Do you feel cold drafts coming into your windows during the fall and winter? Are your energy bills through the roof? Do the sounds of your neighbors leaving for work in the early morning wake you? If you answered yes to any of these questions, it’s time to improve your quality of living with window replacements!

Not only can you resolve these issues, but you can also reduce maintenance, improve curb appeal, and provide overall greater comfort for you and your family. And since window replacements represent one of the highest returns on investment associated with home improvement, you may regain more than 78% of the project cost when you sell your home.

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Choose from Various Window Styles for Your Home

As a top window company in Lancaster and Chester Counties, Twin Brook Construction is proud to partner with Marvin Windows for all your window needs! Marvin windows are a great option because of their proven quality, energy-efficient technology, superior insulation, strength, and durability. Plus, they have a wide array of window styles. Please choose from these types of windows and let us help you with the installation!

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Double-Hung Windows

Double-hung windows incorporate movement of both the top and bottom portions of your window, but only one-half of the window can remain open at a time. They’re versatile and complement virtually any home style, plus they’re easy to clean and energy-efficient. They also readily accept screens and air conditioners. Double-hung windows aren’t as airtight as other windows, like casement windows, for example.

A white walk-in closet with a single-hung window at the back.

Single Hung Windows

With a single-hung window, only the bottom panel moves up and down while the top remains stationary. The best part about them? They are low cost. They’ll run you upwards of 20% less than a double-hung window. But those savings come with limitations, namely with limited ventilation and more difficulty in cleaning. A double-hung window may be a better option if you’re replacing your windows.

A beige house with red shutters and green grass.

Bay & Bow Windows

Bay windows are angled out and away from the house and include three components—a large, fixed window in the center with two flanking windows. A bow window is a set of four to six windows projecting from your home’s exterior, but each is the same size. Because they are more symmetrical than a bay window, they create more of a curved appearance while also letting more light into a room.

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Casement Windows

Casement windows open sideways with a hand crank. They are one of the more weather-tight windows you can buy because the seal meets the window sash straight on. By the same token, they provide a good deal of ventilation while also being easy to clean. Unfortunately, they usually can’t accommodate AC units, and with continuous exposure to elements, their moving parts can wear out or break easily.

An interior room with floor-to-ceiling corner windows.


Corner windows are a single pane comprised of two more sashes that meet at a corner and span both sides of your house. Marvin’s Ultimate Corner windows offer panoramic views while providing a focal point for your home. While it requires special framing, our window installation company can ensure they are safe and secure. These windows are available in heights up to 12 feet and widths up to seven feet.

A picture window with a view of the outside.


Picture windows provide a clear, unobstructed view of your surroundings. For that reason, they are large and have no glazing bars. They are made to look like a picture frame around your outdoor scenery. More often than not, picture windows are inoperable, which helps to make them highly energy-efficient. They provide lots of warm, natural light, perfect for many different areas in your home.

Sliding windows on a gray wall with a view of trees outside.


Often referred to as gliding windows, this window style has sashes that move left or right in either direction within a single frame. You can think of sliding windows as rotated double-hung windows that move left and right instead of up and down. Sliding windows require little maintenance, are durable, have good energy efficiency, and are easy to use. You’ll just have to go outdoors to clean their exterior.

A trapezoid-shaped window in the attic.

Specialty Shape Windows

Polygons. Trapezoids. Triangles. You’re only limited by your imagination. Marvin’s windows, in particular, are great to work with when creating a one-of-a-kind window design. You’ll find plenty of options that fit your unique window opening, allowing you to relish all the benefits of new window installation. Energy efficiency, improved curb appeal, and less outside noise are a call away!

Ready to Replace Your Old Windows?

Whether you know exactly which window type you want or need some help deciding, our window installation company can assist you! We’ve replaced windows at homes and businesses across our service area of Lancaster and Chester counties in Pennsylvania. Get started today by scheduling your design consultation!

How Do I Choose the Right Window Type?

With such a broad selection of exterior windows, choosing the right window style for your window installation or replacement project can be intimidating. It pays to keep some of the following tips in mind when selecting replacement windows:

  1. Make sure your windows complement your home’s architectural style.
  2. Know the intended use of your windows. For example, will they add extra light, enhance an entryway, or be purely for ornament?
  3. Consider the color of your window frames and mullions—the vertical bar that forms a division between units of a window.
  4. Decide whether you want fixed windows versus operable windows for ventilation
  5. Determine the sun’s potential impact on heating, cooling, and even entertaining in relation to your windows.

These insights will help you decide which of these styles best fits your window replacement needs.

Understanding the Marvin’s Window Difference

As your window replacement company, you can trust us to only partner with the best window manufacturer on the market. That’s why we choose Marvin for all your window and door needs. Marvin’s windows offer a wide variety of styles to complement your home. And just like their windows, Marvin’s differences are crystal clear.

With a superior product and high-quality standards, you’ll also enjoy Marvin’s 10-year warranty on manufacturing and parts and a 20-year warranty on insulating glass. Some of the other guarantees you get when you use Marvin’s windows in your next project include the following:

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Energy Savings

Marvin’s windows come with the latest eco-friendly, energy-efficient glass options that help keep your house warm in the winter and cool in the summer. Their windows always meet or exceed ENERGY STAR® guidelines. Marvin’s fiberglass windows also have added insulation to perform in hot, cold, and wet climates while reducing your overall utility costs.

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Beautiful Designs

Regardless of your architectural style—historic, craftsman, Victorian, traditional, or ultra-modern—Marvin has a replacement window style to match. Thin profiles allow for large window expanses that bring the outdoors into your home. Marvin fiberglass windows can even mimic authentic wood, allowing you to match your home’s existing style.

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Consistent Quality

Marvin is consistently recognized for its high ratings and popularity among homeowners. The company’s Infinity line of products incorporates Ultrex, a fiberglass compound stronger than vinyl and more durable than any other window material on the market. Infinity windows will hold up 38% longer than vinyl and are resistant to chalking, fading, shrinking, and swelling.

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Why Use Twin Brook for Your Window Installation or Replacement?

windows with awningWe know that installing new windows throughout your home can be a frustrating process. But with a respected window installation and window replacement company in Gap, PA, like us, you don’t have to worry. We handle every aspect of your project, from the initial estimate all the way through to completion. You’ll get the quality window installation or window replacement you expect with our team there for you every step of the way. In addition, you’ll enjoy these two great benefits:

Your Projects Get Done Quickly

Watching your window installation or replacement project linger can be frustrating. That won’t happen with us. We have a full-time staff and access to sub-contractors to make sure we adequately staff your project to get it done on time.

Your Projects Get Done Right

Fast completion is one thing. Getting the project done quickly and accurately is another. Our craftsmen pay attention to the details to ensure your window installation not only provides the aesthetics you’re after but also delivers the construction quality required to ensure energy efficiency and longevity.

Customers We’ve Helped Before

Whether you’re looking for window repair to replace a broken window or all new windows throughout your home, we can help! We’ve served the West Chester, Wayne, Villanova, Bryn Mawr, and Downingtown areas for years. Along the way, we’ve tackled a lot of window replacements, not to mention bathroom and kitchen remodels, as well as other home improvement projects. See for yourself.

Experience the Difference Window Replacement Can Have on Your Home

If you’re tired of recaulking the seams around your windows to prevent drafts or want to decrease the amount of outside noise pollution you hear, then it’s time to call us for a window replacement. Our team of experts has been helping homeowners like you for over a decade. Get in touch with us today to start discussing your window installation project!

Find Additional Information on Our Blog

Want to know more about the advantages of Marvin’s windows? Are you wondering what goes into a window replacement project? You’ll find the answers to these questions and more on our blog!