The Andersen 100 Series and 400 Series are the two most commonly specified Andersen windows for residential replacement projects. Both are genuine Andersen products with full Andersen warranty coverage. Both are installed by Andersen Certified contractors. But they’re made from different materials, perform differently in certain applications, and cost differently — and the right choice depends on your home, your priorities, and your budget.
Here’s a complete comparison to help you decide.
The fundamental difference between the 100 Series and 400 Series is the frame material.
The Andersen 100 Series uses Fibrex — Andersen’s proprietary composite material made from reclaimed wood fiber and thermoplastic polymer. Fibrex is dimensionally stable: it doesn’t expand, contract, warp, or rot the way wood can, and it doesn’t fade or deteriorate the way vinyl can over time. It’s a genuinely low-maintenance material that holds up well over decades.
The Andersen 400 Series uses a wood frame with a vinyl-clad exterior. The wood interior gives you the warmth, character, and paintability of real wood inside your home. The vinyl-clad exterior protects the wood from weather without the maintenance burden of painted wood. It’s the classic Andersen construction that has made the 400 Series the bestselling window in the Andersen line for decades.
The 100 Series is the right answer when:
For many Bergen County and South Jersey homeowners with postwar housing stock, the 100 Series delivers full Andersen quality and warranty coverage at a more accessible price. It’s not the budget series — it’s the practical series
The 400 Series is the right answer when:
The 400 Series is Andersen’s most popular product for a reason: it’s the right answer for most homes in most markets. For Ridgewood Colonials, Teaneck Tudors, or Chester County stone homes, the 400 Series is typically the correct specification.
If your home has non-standard window openings, requires significant customization, or is at the premium end of the market, the A-Series and E-Series open up additional options beyond what the 100 and 400 Series offer. The A-Series in particular provides architect-grade performance with virtually unlimited configuration options — it’s the right choice for custom and historic applications where standard sizing won’t work.
For a complete comparison across all five Andersen series, our free in-home consultation walks you through every option and makes a specific recommendation for your home.
For most postwar Cape Cods, ranches, and split-levels: 100 Series delivers genuine Andersen quality at the most accessible price point in the line.
For most Colonials, Tudors, and homes where interior wood character matters: 400 Series is the standard recommendation.
For custom, historic, or premium applications: A-Series or E-Series.
Our free in-home consultations are available throughout NJ, PA, and Delaware. We measure every opening, walk you through your options, and make a specific recommendation for your home — no pressure, no obligation.
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