Vinyl, Fibrex and Wood Windows

Unobstructed views, stunning designs.

Image Gallery

View Past Window Replacement Projects by Washington Energy Services

[nggallery id=3]

Frequently Asked Window Replacement Questions

Why is Washington Energy Services the best choice for window replacement?

Your Own Window Replacement Consultant

One Contact from Beginning to End

Think of your WES window specialist as a partner. From beginning to end, this professional will also be your dedicated consultant to recommend, install, and ensure your windows are the right fit for your home.

Extensive Portfolio of Options

Channel Your Inner Designer

Explore a portfolio of classic, traditional, and modern window options and take advantage of your window specialist’s years of experience. From vibrant colors and specialty sizes, to intricate designs and matching doors, you’ll find the style and functionality that works for you. Plus, your window specialist can explain the various options regarding material, glass, energy efficiency, and more.

100% Satisfaction Guarantee

Peace of Mind at Last

If you are not completely happy with your purchase, we will remove your window replacement and refund your money. See full terms and conditions.

Why Window Installation Matters

No Short Cuts

Washington Energy Services believes in quality over quantity when it comes to your window installation. We apply the nail-fin application because it provides extra support and serves as a moisture vapor barrier.

Short cuts taken by other window replacement companies include cutting off the nail fins. Doing so pushes the frame in the pocket, forcing them to go inside the house to screw at a diagonal through the frame in order to secure it. This compromises the structure and weakens the frame. Be cautious of companies that advertise a fast installation.

A quality, correct installation from WES results in 7 or 8 windows installed per day. We take the extra steps to ensure every window is installed to last. Again, quality over quantity will always be our philosophy.

No Subcontractors

Keeping it in the House

We do not use subcontractors to install your windows. Your windows will be professionally installed by Washington Energy Services employees only.

In fact, we don’t even consider ourselves contractors. We’re craftsmen who are passionate about what we do.

Protective Film

Traveling Safely to Your Home

All windows are shipped with a protective film sealed to the glass to ensure they arrive smudge, scratch, and dirt free.

What signs or symptoms indicate I need new windows?

Leaky Windows

Leaky windows are caused by several factors: improper installation, aging of certain window frame materials, or lack of caulking and care. Water can sneak its way into your home, showing up as condensation between panes of glass, or under the siding, causing rot. This is especially problematic here in the Northwest. Excess moisture is the perfect environment for mold and mildew growth in your home, and of course, for leaky windows.

Aluminum Framed Windows

Aluminum window frames conduct heat rapidly, which results in poor insulation. This costly occurrence causes hot summer days and cold winter nights. These old style frames are becoming increasingly difficult to find and are slowly being replaced by more efficient solutions. Most electric utilities offer significant rebates for the replacement of aluminum windows if you have electric heat in your home.

Single Pane Glass

According to ENERGY STAR, replacing single-pane windows in a typical home with ENERGY STAR rated windows can save $146-$501 annually and 1,147-3,839 pounds of CO₂ ( In addition, upgrading to double or triple pane windows will increase your overall home comfort and security.

Noise Problems

Windows play a big role in noise transmission, especially if you live near a busy street or a noisy neighbor. Those living near airports may especially want to consider noise barriers such as triple pane window glass to enjoy peace and quiet.

Fading Furniture, Carpets and Drapes

Older windows allow ultraviolet rays to beam through, which can cause fabrics to fade over time. Our Low E windows block up to 95% of the sun’s ultraviolet light to protect your valuables while still allowing natural light into your home.

Does Washington Energy Services do window installations in my area?

Yes, Washington Energy Services is a Puget Sound area window contractor with offices in Lynnwood and Tacoma. We have a highly skilled team of Washington window experts that understand the best options for the Northwest climate.

If you are considering replacement windows, our home energy specialists will help you evaluate the latest energy efficient fiberglass, wood-clad, and vinyl windows. Our no-hassle approach is to first consult with you on your options, and then provide top quality products and services tailored to your needs and preferences. Our long legacy of service speaks for itself.

Let’s get started.

Are there utility rebates for installation of Washington windows?

Yes! We are a qualified contractor with Puget Sound Energy (PSE), Snohomish PUD, and Tacoma Power, and offer their rebates for energy efficient windows. To learn more, visit our rebates center. 

What is the most popular Seattle window type and why?

While most older homes here were originally constructed with wood or aluminum single pane windows, they are most frequently replaced with vinyl, fiberglass, or wood-clad windows. Vinyl windows are by far the most popular choice, and we most often recommend using insulated vinyl windows with double low E glass because of their efficiency, performance, and low maintenance.

Do you do window repair?

WES can repair windows and replace glass and service warranties for our customers. However, we do not offer glass replacement for those who have not purchased windows from us.

What are the fire codes for new window installations?

Let’s say you want to turn a daylight basement or bonus room into an extra bedroom. The Uniform Building Code is the requirement that builders and remodelers must follow. They use the term “egress” to describe the code, which refers to windows being a safe exit in case of a fire. The UBC has complete egress requirements on their website, which we recommend reading before placing windows in your new room. In short, one window in the room must have:

  • Minimum of 5.7 sq. ft of opening that is clear and accessible.
  • With a minimum of 24 in. of clear height and 20 in. of clear width.
  • And a finished sill height of 44 in or less above the finished floor.

The height is very important as it is the key indicator of one’s ability to get up and out of the window. The sill and floor, when unfinished, may have a difference in height over a finished sill and floor. An inspector will verify this before signing off on the room.

What does Low E mean?

Low E stands for Low Emissivity and it pertains to the ability of the window to restrict the flow of heat. The Low E window will keep heat on the side of the glass where it needs to be (outside in the summer and inside in the winter). Today’s energy efficient windows are all Low E-coated. This is a coating consisting of a super thin metallic layer that is applied to the third surface of a double-paned insulated glass unit (IGU). It allows light to pass through (light is short waved), but reflects longer wave heat energy. ENERGY STAR rated windows are all Low E-coated.

There are varying levels of Low E coating, such as double Low E and triple Low E. These measurements pertain to the energy efficiency of the window. To see how this works, visit our Vinyl Windows page and compare the Signature Window to the Classic window. You’ll see that while both are ENERGY STAR rated windows, the Signature features triple Low E and a lower U value, resulting in a more efficient solution. 

What is a mullion? 

Many windows have trim segments inside of the frames, splitting them into smaller glass panels. Simply put, the pieces between the glass and sash are called mullion. They hold the glass in place but are not the same thickness as the sash. The result is called a mulled window. These are beautiful windows that can add timeless charm to a home.

What is a casement window?

A casement window is one that hinges on the side of a frame and has a small turn-handle—usually at the bottom of the frame on the inside. The handle cranks the window open and closed. The illustration below shows the mechanics from the outside of the house. As the crank is turned the window opens out. You’ve likely seen these windows all of your life, but may not have known they were called casement windows.

beautiful vinyl casement window

Casement windows are easy to operate.



U-Factor and other common window terminology explained:

Every industry has its own terms that have evolved over time, and windows are no exception. Check out these terms and definitions:

  • Casing: Also known as face trim, casing is the trim applied around the interior or exterior window opening to cover the gap between the frame and the wall.
  • Condensation:  This is moisture that forms on a surface when it is colder than the dew point (temperature at which dew forms). The condensation can be on the outside of the window, which may be a function of other aspects of your home (for example, where your water heater vents) or on the inside of the window between the panes. The presence of condensation between glass panes is typically an indication that the seal of the window has failed. If your windows are still warrantied, this can be easily fixed by replacing the glass unit. Our Signature series vinyl windows have a lifetime warranty against seal failure.
  • Deglaze: The deglazing process is removing the glass from the window frame.
  • Double strength glass: 1/8″ thick glass is considered double strength.
  • Lite: A “lite” is a single piece of glass or glass section within a window or a door.
  • Nail Fin: The nail fin is a flange or strip on the sides of a window frame that is created when the frame is made to permit secure fastening of the window to a structure. We use the nail fin method of installing windows because the nail fin will fit tightly onto the house, providing greater insulation and protection from weather.
  • NFRC: The National Fenestration Rating Council. (Fenestration refers to the openings in your house including both windows and doors.) This government agency standardizes testing on windows and doors and rates them for efficiency. The NFRC labels provide the rating number so you can compare windows.

This replica NFRC label demonstrates the various measurements. You will note U Factor. We don’t have a huge amount of solar heat gain (SHGC) in the Northwest to worry about. Therefore, U factor—a measure that translates to energy efficiency—will be most important to us.  The U-factor measures how well the window keeps heat from escaping. The lower the U factor, the more efficient the product is at keeping heat inside. Another measure is visible transmittance, or how much light makes it through from the outside and air leakage. Air movement, or air leakage, is also measured. Optimal air leakage ratings fall between .1-.3.

NFRC Label








  • Picture window: A picture window, or fixed window, is one that does not open.
  • Sash: A sash is the operating part of the window that allows it to open and close.
  • Seal: The seal is what keeps an insulated glass unit (IGU) closed to outside contaminants. For energy efficient windows, the seal keeps the argon gas inside. It is the combination of a sealant material and a spacer component.
  • Single hung and double hung windows: Single-hung windows have only a lower operating sash for ventilation. Double-hung windows have two operating sashes that move up and down, allowing for ventilation on the top, bottom, or both.



So, put our experienced professionals to work for you. Call 800-398-4663 or complete our FREE Estimate Form.
Join our Energy Solutions Newsletter and learn to make your home more efficient: