Follow Us

5 Common Window Buying Mistakes to Avoid | Stay Glassy Ep. 2

5 Common Window Buying Mistakes to Avoid | Stay Glassy Ep. 2

Most window buying mistakes don't show up until years after the project is done — and by then, they're expensive to fix. In Episode 2 of Stay Glassy, Newman Windows and Doors pros Maria and Duncan walk through the five most common window buying mistakes Southern California homeowners make: from falling for too-good-to-be-true deals and skipping energy efficiency, to choosing the wrong frame material, ignoring installation quality, and missing the fine print on warranties. If you're planning a window or door project, this episode could save you from a very costly lesson.

The 5 Most Common Window Buying Mistakes — and How to Avoid Them.

Key Takeaways from This Episode:

  • A “whole house special” price that seems impossibly low is impossibly low — unrealistic pricing and multi-year free financing both signal inflated base costs
  • If you still have single-pane windows in Southern California in 2025, you are wasting energy — dual-pane with low-E glass and a Title 24 package is the right spec for this climate
  • Triple-pane windows are overkill for Southern California — they're designed for cold climates and represent unnecessary cost in San Diego, Orange County, and LA
  • A great window installed poorly loses everything that made it great — installation quality matters as much as product quality
  • Choosing the wrong window style — a casement that swings into a narrow walkway, a fixed window where an operable one would improve airflow — is a mistake that lives with you for decades
  • “Lifetime guarantee” has become a buzzword — some lifetime warranties only cover parts for five years and never cover labor
  • If your dual-pane unit fogs and the manufacturer sends a replacement glass unit, you still have to pay a glazing company to install it — unless labor is explicitly covered
  • The single most important decision in any window project is choosing the right installation company — a company that cares about their work won't sell inferior products

Mistake 1: Falling for the Too-Good-to-Be-True Deal

Advertisements promising whole-house window replacements for $49.95 are not deals — they're bait. No legitimate company can replace 10 windows and two doors for that price. The other version of this trap is multi-year free financing offers. Twelve months same-as-cash is a standard and reasonable offer. Four-year free financing is a different story: the company offering it has inflated their base prices significantly to cover the financing cost, meaning you're paying a substantial premium whether you realize it or not. If the deal sounds impossible, it is.

Mistake 2: Not Considering Energy Efficiency

Single-pane windows in 2025 are simply wasting energy. Dual-pane windows have been the standard since the early 1990s. For Southern California specifically, the right specification is dual-pane glass with a low-E coating and a Title 24 energy package with argon gas fill — designed for the UV exposure and heat load of this specific climate. Triple-pane windows are engineered for cold climates dealing with extreme winter temperatures. In San Diego, Orange County, or LA, they're unnecessary cost for minimal additional benefit. Buy a window built for your environment.

Mistake 3: Ignoring Installation Quality

A high-quality window installed poorly will underperform a modest window installed correctly. Quality installation means the right caulking, the right expandable foam, the right trim, trained installers who know the product, and a company that takes responsibility for the outcome — not just the sale. It's difficult to evaluate installation quality from a quote alone, which is why checking references and choosing a company with a strong track record matters. A poorly installed window reveals its problems over years, not days — and by then, the company may be long gone.

Mistake 4: Choosing the Wrong Frame Material or Window Style

A casement window that cranks outward nearly three feet wide is the wrong choice for a narrow side yard or a tight patio. A fixed picture window is the wrong choice for a room that needs cross ventilation. A heavy-profile frame is the wrong choice for a small opening. Single-hung versus double-hung matters more on upper floors where cleaning access is a consideration. The direction a window opens should account for where the prevailing breeze comes from. These decisions seem minor at the planning stage and become permanent once the project is done. Work with a specialist who can evaluate your home's specific conditions — not someone who offers one configuration and calls it good.

Mistake 5: Skipping the Warranty Fine Print

“Lifetime guarantee” has become one of the most misleading phrases in the window industry. Some so-called lifetime warranties cover parts only, for as little as five years. Others cover the glass unit but not the labor to install a replacement. Here's the practical reality: when a dual-pane unit fogs and needs replacing, the glass itself is the inexpensive part. A glazing company's labor to remove the old unit and install the new one costs significantly more. If labor isn't explicitly covered in the warranty, that cost lands entirely on you. Read the warranty before you sign — not after something goes wrong.

Do I need triple-pane windows in Southern California? No. Triple-pane windows are designed for cold climates dealing with extreme winter temperatures. In Southern California, dual-pane windows with low-E glass and a Title 24 energy package with argon gas fill are the correct specification for the climate. Triple-pane is unnecessary cost for minimal additional benefit in this environment.

What is the difference between a parts warranty and a labor warranty? A parts warranty covers the window or door components — glass units, hardware, frame. A labor warranty covers the cost of having someone install a replacement part. Many manufacturer warranties cover parts only, leaving you responsible for installation labor when something fails. Since installation labor is typically the most expensive component of any service call, always confirm explicitly whether your warranty covers labor, for how long, and under what conditions.

How do I know if an installation company is reputable? Check references from past customers. Verify that the company holds a C17 Glazing Contractor's License in California. Confirm that all installers are covered by workers' compensation insurance. Ask how long they've been in business and what brands they carry — a company that cares about their work won't sell inferior products. The quality of the installation is what separates a window that performs for decades from one that causes problems within a few years.

Is fiberglass more durable than wood for doors and windows? Yes. Fiberglass doesn't warp, crack, develop dry rot, or attract termites. It holds paint and stain well and can be manufactured to look identical to wood — including grain patterns and textures. Once installed, fiberglass requires dramatically less ongoing maintenance than wood. A teaser for later episodes: fiberglass and Corvettes have something interesting in common — stay tuned.

📄 Full Episode Transcript — Click to Expand

Welcome back to Stay Glassy, Episode 2. I'm Maria. And I'm Duncan. Today we're talking about common window buying mistakes — and there are lots of them. You really want to stick around for this one.

Glazed and Confused: Homeowner Q&A

Q: Do fiberglass doors look like wood doors? I want to replace my wood door with fiberglass but still want it to look similar.
Yes — fiberglass doors are specifically designed to look like wood doors. They feature the same wider kick rail at the bottom and can be stained or painted to match a wide variety of wood finishes. The only challenge arises when trying to match a very specific style and rail profile on existing French doors — getting an exact dimensional match can be difficult. But for a standard entry door replacement, fiberglass is an excellent option that delivers the look of wood without the maintenance. And unlike wood, termites have no interest in it.

Q: Is fiberglass actually more durable than wood?
Yes. Fiberglass doesn't warp, crack, develop dry rot, or attract termites. It can be painted or stained, though like any painted surface it will eventually need recoating if exposed to prolonged sun. The key advantage is that fiberglass gives you control over the outcome — you can manage its appearance and longevity in a way that wood simply doesn't allow. Stay tuned for the connection between fiberglass doors and Corvettes.

Q: Why can't I find a company that sells steel doors anymore?
Steel doors haven't disappeared — they're just less common in residential applications. Several European and South American manufacturers still produce them, and they're making a comeback in commercial spaces and very contemporary homes. They're not as readily available as vinyl, fiberglass, wood, or aluminum. If a modern look is the goal, there are also many door options in other materials that achieve a contemporary aesthetic without requiring a steel door specifically.

Mistake 1: Falling for the Too-Good-to-Be-True Deal

Whole-house window replacement advertisements at impossibly low prices are bait, not deals. No legitimate company can replace 10 windows and two doors for $49.95. Multi-year free financing offers — four years, five years — are a different version of the same trap. The company offering them has built the financing cost into their base prices, meaning customers pay a significant premium whether they realize it or not. Twelve months same-as-cash is reasonable and common. Multi-year “free” financing almost always means you're overpaying for the product itself.

Mistake 2: Not Considering Energy Efficiency

Single-pane windows in Southern California in 2025 are wasting energy. Dual-pane windows have been the standard since 1993. The correct specification for Southern California is dual-pane glass with low-E coating and a Title 24 energy package with argon gas fill. This combination handles the UV exposure and heat load specific to this climate. Triple-pane windows are engineered for cold climates — in San Diego, Orange County, LA, or Riverside, they're unnecessary and represent cost without meaningful benefit. Buy a window built for your environment: dual-pane, low-E, vinyl or fiberglass frames.

Mistake 3: Ignoring Installation Quality

A quality window installed poorly will underperform a modest window installed well. Good installation requires quality caulking, proper expandable foam, quality trim, trained installers, and a company that takes responsibility for the outcome — not just the sale. Installation problems often don't appear immediately. They show up months or years later in the form of leaks, drafts, fogging, or trim failure. Check references. Verify credentials. Choose a company whose business is built around installation quality, not just product sales. The cheapest price is rarely the best value over time.

Mistake 4: Choosing the Wrong Frame Material or Window Style

Window style and configuration decisions have permanent consequences. A casement that swings out nearly three feet into a narrow walkway is the wrong choice for that location. A fixed picture window where an operable window would improve airflow is a missed opportunity. Single-hung versus double-hung matters more on upper floors. The direction a window opens should account for prevailing breeze direction. Frame material — vinyl, fiberglass, wood, aluminum — affects energy efficiency, maintenance requirements, and long-term performance. Work with a specialist who evaluates your home's specific conditions rather than applying one standard solution to every situation.

Mistake 5: Skipping the Warranty Fine Print

“Lifetime guarantee” has become a marketing phrase that can mean almost anything. Some lifetime warranties cover parts only, for as little as five years. Some cover the glass unit but not the labor to install a replacement. When a dual-pane unit fogs and needs replacing, the glass itself is the inexpensive component. A glazing company's labor to remove and replace it costs significantly more — and if labor isn't covered, that cost falls entirely on the homeowner. Read the warranty before signing. Understand what is covered, for how long, and whether labor is included. If a salesperson says “lifetime guarantee” and moves on, ask for the written details.

Safety with Savvy

This episode's safety segment featured a video of a seriously dangerous construction situation — heavy materials falling near workers, with people visibly at risk below. The point was direct: window and door installation is not a casual DIY project. There are many ways to get hurt, and many ways to hurt others. Always work with a licensed, trained installation company rather than attempting to handle structural work without proper expertise and equipment.

Key Takeaway

The single most important decision in any window or door project is choosing the right installation company. A company that genuinely cares about their work won't sell inferior products. Avoid unrealistic pricing, prioritize energy efficiency for your specific climate, check the warranty details before you sign, and work with people who take responsibility for the outcome — not just the sale.

Next episode (Episode 3): Enhancing curb appeal with entry doors — the wow factor every home needs. Visit newmanwindows.com/stay-glassy to submit your questions.


  • This field is for validation purposes and should be left unchanged.
  • Get In Touch

"*" indicates required fields

This field is for validation purposes and should be left unchanged.

Apply Here