Morgan Hill Siding & Windows Replacement

Morgan Hill sits in the warm, dry southern end of the valley, and that shows up on a home's walls. Long, clear summers put a real UV and heat load on exterior finishes, while the swing to wet winters and cool nights works joints and fasteners season after season. Bay Area Siding Company is a Larkspur-based siding and window contractor working South County, and full siding replacement is one of the things we do most: pulling the old cladding, checking what's behind it, and rebuilding the wall so it sheds water and holds its color for years, not seasons.

Want a plan for your walls? Request an estimate or call (415) 619-5167 and we'll walk the exterior with you.

When a re-side beats one more repair

Patching buys time; it doesn't fix a wall that's reached the end of its service life. On Morgan Hill homes we usually point toward replacement when we see a cluster of these, not just one:

• Finish that chalks, fades unevenly, or peels within a year or two of a repaint — often the sun-facing south and west elevations first
• Boards that cup, split at the ends, or feel spongy where trapped moisture has gotten in
• Caulk lines that keep opening at butt joints and around trim as the material expands and contracts
• Aging T1-11, hardboard, or early vinyl that's brittle, faded, or no longer sealing
• Interior clues — staining, a musty edge, or paint lifting on the inside of an exterior wall

One failing spot can be repaired. A pattern across several walls is the wall telling you the system, not the surface, is done.

What actually comes off — and what we look at underneath

A straight re-side is not a demolition. We remove the existing cladding down to the sheathing and substrate; the framing stays put unless we find damage that calls for opening it up further. With the old siding off, the parts that decide whether a wall lasts are finally visible:

• The sheathing / substrate — checked for soft spots, past water intrusion, and any concealed rot, usually around windows, at wall bottoms, and behind gutters
• The water-resistive barrier (WRB) — many older exteriors here have a tired barrier, a patchwork one, or none worth keeping; we replace it as a continuous drainage layer
• Flashing — head flashing, kickouts, and the laps at windows, doors, and transitions, which is where leaks usually start

Covering new siding over failing material skips this entirely and can seal moisture in. Taking it off is the only way to hand back a wall that's sound underneath, not just newer on the outside.

Choosing a material for a hot-summer valley

Morgan Hill's mix of housing — newer subdivisions like the Coyote Estates area, established hillside tracts such as Jackson Oaks and Holiday Lake Estates, downtown's smaller-lot homes, and semi-rural parcels out toward Paradise Valley — means there's no single right answer. What the local climate rewards is a cladding and finish that hold up to sun and heat with minimal upkeep. We install and can compare:

• James Hardie fiber cement — dimensionally stable and available with a baked-on finish that resists fade; see the Morgan Hill James Hardie page for the detail
• Fiber cement more broadly, across manufacturers
• LP SmartSide — engineered wood with a warm, wood-grain look
• Vinyl — lower cost and low maintenance where the profile and exposure suit it

We also work in CertainTeed, wood, and aluminum. Factory-applied finishes generally keep their color longer than field paint under this much summer sun, which is worth weighing when you compare quotes.

Rural and hillside parcels: a fire-edge note

Parts of Morgan Hill run up against open hills and wildland — the eastside slopes above East Dunne Avenue, the ground below El Toro on the west, and the semi-rural edges. Cal Fire's updated 2025 Fire Hazard Severity Zone maps, which the city adopted by ordinance, redrew these lines: hazard eased across much of western Morgan Hill and increased toward the eastern foothills, and the city added High zones alongside its Very High ones. Where a parcel carries a fire-hazard designation, California Building Code Chapter 7A can govern the exterior wall covering, generally steering toward noncombustible or tested ignition-resistant assemblies. Whether it applies to your project depends on your specific address, the product, and the scope — so if you're on a hillside or rural lot, tell us early and we confirm the designation with the City rather than guessing. On flatland interior lots it typically isn't a factor.

Permits, timeline, and what moves the price

Re-siding is an alteration to your home, and the City of Morgan Hill's Building & Fire Prevention Division requires a permit for that kind of exterior work; we handle the submittal. What we can't quote sight-unseen is the price, because the honest cost drivers are all things a walkthrough reveals: the home's size and number of stories, how much substrate or flashing repair turns up once the cladding is off, the material and finish you choose, access on hillside or view lots, and any fire-zone assembly detailing on a designated parcel. We measure, write a scope, and give you a realistic timeline before anything comes off.

FAQ

Do I need a permit to replace siding in Morgan Hill? Yes. The City of Morgan Hill requires a building permit for alterations and repairs to an existing structure, which a full re-side is. We prepare and carry the permit as part of the job.

My house backs up to the hills — does that limit my siding choices? It can. If your parcel falls in a High or Very High Fire Hazard Severity Zone, Chapter 7A may require a noncombustible or ignition-resistant wall assembly. The 2025 maps changed several boundaries, so we confirm your address's current designation with the City before speccing rather than assuming.

Will new siding really hold its color better in our summers? A factory-baked finish generally resists fade and chalking longer than field-applied paint under Morgan Hill's long, clear, high-UV summers. Material and color choice both matter, and we can show you options built for this exposure.

Can you re-side and replace windows at the same time? Yes, and it's often the smart sequence, because the flashing between the window and the new WRB has to be integrated correctly. See Morgan Hill window replacement for that side of the work.

Get your Morgan Hill re-side moving

We're based in Larkspur and work throughout South County and the wider South Bay. Browse finished work in our project gallery, then call (415) 619-5167 or request an estimate. We'll look at your walls, talk through materials for the climate, and lay out the process.