Kentfield Andersen Windows

Andersen is a name most homeowners already know, and for a certain kind of Kentfield project it earns the recognition. This is a premium national brand whose signature material — Fibrex, a composite of wood fiber and polymer — was built to give the strength and low maintenance of a synthetic frame with something closer to the substance and slim sightlines of wood. On the custom and architect-designed homes that fill the wooded slopes above the Ross Valley, that combination is often exactly what an owner is after.

Bay Area Siding Company installs Andersen across Marin from Larkspur, minutes from Kentfield. This page covers the Andersen lines and where they fit here. To compare Andersen against the other brands, start at the Kentfield window replacement overview.

Weighing Andersen? Call (415) 619-5167 or request an estimate.

What sets Andersen apart

The Fibrex story is the real one. It's more rigid and stable than vinyl, which lets Andersen build a stronger frame with narrower profiles and more glass — and it doesn't rot, swell, or need repainting, which matters in a valley where wood windows are a maintenance liability. That makes Andersen a genuine option for owners who want the look and feel of a high-end wood-frame window without signing up for the upkeep that Kentfield's damp, shaded climate demands.

Andersen also brings deep design flexibility — sizes, shapes, colors, and hardware — and strong brand recognition, which some owners value for resale.

The Andersen lines

• 400 Series — the mainstream premium line, wood interior with a low-maintenance exterior; the volume choice for many custom homes.
• A-Series — the top architectural line, with the broadest range of styles, finishes, and sizes, built to match specific architectural looks.
• 100 Series — full-Fibrex frames, a more accessible entry into the Andersen family that keeps the material's durability.

Which line fits depends on your architecture, your budget, and how closely the windows need to match a specific design. On the period and custom homes toward Kent Woodlands, the 400 and A-Series are where most of these conversations land; the 100 Series suits owners who want Andersen's material at a lower tier.

Where Andersen fits in Kentfield — honestly

Andersen sits at the premium end, and it shines on the homes that justify it: custom houses, period homes with detailing worth matching, and owners who want a specific architectural window and low maintenance both. On the postwar cottages on the valley floor, where budget leads, a well-built vinyl or fiberglass window from Milgard or Anlin may deliver the comfort you need for less. And where an owner specifically wants true all-wood or fiberglass premium construction, it's worth also comparing Marvin and Pella. We'll give you the straight comparison rather than steer you to the priciest option by default.

Energy, damp winters, and the fire question

Every Andersen goes in with an insulated dual-pane, Low-E glass package as the baseline against Kentfield's long, gray, damp winters — the upgrade from old single-pane wood units is felt right away in warmth and in far less interior condensation. California's Title 24 code sets the performance targets a replacement window must meet; those depend on climate zone and code cycle, so we confirm the current numbers at permit time rather than quoting fixed figures.

On the wooded slopes, glazing can fall under fire code. Where a Kent Woodlands parcel is under a fire-hazard designation — and Cal Fire's updated Fire Hazard Severity Zone maps are moving through local review and adoption in Marin — Chapter 7A can require multi-pane glazing with a tempered pane when an opening is altered. Andersen can be specified to meet those requirements; whether they apply depends on your parcel and whether the work is a repair or an alteration, which we confirm with Marin County before ordering. If your home is inside the Kent Woodlands association, its design review may also weigh in on window appearance — tell us early.

Install and permitting

We do both retrofit (insert) and new-construction (full-frame) installs. On the older, frequently-wet homes where Andersen often goes, a new-construction install is frequently the right call: it strips the opening to the framing so the flashing can be fully renewed where rot or water intrusion has set in. Either way we flash and air-seal for the valley's high rainfall. Kentfield is unincorporated, so permitting runs through the Marin County Community Development Agency, Building and Safety Division at the San Rafael Civic Center, with a Title 24 form as part of the submittal. We handle it.

What affects the cost

We quote after measuring, not online. Drivers: the number and size of openings, the Andersen line (A-Series runs above the 400, which runs above the 100), the glass package, retrofit vs. new-construction, whether fire-zone tempered or multi-pane glazing is required on a hillside lot, the condition of the framing behind each window, and access on upper stories and steep, wooded lots.

Frequently asked questions

What is Fibrex, and why does it matter in Kentfield? Fibrex is Andersen's wood-and-polymer composite. It's stronger and more stable than vinyl, allows slim wood-like sightlines, and doesn't rot or need repainting — a real advantage in a damp valley where wood windows are a maintenance burden.

Is Andersen worth the premium over vinyl? On custom and period homes where sightlines, design match, and low maintenance all matter, often yes. On budget-led valley-floor cottages, a quality vinyl or fiberglass window may deliver the comfort you need for less. We'll give you the honest comparison.

Can Andersen meet fire-zone glazing rules in Kent Woodlands? Yes — it can be specified with tempered and multi-pane glazing where Chapter 7A applies. Whether it applies depends on your parcel and whether the work is an alteration, which we confirm with Marin County before ordering.

Which Andersen line should I look at? Most custom-home projects here land on the 400 or A-Series; the 100 Series is the more accessible full-Fibrex option. It depends on your architecture, budget, and how closely the windows need to match a specific look.

Get an Andersen windows estimate in Kentfield

Call (415) 619-5167 or request an estimate. We'll match an Andersen line to your home, compare it honestly with the other brands, confirm any fire-zone glazing or association review, and handle the County paperwork. See our project gallery and the Marin service area.