Andersen 100 vs. 400 Series: Which Window Fits Your McHenry County Home?

Short version: both are real Andersen windows, and we install both every week. The 100 Series is Fibrex composite and the budget-smart pick. The 400 Series is wood inside, vinyl-clad outside, and our best-seller. The price gap per window is smaller than most people expect.

Here’s my bias up front: we sell both of these. Innovative Home Concepts is Andersen Elite Certified, the highest tier Andersen gives a contractor, and the only Elite Certified contractor in McHenry County. We’ve been installing replacement windows across McHenry County for 21 years. So I don’t win anything by trash-talking one series to push you into the other. What I can do is tell you how I walk homeowners through this exact choice at kitchen tables from Woodstock to Cary, because it comes up on almost every window estimate we run.

What’s the actual difference between the Andersen 100 and 400 Series?

One material decision. Everything else follows from it.

The 100 Series is built from Fibrex, Andersen’s own composite. Andersen describes it as a blend of wood fiber and thermoplastic polymer, and says it’s twice as strong as vinyl and won’t fade, flake, blister, or peel (their published specs are here). People hear “composite” and assume it’s a dressed-up vinyl window. It isn’t. Here’s how I put it at the kitchen table: the 100 Series is a genuinely economical window. Think of it as competing with a high-end vinyl window, except the material isn’t vinyl, and that’s the advantage. You’re probably looking at ten to twenty percent more than a good vinyl window, and for that you get a stronger frame, slimmer lines, and no repaint cycle. Ever. Know what you’re buying, though: white inside and out, exterior color options, and a couple of interior colors. No wood options. That’s the 100 Series market, and inside it, it’s the smart buy. We did a full 100 Series breakdown if you want the deep dive on that one product.

The 400 Series is your bread-and-butter wood window. If you’ve got a nice house, a custom build, or you just care about quality and want real wood inside, this is the way to go. Real wood on the interior, with Andersen’s Perma-Shield cladding on the exterior, which Andersen describes as a proprietary high-grade vinyl formed around the wood (source: Andersen’s 400 Series page). So the weather side never asks you to paint it, and the inside of your house gets actual wood. If you’ve got stained trim in an older Crystal Lake or Woodstock home, that matters a lot. The 400 line also carries more window types, including bay and bow and the Woodwright double-hung.

Andersen 100 vs. 400: side-by-side comparison

*Standard sizes, fully installed. Oversized openings and custom shapes price up. A real number comes from measuring your house, not from a table.

What do Andersen 100 and 400 Series windows cost in McHenry County?

These are our real 2026 installed ranges, not internet averages. A 100 Series window runs $900 to $1,200 per opening installed. A 400 Series runs $1,200 to $1,600. And “installed” means the whole job: we pull the old window, haul it away, set the new unit with standard hardware, and handle standard trim work inside and out. No surprise line items at the end.

Look at those numbers again. The gap between series is a few hundred dollars per window. On a whole house it adds up, sure, but plenty of families expect the 400 to cost double and it just doesn’t. A typical full-house project of 10 to 15 windows lands between $12,000 and $40,000-plus depending on which series you pick, how many openings you have, and how much custom sizing is involved. The full Andersen lineup stretches from about $900 per opening up past $8,000 for big custom openings in the upper series. Our windows cost guide breaks the whole ladder down.

One scheduling note, because everyone asks. Standard lead time is 4 to 6 weeks from signed contract to install, and it can stretch longer in the busy season from April through October. Windows are not an impulse buy. If you want them in before the cold, the clock starts now.

How do both series handle McHenry County winters?

McHenry County sits in climate Zone 5A. From November through March we bounce above and below freezing over and over, and that freeze-thaw cycling is brutal on painted exteriors, cheap vinyl, and sloppy installs. It’s the same story we tell on siding, and it’s why “never needs painting” isn’t a luxury pitch here. It’s maintenance math.

Both series answer it the same way on the weather side: the 100 Series because Fibrex doesn’t take paint in the first place, and the 400 Series because the cladding is the exterior. Where you feel the difference is inside, in the glass package you choose. The 400 Series comes standard with dual-pane glass and offers triple-pane and Low-E upgrades, and picking that package for a north-facing wall versus a sunroom is exactly the conversation we have at the estimate.

One local wrinkle most national blogs never mention: some McHenry County municipalities set specific U-factor minimums on replacement windows in their energy codes. We check the active code with the local permit office before we order, so the window that goes in is the window that passes inspection. That’s not a homeowner problem. That’s our job.

Which one do we recommend?

The 400 Series is our best-seller, and Andersen itself calls the 400 its most popular line, hands down. There’s a reason. Most of the homes we work on around here have wood trim somebody cares about, and a wood interior window sits in that room like it was always there. Composite is clean and sharp. Wood is warm. That’s taste, not spec sheet, and taste is allowed to win on the room you live in.

So when do I point somebody at the 100 Series? When the budget has a ceiling and the trim is painted anyway. On a painted-trim ranch, the 100 Series gives you Andersen quality, slimmer frames, and zero exterior upkeep for a few hundred dollars less per opening. Multiply that by 14 windows. That’s real money. Not a downgrade, a smart allocation.

Two honest cautions. First, don’t let anyone sell you a series before they’ve seen your house. Second, if you’ve been shopping and gotten confused by the difference between Andersen windows from a dealer like us and the Renewal side of the company, that’s a separate decision with its own math, and we wrote an Andersen vs. Renewal comparison that walks through it straight.

And one thing that applies to both, because people ask if the 100 Series is somehow “less Andersen”: it isn’t. Both series are backed by the same company that’s been building windows since 1903, and Andersen calls itself the number-one trusted and recommended window brand in America. Everything that comes with us being the Elite Certified contractor here, the training, the spec-correct install, the accountability, applies to both series equally. You’re choosing a material and a budget, not a tier of seriousness.

See both series in person before you decide

Here’s the advice I’d give my own family: stop comparing brochures and go put your hands on the windows. Our showroom at 4410 IL-176, Ste 1 in Crystal Lake has a 100 Series display set up, and we can walk you through the 400 Series options right next to it. Feel the frame weight. Run the sash. Ten minutes in front of the real thing settles arguments that three weeks of internet research can’t.

And the work is out there to look at, too. The bay elevation in the photos on this page is a 100 Series job our crew ran in Long Grove. We’ve set 100 Series windows on window projects in Richmond and across the county line in both directions. After 7,000-plus projects over 21 years, chances are decent we’ve already done a house shaped like yours.

Frequently asked questions

Is the Andersen 100 Series a vinyl window?

No. The 100 Series is made from Fibrex, Andersen’s composite of wood fiber and thermoplastic polymer. Andersen states it’s twice as strong as vinyl and won’t fade, flake, blister, or peel. It competes on price with better vinyl windows, but it’s a different material.

Is the 400 Series worth the extra cost?

If the wood interior matters to your rooms, usually yes. In our market the difference is $1,200–$1,600 versus $900–$1,200 per opening installed, so you’re weighing a few hundred dollars per window against a real wood interior and a deeper options list. It’s our best-seller for a reason, but it’s not automatic.

How much do Andersen windows cost installed in McHenry County?

The 100 Series runs $900–$1,200 per opening installed and the 400 Series runs $1,200–$1,600, standard sizes. A typical whole-house project of 10 to 15 windows lands between $12,000 and $40,000-plus. Oversized and custom-shape openings price higher.

How long does an Andersen window project take?

Plan on 4 to 6 weeks from signed contract to install day, longer during the April-to-October busy season. The install itself is the short part. The lead time is the part that catches people planning around winter.

Can I see the 100 and 400 Series somewhere in person?

Yes. Our Crystal Lake showroom at 4410 IL-176, Ste 1 has a 100 Series display, and we’ll walk you through 400 Series options alongside it. No appointment gymnastics. Come look, then decide.

Get your McHenry County window estimate

The chart gets you close. The right answer comes from your actual house, your trim, your budget, and somebody who has hung both series for years telling you the truth about which one fits. That’s the estimate we run.

Call or text (815) 356-9020 or request your free estimate. We’re the Andersen Elite Certified contractor for McHenry County, and we’ll give you the same answer we’d give family.

— Rhett Wilborn, Innovative Home Concepts, Crystal Lake, IL

Rhett Wilborn

President & Founder, Innovative Home Concepts

Rhett Wilborn founded Innovative Home Concepts in 2005 and has led the company through 20+ years of exterior remodeling across McHenry County, IL. IHC is McHenry County's only Andersen Elite Certified Contractor, a James Hardie Select Contractor installing Hardie since 2008, and the exclusive GutterShutter dealer for McHenry + Lake Counties.

Published July 28, 2026 · Updated July 25, 2026