St. Louis Window Buying Guide

Everything you need to know about replacement windows can be found on this page. We created this guide to help homeowners make better window buying decisions. If at ANY time you have a question, call us 24/7. We’re here to help!

Homeowners who choose us are amazed by how hassle-free we make getting brand new O’Fallon replacement windows. From pricing through the completion of the installation, we have improved everything you thought you knew about window replacement.

The old way involves a complicated, drawn out, high-pressure in-home sales presentation.

The Zen Windows Way is fast, zero-hassle, 100% accurate quote process that saves time and frustration.

Looking for replacement windows “near me” in O’Fallon or anywhere in the St. Louis area?

Contact Zen Windows online or call (314) 399-0856 now to get started now! No hassles, no pressure, no stress, and no money down!

Instead of advertising a low price then trying to upsell you to higher-priced windows and add-ons, the Zen Windows Way offers firm, clear quotes. The price we give you is a price you can count on paying when the project is finished.

You’ll Love Our Window Replacement Process

Our customers often marvel at just how easy we make window replacement in O’Fallon, MO, and our clean & simple process is no accident. We take pride in viewing every step of the process from the homeowner’s perspective.

The beauty of the Zen Windows Way is that you end up with attractive, high-quality windows without all the stress and hassle typically associated with window contractors in O’Fallon, MO. Here how our innovative process works.

Step 1: Five-Minute Quotes
Our quote process is straightforward and simple – You call us and a representative takes a few minutes to ask you some questions. We then give you some quick information about who we are, skipping the lengthy sales pitch. Additionally, we use technology to bring up pictures of your home, which allows us to give you the most accurate quote. In 5 or 10 minutes, you are off the phone.

Step 2: Emailed Quote Within 1 Business Day
Within one business day, we’ll email you a rock-solid quote that is exact, right down to the penny. You won’t have to worry about any surprises or hidden fees, and our no pressure process means you can take all the time you need to decide, with no pressure to buy now. On top of that, unlike other replacement-window contractors in O’Fallon, MO, you’ll never hear us using pricing gimmicks where “this price is only good for today.”

Step 3: A Small Handful of Additional Emails About Our Products & Service
As you go through the process of making an informed decision, we’ll also email you some additional information to get a better idea of our products and services. You’ll get links to product demonstration videos so you get a good idea of the quality of our windows. We’ll also send you testimonials from other homeowners about their experience with Zen Windows. We will never bombard you with a ton of irrelevant sales messages for fill your inbox with spam – just the facts.

Contact us online now or call (314) 399-0856 to get your free, no-hassle quote for replacement windows!

Get Top Quality Windows for Less in O’Fallon, MO

Do you want your new replacement windows to cost you more every month? Of course not, and you shouldn’t have to!

Save money each month by investing in energy efficient replacement windows in O’Fallon, MO!

The Economics of Energy Efficient Windows

Most people don’t understand how much money is leaking out their windows each month in the form of wasted energy. This is especially true for windows that are more than 10 years old.

And, of course, wasted energy means higher energy bills. Remember:

  • As energy costs rise, there are few things as valuable as energy efficient products on your home. Although energy costs fluctuate, they continuously go up over time, and that trend is expected to continue for the foreseeable future.
  • With uncertainty about climate change, heating and cooling needs could very well increase significantly, making it even more important to outfit your home with energy-saving replacement windows. Good windows don’t just keep you warmer in the winter; they also help keep your home cooler in the summer by reducing heat transfer.

The bottom line is homeowners need to protect themselves as much as possible from energy price increases. Investing in new technology and new products, such as energy efficient windows, for O’Fallon, MO home is one of the best ways to accomplish this.

Call (314) 399-0856 or contact Zen Windows online now to get a quote on energy-efficient windows for your O’Fallon home!

All of Our Replacement Windows Are Energy Efficient

With replacement windows from Zen, you get peace of mind because every window we install in O’Fallon, MO is energy efficient. We won’t sell inferior windows for one simple reason: they will cost our customers more in the long run in the form of higher energy bills.

Replacement windows for an O'Fallon, MO homeEven our most modestly priced windows are equipped with a sophisticated, double-insulating Solar Low-E glass system. This Solar Low-E system incorporates:

  • Double-strength glass
  • A high-performance Low-E coating
  • A stainless steel Intercept™ spacer system and argon gas

This superior blend of technologies is just our most basic option. There are also a variety of upgrade options, like:

  • A triple glass configuration
  • Several different Low-E coatings
  • Spacer options
  • Other custom options so your replacement windows can be designed to perfectly suit your needs

While glass and coatings are the most important energy efficient factors, weather-stripping and foam insulation also play a role in energy efficiency. All our windows come with strategically-placed, superior, wool-pile weather-stripping. In addition, foam insulation comes standard on some of our windows and is available as an upgrade option on others.

No matter which of our windows you choose, you will be getting an energy efficient choice. We have ‘good, better, and best’ options, so you can find the windows in O’Fallon, MO that keep your comfort level high and your energy bills lower.

Changing the Way People Buy Windows & Sliding Doors in O’Fallon, MO

With Zen Windows St. Louis, you get premium products, top-quality replacement services, and industry-leading warranties! Plus, we’ll never ask for money down, and we’ll never add on hidden fees. Give us a call to see why we’re a top choice for replacement windows in and around O’Fallon, MO.

Call (314) 399-0856 or contact us online now to get a free, zero-hassle quote on replacement windows today!

Not in O’Fallon, MO? Check out our entire window replacement service area HERE.

Determine What Type of Windows You Need

The first step in the window buying process is simple, you need to determine what type of windows you need AND what quantity you need. Below, you will find all the different window styles we carry. Use the images as a reference as you make your notes.

What we recommend is simply walking around your house with a notepad and jotting down how many windows you have + a count of each type of window. Also, you will want to note if you have any oversized windows (windows that measure larger than 17 sq. ft. – 101 unified inches, e.g. 41″ X 60″ = 101″).

The reason we ask that you note any oversized windows is those windows cost us slightly more in terms of materials. Windows under this size are pretty much the same cost in terms of glass and vinyl. We keep things simple with this “standard vs. oversized” pricing model.

Here’s an example of what your notes might look like once you get done walking around your home…

  • Double Hung Windows – 11 (1 Oversized)
  • Casement Windows – 2
  • Picture Windows – 3 (1 Oversized)
  • Slider Windows – 2
  • Total # of Windows = 18

Notice that in the list above we know how many windows we need, what type of windows they are, and that there are two windows that would be considered oversized.

Once you get this list you’re ready to proceed to the next step.

Here’s the window types for you reference (you can click on any of the window names to read more about that type of window):

Pick Your Colors, Woodgrains, & Grids

So, you’ve got your list of windows—awesome! Now, it’s time to pick out colors, woodgrains, and grids.

If you have trouble picking out what style you want, give us a call. We can tell you what’s most popular and help guide you through the process. Honestly, MOST windows are simply “white inside, white outside” meaning they are your standard white, vinyl windows both inside and out. You really CAN’T go wrong with this timeless look. However, feel free to pick from any of the colors below. You’ll want to determine your inside color AND your outside color.

Here’s your options and note that we DO offer custom colors too!

All vinyl replacement windows are available in White (standard) and Beige colors. Select window models are available in brown.

Maintenance-Free Grids

Choose from a variety of decorative grid patterns for your vinyl replacement windows to enhance the architecture of your home. Our decorative grids are sealed between the panes of glass in the insulating glass units. Select from the following options.

Once you get to this point you know how many windows you need and you have a good idea of what colors / grids you want (don’t worry, if you need some help picking from the many options available we are here to help). Now comes the part everyone struggles with… picking out the BEST St. Louis window replacement company for the installation.

But you’re not just selecting a company—you are selecting a company AND their line of windows, so you need to “grade” the companies on these criterias:

  • Type of Company (Big Brand Vs. Local)
  • Reputation (Online reviews, BBB membership, etc.)
  • Quality of Windows (Check third party quality and energy efficiency ratings)
  • Price of Windows

After you grade each company on the above criteria, you should have a short list comprised of 2-3 companies to get a window installation quote from. CLICK HERE once you ready to get a quote.

We’ve written in depth about each of the four criterias above. Keep reading below, and if you have any questions visit our FAQ page or call us 7 days a week! Our #1 mission is to make each and every person’s window buying experience as pain free as possible!

Types of Window Replacement Companies

You really have two different types of companies to pick from: “Big Brand” vs. “Local”

“Big Brand” Window Companies
The big brand companies are your Andersens, Pellas, and so forth. These companies may be household names, but to become a household name it takes MILLIONS of marketing dollars to be spent. What’s important to note about the big brand companies is the fact that they carry a VERY large amount of overhead. Think of it like this…

If a company has to employ multiple people to run all over town in $50,000 work trucks to give “hard sell” price quotes, how do you think that affects their bids? Or what about the TV commercials, mass direct mail campaigns, billboards, and so forth? Obviously this means they have to make up for all that money they are spending, leading to HIGHER prices.

Now here’s the part most of these companies don’t want you to know – Their salesmen are TRAINED to sell hard and to sell you on the “benefits of working with a big, reputable company” compared to the little guys. They’ll stress that they offer the highest-quality vinyl windows while often times this just isn’t true.

Basically, they try to convince homeowners using a professional salesmen that if they DON’T pay these inflated prices they just won’t get a high quality window, and that’s flat out not true.

“Local” Window Companies
On the opposite end of the spectrum you have your locally owned and operated window companies. These companies tend to compete more on price and service. Where the big brands compete in branding and mass market appeal, the smaller, more agile local companies compete on service, relationships, and often times price.

See a local company has much less overhead, allowing the owner to set prices for THE SAME quality windows at a much lower price. Often times, you will get to work directly with the owner as well, which a lot of homeowners view as a major benefit compared to working with just a “salesman” or “project manager”.

Where Does Zen Windows Fit?
Honestly, Zen Windows fits right in the middle, offering the client the best of both worlds. We are a national brand, which gives us large scale knowledge of the industry, relationships with manufacturers, and more. BUT, we are locally owned and operated meaning you will speak directly with the owner.

We also have a very unique process. We DON’T send a high-priced salesmen to your home—there’s just no need to. We can SAVE that cost, that overhead, and pass it on to you, the buyer, as savings. You can read more about what it’s like to work with us HERE.



What you want to do is look at every possible review source for each company you are considering. Maybe it’s us, Window World, and Andersen, perfect. Do read the reviews for each of the three companies on:

And just compare them. What do past customers have to say? Do they not even have reviews?

If a company is not actively acquiring reviews on these sources there is a good chance they simply don’t have a lot of customer who were ecstatic to have worked with them!

This may sound harsh, but it’s the truth. In today’s digital age the consumer is empowered to speak their mind online in seconds.

If a company consistently “WOWS” their customers with great service, quality, and prices that wow factor will translate into online reviews, period.

So go ahead, compare us to the other 2-3 companies and see how we stack up!

Quality of Windows

A number of homeowners today install new replacement windows not only to improve the appearance of their homes, but also to take advantage of the energy saving capabilities that these modern types of windows are able to provide. Unlike their older counterparts, they are more effective in keeping rain, wind, sleet, and snow out of your home during winter while at the same time maintaining the warm temperature inside that keeps your indoors comfortable during the cold season.

During summer, they prevent the cool air from escaping out of your house keeping your indoors cool and airy. This ability of modern windows not only keeps your home comfortable regardless of the time of the year; they can also significantly lower your cooling and heating costs by at least 25%. These major qualities are truly what defines energy efficient replacement windows today.

Essentially, the most energy efficient windows are those that have the ability to keep heat transfer to a minimum, which makes the material used for the window frame a major consideration. This reduction of heat transfer is responsible in keeping the heat within the home during winter and letting it out during summer. The double glazed glass pack that has a PPG Intercept spacer or a foam Super Spacer in between the glass panels can further reduce the heat transfer to a minimum.

In addition, the glass technology used in modern replacement windows has greatly improved through the years. For instance, there’s the low emissivity coating that is able to reflect heat back in the form of infrared light without compromising the amount of natural light that gets into the room. As for the materials used in the construction of the frames and sashes, vinyl ranks high in terms of energy efficiency.

The design of the windows is equally given the attention to make replacement windows even more efficient especially in sealing out air and preventing water infiltration. Those that have sashes that directly close snugly into pocket headers and sills perform better. In addition, the sashes particularly on vinyl windows come with rubber seals and weather strips further improving the units’ sealing ability.

In the past, the frames of the windows were mechanically connected through nails or screws. This method does not only weaken up over time, it also creates gaps that allow air and water to get in. To address this issue, vinyl windows today have their sashes and frames welded together providing stronger and better ability to withstand bend and flex movements without loosening up while at the same time provide protection against natural elements.

To put it simply, the production of modern replacement windows has come a long way resulting to the creation of units that do not only last far longer but also perform way better than their older versions. Today more than ever, the decision as to whether to get new windows or not has become a no brainer for most homeowners. In St. Louis, getting new windows is a decision made simpler by Zen Windows. Call us today and get your quote within 5 minutes and have your windows installed as soon as possible.

Price of Windows

Everybody loves a good price. People will buy goods or services if they get a good deal. However, in the home improvement industry, you have to be wary of products that are sold very cheaply. In most cases, you always get what you paid for. As the saying goes, “Buy cheap and you’ll end up buying twice.”

When you shop for new replacement windows, you will discover that they can vary in price ranging from $200 to as much as and even more than $1500. If you choose windows that cost from $200 to $400, you may think that you have found a good deal and will be able to save money, but not long after, you will find yourself looking for new windows again. This is because this type of windows doesn’t last for a long time either because of the sub-standard quality of the unit and installation or poor window warranty. Largely because they will only serve you for a short time, these windows are often referred to as rental windows.

Meanwhile, there are windows that cost $600. They are often sold by companies who are in the business for the long haul. These windows more often than not boast of excellent quality, which is further complemented with excellent installation services.

On the other hand, there are windows that are priced at $1500 each. They actually have the same quality as those windows that only cost $600. How is this possible? You see, just as windows are not created equal, so are window companies. There are companies out there who want to make money fast at the expense of customers who don’t know better. Needless to say, gullible customers become easy targets. Don’t get this wrong. The windows are often of good quality and the installation just as great. But the thing is, you can have the same quality for a lot less.

So, what does the huge diversity in price tell you? It should tell you to choose your window company really well. Find those who care more about your needs than the money they can potentially earn. Look for companies who have been in the industry for years. Chances are that they are reputable companies who have long established their reputation based on integrity, honesty, and quality products and services.
You will have the assurance that in case of problems with your units, a good company will offer you the kind of support that you can rely on at any given time and will respond to your call right away. They will deal with the problem within 24 hours.

When you think about it, when you choose the windows that cost $600, you will not only get quality products and services at a reasonable price, you will also get more value in your investment knowing that the company you’re dealing will give you the peace of mind that your investments are well protected.

Still Need More Info?

A window replacement project can be overwhelming especially when you have never tried it before. Homeowners who have taken this route in the past will tell you that it is not exactly a walk in the park. There are so many factors to consider and decisions to make. For one thing, there are many types and kinds of windows to choose from. You have to weigh their pros and cons to be able to make the most out of the benefits they can offer your home.
In addition, you have to choose which among the materials available to use on your windows to ensure high energy performance, strength, and longevity. While the internet can be useful, you will also be bombarded with an overload of information that oftentimes it can be difficult to determine which information is truly helpful and reliable. Needless to say, the whole experience can be overwhelming.
Here’s some information that will help you sort things out and enable you to make an informed decision later on when it comes to your replacement windows.

Click on any of the titles below to find out more:

What Are Single Hung Replacement Windows?
What Are Double Hung Replacement Windows?
Double Hung Vs Single Hung
Is Vinyl Your Best Or Worst Choice for Replacement Windows?
What Is Air Infiltration?
What Makes A Good Window “Good”?