Andersen Window Installation Across the Bay Area

Andersen's Fibrex composite is neither vinyl nor solid wood, and choosing between the 100 Series, 400 Series and A-Series, then deciding how to install it, shapes how your new windows look and last.

We install Andersen windowsFibrex compositeLarkspur, Marin County(415) 619-5167

Andersen is one of the most recognized premium window brands in the country, and its lineup spans a wide range of looks and budgets. Bay Area Siding Company installs Andersen windows throughout the Bay Area. We help you match the series to your house, pick the right installation method, and flash each opening so the window works with the wall around it.

Planning Andersen windows for your home? Request an estimate and we'll walk the openings with you.

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Andersen 100 Series vs. 400 Series vs. A-Series

Consideration	100 Series	400 Series	A-Series
Frame construction	Full Fibrex composite frame	Wood frame with protective exterior cladding	Architectural line built around design flexibility
Interior look	Clean, uniform composite finish	Warm wood interior you can stain or paint	Premium interior finish options suited to design-driven projects
Where it fits well	Mid-century tract homes, contemporary remodels, and projects where value and low maintenance lead	Traditional homes, craftsman and period styles where interior wood matters	Custom homes, architect-led remodels, unusual shapes and large openings
Maintenance	Low. No wood to refinish inside or out	Low outside. The interior wood needs periodic finish care like any wood trim	Low outside. Interior care depends on the finish selected
Honest trade-off	No real-wood interior, which some homeowners with period houses miss	Higher investment than the 100 Series, and interior wood is sensitive to prolonged condensation	The highest investment of the three, and more product than many straightforward replacements need

At a glance

Signature materialFibrex composite, Andersen's proprietary frame material

Frame optionsFull composite, clad-wood, and architectural lines

PositioningNational premium brand with strong recognition

Install methodsRetrofit (insert) or new-construction (full-frame)

WarrantyA strong manufacturer limited warranty. Terms vary by series and are reviewed with you.

Retrofit vs. Full-Frame Andersen Installation

A retrofit (insert) installation leaves the existing window frame in place. We remove the old sash and stops, confirm the frame is sound, square and properly sloped at the sill, then set the new Andersen unit inside it and seal it to the existing frame. The interior trim, exterior siding or stucco, and surrounding finishes stay undisturbed. The trade-off is a slightly smaller glass area, and the new window can only be as dependable as the old frame and the flashing that was already there. If the existing frame is soft or water has been getting behind it, an insert covers the problem up instead of fixing it.

A new-construction (full-frame) installation removes the entire old window down to the rough opening. That exposes the sheathing and the water-resistive barrier (WRB) around the opening, so we can see and correct damage before anything new goes in. It also allows the flashing to be done properly: a sloped or pan-flashed sill, jamb flashing lapped over the sill flashing, and head flashing tucked under the WRB above so water sheds outward, shingle-fashion, following Andersen's installation instructions. Full-frame costs more because the exterior finish and interior trim around each opening have to be opened and restored.

Which method fits depends on the wall. On many stucco homes, a well-executed retrofit is a sensible choice when the existing frames are in good shape, because cutting back and patching stucco adds cost and a visible repair. On sided homes, and especially when new siding is going on at the same time, full-frame is usually the better approach, because the wall is already open to the sheathing and WRB. One thing worth checking on any older home before committing to inserts is the sill. A common issue is decay at the bottom corners of old wood frames, which is often invisible until the sash comes out.

Andersen windows and Bay Area conditions

Near the coast, marine-layer moisture and salt air are hard on hardware and exterior finishes, so we discuss hardware choices and keep weep paths and sill drainage clear. Inland, sun and heat put more stress on exterior finishes and make glass selection more important for comfort. On parcels in a designated fire-hazard area on Cal Fire's maps, the California Building Code's Chapter 7A provisions apply to exterior windows and other specific openings, and Title 24 governs energy performance. We confirm current requirements with the local building department (the AHJ) at permit time. Older Bay Area framing that has shifted with seismic movement also tends to produce out-of-square openings, which we measure for rather than assume away.

What drives the cost of an Andersen project

The series you choose. The 100 Series, 400 Series and A-Series sit at different price levels.
Retrofit versus full-frame installation, and how much exterior and interior finish must be restored.
Wall type. Stucco cutback and patching differs from removing and reinstalling siding and trim.
Window size, operating style, custom shapes, and specialty configurations.
Glass requirements, such as tempered glazing where code requires it, energy-performance options, or fire-area provisions.
Repairs found once openings are exposed, such as damaged sheathing, a deteriorated WRB, or rotted framing members at the sill, plus access for upper-story windows and permit scope.

Our Andersen installation process

Consultation and measurement. We review each opening, the wall type and the style of the house, then recommend a series and an installation method with a clear written scope.
Ordering to verified dimensions. Openings are measured for square and level so the Andersen units are sized to fit the real conditions.
Removal. For retrofit we remove the sash and stops. For full-frame we remove the old unit to the rough opening, exposing the sheathing and WRB.
Inspection and corrections. We check the sill, sheathing, WRB and existing flashing, and review any repairs with you before proceeding.
Flashing and WRB integration. Sill pan or sloped sill flashing, jamb flashing, and head flashing are lapped into the WRB so water drains out, not in.
Installation to Andersen spec. Each unit is set, shimmed, fastened, insulated and sealed per Andersen's installation instructions, then checked for smooth operation.
Finish and walkthrough. Trim, siding or stucco are restored, and we walk each window with you, including operation and care.

Why homeowners choose Bay Area Siding Company for Andersen windows

We treat a window as part of the wall assembly, not a standalone product, and we tell you plainly when a less expensive series or method will do the job.

Assembly-first approach

Because we work on siding and windows together, we flash openings to integrate with the WRB instead of relying on sealant alone.

Honest series guidance

If the 100 Series suits your house, we'll say so, and we'll explain when the 400 Series or A-Series is worth the step up.

Marin-based, Bay Area-wide

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

Other services we offer

Comparing brands or planning a larger project? These pages may help.

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Andersen Windows FAQ

How does Fibrex compare with vinyl and wood?

Fibrex is Andersen's own composite, a different material from standard vinyl or solid wood. Vinyl is a good fit for budget-conscious projects where low maintenance and lower upfront cost matter. Wood offers a traditional look and can be refinished, but it needs more upkeep. Fibrex sits between them as a low-maintenance premium option. We'll walk through all three honestly for your house.

Can Andersen windows be installed without disturbing my stucco?

Often, yes. A retrofit (insert) installation leaves the existing frame and stucco in place. It works well when the old frames are sound. If we find decay or signs of water intrusion, we'll recommend full-frame for those openings so the flashing can be corrected.

My home is in a fire-hazard zone in the East Bay hills. Does that change my window choice?

It can. In designated fire-hazard areas, Chapter 7A of the California Building Code includes provisions for exterior windows. We check your parcel against Cal Fire's maps and confirm current requirements, including glazing, with the local building department at permit time.

Should I replace windows at the same time as my siding?

When both are due, doing them together is usually more efficient. With the siding off, the sheathing and WRB are exposed, which makes full-frame installation and proper flashing integration simpler. It also avoids opening the wall twice.

Ready to choose the right Andersen series and installation method for your home? Schedule a consultation today.

Call (415) 619-5167

Bay Area Andersen Windows

Request Bay Area Andersen Windows Consultation

Andersen Window Installation Across the Bay Area

Andersen 100 Series vs. 400 Series vs. A-Series

Retrofit vs. Full-Frame Andersen Installation

Andersen windows and Bay Area conditions

What drives the cost of an Andersen project

Our Andersen installation process

Why homeowners choose Bay Area Siding Company for Andersen windows

Other services we offer

Andersen Windows FAQ

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