St. Helena Wood Siding

In St. Helena, many homeowners asking about wood siding already live with it. They own a Victorian-era cottage near downtown, a farmhouse clad in painted lap boards, or a board-and-batten barn-style house out among the vines. They want to keep that character. Bay Area Siding Company is a Marin-based siding and window contractor that installs and replaces natural wood siding across the Napa Valley. We treat wood as a deliberate choice with real rewards and real obligations, not as a default.

Thinking about wood for your home? Request a bid or call (415) 619-5167 to set up a walkthrough.

Why people here still choose real wood

Wood siding does something the alternatives only imitate. Real cedar or redwood carries its own grain and takes paint or stain with depth. It also ages in a way that suits an older house. On an elevation near St. Helena's National Register historic district, or on a farmhouse whose original boards set the look of the whole property, a like-for-like wood replacement is often the most faithful option. It can also be the easiest one to explain during design review.

Wood has practical merits beyond appearance:

• It's repairable. A damaged board can be cut out and replaced, and a new board can be milled to match an old profile. That matters on period homes where stock profiles don't line up with what's on the wall.
• It's renewable. Wood is a natural, renewable material, which is a priority for some owners.
• It's flexible in form. Bevel or clapboard lap, shiplap, board-and-batten, and cedar shingle or shake all come from the same material family. You can match a specific historic pattern or choose a clean vertical look for a contemporary vineyard house.

The honest trade-offs

We'd rather you choose wood knowing what it asks of you.

Upkeep is the biggest one. Wood siding needs its finish maintained, whether paint, solid stain, or semi-transparent stain. Upvalley summers are hot and sunny, and strong sun and UV exposure break down exterior finishes over time. South- and west-facing walls usually show wear first. When the finish lapses, the wood is open to moisture, which leads to checking, cupping, and eventually rot. Wood-boring insects are another risk to watch for. Owners who repaint or restain on schedule get long service from wood. Owners who don't usually end up paying for replacement boards.

Combustibility is the second. Wood burns, and in this valley that point isn't theoretical. The 2020 Glass Fire burned into the St. Helena area. Cal Fire's 2025 Local Responsibility Area maps newly designated parts of the upvalley as elevated fire hazard, including sections between St. Helena and Calistoga. That doesn't rule out wood everywhere in town, but on some parcels it changes the conversation considerably. The next section covers this.

Wood on a fire-designated parcel

Where a parcel falls within a designated Fire Hazard Severity Zone or wildland-urban interface area, California's Chapter 7A provisions govern certain exterior assemblies. Exterior wall coverings are one of them. Those rules call for wall coverings that are noncombustible, ignition-resistant, or part of an assembly that meets specified fire tests. Untreated wood siding generally doesn't qualify on its own. Some exterior-rated fire-retardant-treated wood products, or tested wall assemblies, may be acceptable.

Whether Chapter 7A applies to your project depends on two things:

• The parcel's designation.
• The scope of work. A new home, an addition, or a full re-side is treated differently from a small repair.

We confirm the specifics with the City of St. Helena Building Division before specifying any material.

If wood isn't a good fit for your parcel, there are other routes to the look you want. Fiber cement is noncombustible and comes in lap, shingle, and panel profiles that read convincingly as wood once painted. The St. Helena James Hardie page covers that brand's options and the fire-zone reasoning in more depth. LP SmartSide engineered wood gives a wood texture with less upkeep than solid boards. Its fire-code standing on a designated parcel is something we'd check product by product, not assume. Some owners combine materials: wood where it's allowed and most visible, fiber cement on the exposures that need it. We can walk you through that too.

Getting a wood installation right

Wood is less forgiving of shortcuts than most claddings. Most of how long it lasts is decided before the first board goes up.

Replacing existing siding starts with removing the old cladding. That exposes the sheathing or substrate, the water-resistive barrier (WRB), and the flashing, not the studs. This is our chance to find hidden rot at the base of walls and around windows. We also confirm there's a working weather barrier, which older St. Helena walls sometimes lack, and re-detail the flashing at openings, corners, and roof-to-wall transitions. Framing only gets opened if the sheathing itself has failed. That's a larger scope, and we'd show it to you and price it separately.

On the wood itself, we pay close attention to four things:

• Finish. Priming or finishing all faces and cut ends so the boards take on and release moisture evenly.
• Clearance. Keeping the siding off grade and away from roof surfaces.
• Fasteners. Using corrosion-resistant fasteners suited to the species so they don't stain or loosen.
• Drainage. Detailing the wall so water that gets behind the cladding can drain out.

Where it suits the assembly, a drainage gap behind the siding helps the wall dry. We decide that per house and don't apply it by default.

A typical project follows this sequence:

1. Consultation and species and profile selection.
2. A measured scope.
3. Permitting through the City of St. Helena Building Division, plus any design review tied to the address.
4. Tear-off and substrate inspection.
5. WRB and flashing.
6. Installation.
7. Finish.
8. A final walkthrough, where we also go over a maintenance plan for your specific exposures.

Matching an older St. Helena home

Much of the wood work downtown is about continuity. We might replace failed sections of a Victorian cottage without the repair showing, match an early-20th-century lap reveal, or reproduce a shingle pattern on a gable. Profiles can often be sourced or milled to match. When the goal is a seamless repair rather than a full re-side, we'll tell you if the sound original siding is worth keeping. For homes near the historic district, we confirm any design considerations tied to the address before ordering material.

If you're weighing a complete tear-off against selective repair, or wood against other claddings, the St. Helena siding replacement page covers that broader decision. The wood siding hub goes deeper on species and profiles.

What drives the cost of wood siding

We don't publish prices, because a wood project in St. Helena depends on details we have to see on site:

• Species and grade. Clear, knot-free cedar or redwood costs more than knotty or lower grades.
• Profile. Shingles and custom-milled historic profiles take more labor than standard lap.
• Size and access. The size and height of the house, and access on larger or sloped vineyard lots.
• Hidden repairs. How much substrate repair turns up at tear-off.
• Finish. The finish system, and whether it's applied before or after installation.
• Parcel requirements. Any fire-zone or historic-district requirements, including the cost difference of treated wood or a tested assembly where one is required.

Over the long term, plan for periodic refinishing as part of the true cost of owning wood.

To see finished exteriors, browse our projects gallery. For more on the areas we cover, see our Wine Country service area.

FAQ

Can I use wood siding if my St. Helena property is in a fire hazard zone? Possibly, but not without checking. On a designated parcel, Chapter 7A generally requires exterior wall coverings that are noncombustible, ignition-resistant, or part of a tested assembly. Untreated wood usually doesn't meet that on its own, though some fire-retardant-treated products or tested assemblies may. It depends on your parcel and scope, and we confirm it with the City of St. Helena Building Division before specifying.

Cedar or redwood — which is better? Both are naturally durable species with a long history on West Coast homes. The choice usually comes down to the look, the profile you're matching, grade availability, and budget. We'll show you samples in both.

How often will wood siding need refinishing? It depends on the finish you choose and the exposure. Sun-facing walls usually need attention first. We'll give you a maintenance plan for your house rather than a single number.

Do I need a permit to replace wood siding in St. Helena? Exterior re-siding is permitted work through the City of St. Helena Building Division. Homes near the historic district may also have design considerations. We handle the permitting.

Ready to talk about wood for your home? Call (415) 619-5167 or request a bid, and we'll come out, look at the walls, and give you a straight answer on whether wood is the right fit.