Vinyl, Fibrex and Wood Windows

Wide Viewing Area Windows With An Extensive Portfolio of Designs To Choose

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View Some Of the Past Window Replacement Projects by Washington Energy Services

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

We hire only the most knowledgeable and best window replacement specialists, some of whom have been in the industry for over 20 years. One of our window specialists will be assigned just for you. They will work closely with you throughout the entire window replacement process. One go to contact to consult with before, during and even after your windows are installed.

Extensive Portfolio of Options

Foster your Inner Interior Design Skills

Your window replacement specialist will present you with an extensive portfolio full of options and provide recommendations that they’ve learned from years in the business. They can work with you to ensure the window you choose matches your home’s interior and exterior design, and your energy saving objectives. You’ll see plenty of options for color, trim, and matching doors, to make your window replacement project complete. Functionality is just as important as beauty. So they’ll go over the pros and cons of choosing different glass or shapes. Some glass options are better at insulating while others are better at letting in light. It all depends on your preferences. We have it all!

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 & conditions.

Why Window Installation Matters

No Short Cuts

Washington Energy Services takes the philosophy of quality over quantity when it comes to your window installation. We apply the nail-fin application because it allows us to use the nail fins on the sides of the windows to push flat against the house for extra support while serving as a moisture vapor barrier.
The flange gives us a solid platform to secure the window to the home from the front, flat against the house.

Short cuts taken by other window replacement companies will often cut the nail fins off. Doing so pushes the frame in the pocket. This forces 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 installation the correct way means we can install only 7 or 8 windows in a day. However, you can ensure a quality window installation so you’re windows will stay strong for years and years to come.

No Subcontractors

Keeping it in the House

We do not use subcontractors to install your windows. Your lovely new windows will be professionally replaced by employees of Washington Energy Services. We only hire the best employees who must be licensed, bonded and drug tested. We believe in continuous training to ensure high standards and quality window replacements.

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

This can be a sign that window replacement should be undertaken. Leaky windows are caused by several factors; improper installation, aging of certain window frame materials, or lack of caulking and care. Water can sneak it’s way into your home, showing up as condensation between panes of glass or it can go around windows and 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 making for poor insulation. This allows for a hot home on hot summer nights and a drafty home in the cold winter nights which ultimately costs you not only money but discomfort as well. These old style frames are especially difficult to find now-a-days because Seattle consumers have learned of their poor performance. Aluminum windows are getting removed and replaced slowly but surely from our Northwest homes. Most electric utilities offer significant rebates for the replacement of aluminum windows if you have electric heat in your home. They value the energy savings from new energy efficient windows as much as you will.

Single Pane Glass

According to ENERGY STAR, replacing single-pane windows for a typical home with an ENERGY STAR rated window can save you from $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

The type of window in your home plays a big role in noise transmission. Living near a busy street or a noisy neighborhood can make for lost sleep. Our noise reduction windows are created using advanced technology to reduce sound transmission. Seattle and Tacoma city homes or those near airports especially need noise barriers such as triple pane window glass, for families to enjoy peace and quiet.

Fading Furniture, Carpets & Drapes

Older Washington windows allow ultraviolet rays to beam through the windows causing the fabrics in your home to fade in color 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 Seattle window contractor with offices in Lynnwood and Tacoma. We have a highly skilled team of Washington window experts that understand the best options for our 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 educate you, and provide top quality products and services. Our professional window installers are our experienced employees and they work throughout Western Washington daily.

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. 

Do you use subcontractors to install windows?

Never. Our window installers are our own employees. We have expert crews which are factory trained for the specific windows we install and have done thousands of window installation projects, so you are in good hands.

What is the most popular Seattle window type and why?

While most older homes here were made with wood or aluminum single pane windows, the Seattle window replacements for them are now largely vinyl, fiberglass or wood-clad. By far, the majority are vinyl windows, and we recommend using insulated vinyl windows with double low E glass. The reason for those particular window replacement choices is that they are more energy efficient, and they perform better over time in our weather with almost no maintenance.

Older Seattle Windows

Most older homes have either wood or aluminum framed windows. Traditional wood windows can be beautiful if maintained, however sealing, staining or painting plus occasional refurbishing (sanding, new coats etc), is required. Wood windows are prone to rot, and in our climate moss can eat away at them and speed that rot. Moss is not just a green coating, when it’s removed you can see how it takes a bite out of surfaces, even pitting driveways. Once they rot, they will not take paint or stain as well and will degrade further over time.

Aluminum windows conduct heat and cold. The heat seeps out through the sash and frame, making them energy losers in our climate. The older aluminum single paned windows, without thermal breaks, are so energy inefficient that electric utilities are paying significant rebates to replace them. If you are interested in the durability of a metal frame exterior, but with energy efficiency and a nice interior, wood-clad windows now provide a great alternative. The wood-clad windows we provide are Anderson E-Series wood-clad windows. They have beautiful wood on the inside and the outside has a layer of durable metal to protect against weather.

Do you do window repair?

We are happy to repair windows and replace glass for our customers, and of course we are always here to service their warranties if needed. 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. It’s a great idea to improve the usability and resale value of your home. The Uniform Building Code is the requirement that builders and remodelers must follow. They use a term “egress” to describe the code. That refers to windows being a safe exit in case of a fire. The UBC has complete egress requirements on their website which are good to read before you place those 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.

Why all the info about finished? The height is very important as it is what will allow people to get up and out of the window. The sill and floor when unfinished could have a difference in height vs finished of up to an inch depending on things like flooring, carpet, sill material, trims etc. This is what the inspector will be looking for when they come to sign off.

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. EnergyStar rated windows are all Low E coated.

There are levels of Low E coating, eg: double Low E, triple Low E, these increase the energy efficiency of the window. To see how this works, go to our Vinyl windows page and compare the Signature Window to the Classic window. You’ll see that while both are EnergyStar rated energy efficient windows, the Signature, with triple Low E has a lower U value (more efficient). 

What is a mullion? 

Many windows have trim segments inside of the frames splitting them into smaller glass panels. Simply put, the pieces that are in 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 add 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 little handle that you turn – usually at the bottom of the frame on the inside. The little handle cranks the window open and closed. In the illustration below this is seen 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 window easy to operate









U-Factor and other common window replacement terminology explained

Every industry has it’s own terms that have evolved over time, for example the ones described in previous FAQ’s above: mullion and casement window.

Here are some other terms and brief window definitions:

  • Casing: The trim applied around the interior or exterior window opening to cover the gap between the frame and the wall is called casing. This is also known as face trim.
  • 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 indicate 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 and if this happens, just give us a call.
  • 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 protection from weather and insulation as well.
  • NFRC: The National Fenestration Rating Council. (Okay let’s stop and define Fenestration – that’s a fancy word for openings in your house including both windows and doors.) . This is the government agency that standardizes testing on windows and doors and rates them for efficiency. The NFRC labels provide the rating number so you can compare windows.

Here’s a fake NFRC label that comes from the NFRC website to demonstrate what they measure. You will note U Factor. We don’t have a huge amount of solar heat gain (SHGC) in the Northwest to worry about, so 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 better the product is at keeping heat inside. The other measures are visible transmittance, or how much light makes it through from the outside and air leakage, how much outside air can get in through this window. Good air leakage ratings fall between .1-.3.

NFRC Label








  • Picture window: A picture window is one which does not open, and is also called a fixed window.
  • Sash: A sash is the operating part of the window, that opens and closes it.
  • Seal: The seal is what keeps an insulated glass unit (IGU) closed to outside contaminants, and for energy efficient windows, keeps the argon gas inside. It is the combination of a sealant material and a spacer component.
  • Single hung: A single hung window slides open vertically, lifting up from the bottom. A Double hung window opens vertically from the top and from the bottom.



So, put our experienced professionals to work for you. Call 800-398-4663 or complete our FREE Estimate Form.
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