WRB installed shingle-fashion so upper layers lap over lower ones, and flashing integrated so water is directed out rather than behind.

One important exception is panel siding such as T1-11 or grooved plywood, found on many Eichlers and mid-century homes. On these homes, the panel can serve as both the siding and the sheathing. Replacing it is a sheathing job, and on walls that resist seismic loads, the new panels and nailing need to meet the structural requirements. We identify this during the estimate so it's in the scope from day one, not discovered mid-project.

Your main siding material options

Material	Genuine strengths	Honest trade-offs	Often a good fit for
Fiber cement (e.g., James Hardie)	Noncombustible cladding, dimensionally stable, resists rot and insects; factory ColorPlus finishes are available, with transferable limited warranties on substrate and finish.	Heavy and dusty to cut, and it needs careful joint and clearance detailing per manufacturer spec. Field-painted boards need repainting over time.	Homeowners who want durability and low maintenance, and fire-hazard parcels (always confirm the assembly with the AHJ).
Engineered wood (LP SmartSide)	Lighter weight, a convincing real-wood grain, good impact resistance, and easy to work and trim, which suits complex walls.	Wood-based, so it relies on sealed cut edges, proper clearances, and maintained paint to manage moisture.	Craftsman and rustic looks, detailed trim work, and homes where weight or handling matters.
Vinyl	Lower upfront cost, never needs painting, and wide color and profile choices; installs quickly.	Expands and contracts noticeably, so it must be hung loose on slotted fasteners. Dark colors in strong sun and dent resistance need consideration. It may not suit parcels where Chapter 7A applies.	Budget-conscious projects where low maintenance and lower upfront cost matter.
Wood (cedar, redwood)	Authentic character, easy to repair board by board, and the historically correct choice for many Victorians and Craftsman homes.	Needs regular painting or staining. Performance depends on grade and upkeep, and it is combustible.	Historic homes, design-driven projects, and owners comfortable with ongoing maintenance.

What drives the cost of a re-side

Wall area and complexity: stories, gables, bays, dormers, and how much scaffolding or access work the site needs.
Material and trim package: the cladding line, profile, factory finish versus field paint, and the amount of corner, window, and fascia trim.
What the tear-off reveals: the extent of sheathing replacement, WRB, and flashing corrections, which can't be fully known until the wall is open.
Window and door integration: whether existing units get new flashing and trim, or whether you replace windows while the walls are open.
Older-home requirements: lead-safe work practices on pre-1978 homes and proper disposal of removed materials.
Permits and fire-zone requirements: ignition-resistant assemblies or vent upgrades where the jurisdiction requires them.

Re-siding for Bay Area conditions

Near the coast, the marine layer keeps walls damp for long stretches, and salt air is hard on fasteners and metal flashing. Corrosion-resistant fasteners and a rainscreen gap that lets the wall dry are worth discussing on those homes. Inland, strong UV and summer heat test paint films and vinyl color stability. Many hillside parcels fall within Cal Fire–mapped fire hazard severity zones, where California Building Code Chapter 7A governs specific components such as exterior wall coverings, vents, and windows. We confirm current requirements with your local building department at permit time.

Our installation process

Consultation and estimate. We walk every elevation, probe suspect areas, note the siding type and housing era, and give you a written scope that separates known work from conditional items.
Permits and prep. We pull required permits with the AHJ and protect landscaping, windows, and hardscape before removal starts.
Tear-off. Old cladding is removed down to the sheathing and hauled away, using lead-safe practices where the home's age calls for them.
Inspect sheathing, WRB, and flashing. We check the substrate for soft or delaminated areas and review how windows, doors, and roof-wall intersections were flashed.
Corrections. Damaged sheathing is replaced, and you see what we found and approve the repairs before we close anything up.
New WRB and flashing. The barrier is installed shingle-lapped, with sill pans, head flashing lapped under the WRB above, kick-outs at roof lines, and furring for a rainscreen where specified.
Installation and walkthrough. Siding and trim go on to the manufacturer's installation instructions for fastening, clearances, and joint treatment, followed by a final walkthrough with you.

Why homeowners choose Bay Area Siding Company

We treat a re-side as a wall-assembly project, not just a cladding swap, and we tell you plainly when a smaller job will do.

Assembly-first approach

Every tear-off includes inspection and correction of the sheathing, WRB, and flashing before new siding goes up.

Installed to manufacturer spec

We follow each product's published installation instructions, which also protects your eligibility for manufacturer warranty coverage.

Clear scope, local contact

We're Marin-based in Larkspur and serve the Bay Area, with written scopes and a direct line at (415) 619-5167.

How to vet any siding contractor

Verify the contractor's license status at cslb.ca.gov, and confirm liability and workers' comp coverage.
Ask whether the bid includes tear-off, new WRB, and flashing, or only new cladding.
Look for a written plan for handling damaged sheathing, including how it will be documented and priced.
Confirm who pulls the permit and whether Chapter 7A requirements apply to your parcel.
Ask which manufacturer installation instructions they follow, and how they handle clearances and joints.
Be wary of pressure to sign the same day or a bid that skips a close look at your walls.

Other services we offer

Go deeper on a specific material, or pair your re-side with new windows.

James Hardie siding Fiber cement siding Vinyl siding Window replacement

Siding Replacement FAQ

Do I need a permit to replace siding in the Bay Area?

Requirements vary by city and county, and a full re-side commonly requires one, especially if sheathing is replaced or the parcel is in a fire hazard severity zone. We confirm with the local building department before work begins.

Should I replace windows at the same time?

It's often an efficient time to do it. With the walls open, new full-frame (new-construction) windows can be flashed directly into the new WRB. If your windows are in good shape, we can re-flash and re-trim them instead. Retrofit (insert) windows remain an option later.

Is a cover-over ever the right choice?

It can be, when the existing wall is verifiably dry and sound and the budget or schedule is tight. The limitation is that you can't confirm the condition of the sheathing and flashing without opening the wall. We'll tell you honestly if we think the risk is worth taking.

What changes for homes near the coast or in fire zones?

Coastal homes benefit from corrosion-resistant fasteners and flashing and, often, a rainscreen gap. In Cal Fire–mapped hazard zones, Chapter 7A can dictate wall covering, vent, and window requirements. We confirm the specifics with the AHJ during permitting.

Ready to find out what's behind your siding and what it will take to do the job right? Schedule a consultation.

Call (415) 619-5167