when only the best will do

EnerLux fiberglass casement windows are some of the highest performing fiberglass windows available today. With the help of some of the top minds in the fiberglass fenestration industry and implementing the highest quality components on the market we ensure that our products will perform over the lifetime of your home.

Fiberglass Casement Windows

Benefits of EnerLux Fiberglass Casement Windows

  • Pultruded fiberglass frame and sash with corners that are silicone sealed and chemically bonded together utilizing our proprietary Super Strength Corner (S2C) System. Allowing for no air or water to enter through the window at the corners, a vulnerable place on windows.
  • Triple weather-striping and multi-point locking system allows our fiberglass casement windows to be closed tightly providing air-tight and water-tight perimeter.
  • More Space for Argon: 1” insulated glass unit for double pane and 1 3/8” IG unit for triple pane allowing more space between panes to be filled with Argon or Krypton gas.
  • Thicker Glass: Minimum 3.90MM glass thickness which gives the window more sound proofing characteristics and increased energy efficiency.
  • Casement Strength: Our fiberglass casement windows can be built 30% larger than other material casement windows due to fiberglass being 8 times stronger than vinyl and twice as strong as aluminum. This is also possible due to our Super Strength Corner System and worldwide leading Roto hardware.
  • Foam Filled Frames: Improve the energy efficiency and quietness of the window.
  • FlexScreen with BetterVue mesh: comes standard on all fiberglass casement windows to provide a seamless transition between the window and the screen with no visible frame.
  • 2.25” Profile: Our casement profile and fixed casement profile appear 100% symmetrical with a 2.25” profile and the fixed casement uses a wool pile weatherstrip on the exterior of the frame

Why choose fiberglass casement windows over single or double hung windows?

If you want a quick read, to sum it up, casement windows are much more energy efficient than single and double hung windows. But keep reading for a little more in-depth information. At EnerLux, our focus is to provide our customers with the highest performing and most energy efficient windows on the market. In order to do this, we have put many different things in place such as using fiberglass, the most energy efficient material for windows, using worldwide leading hardware, and using the best glass packages on the market. The materials of the windows are definitely the most important piece to this puzzle, however, there is one other thing we decided to do to make sure all our windows have optimal energy efficiency once being installed in your home. Manufacturing and selling the most energy efficient type of windows, casements and awnings.


The casement window is the superior window for energy efficiency regarding windows that open. With a multi-lock system and triple weather stripping, the window is pulled in and sealed tightly, virtually eliminating all water and air infiltration. When a casement window is open, it provides optimal ventilation. Unlike hung and slider windows, the entire window opens to allow a nice breeze in your home. Casement windows also allow for a better view ofthe outdoors, not having a bulky frame in the middle of the window like hung windows.


Single and double hung windows are not as tightly sealed which will cause more air and water infiltration into your home. This is due to the windows sliding vertically to lock instead of being pulled inward. Since the windows meet in the middle, one is set further inside so when the wind is blowing it will be easier to have a draft or water to get inside. The maintenance of hung windows is much higher than on casement windows due to the pulley mechanisms which can stiffen or rust over time.

Fiberglass Casement Windows Energy Efficiency

Fiberglass Casement Windows Superior Strength

Fiberglass Casement Windows Expansion & Contraction


Fiberglass Casement Windows 3D Navigator

View more detailed drawings of our Casement and Awning windows, click here.

Insulated Glass Packages
LoE 180
LoE 2 270
LoE 3 366
LoE 3 340

For more information on our energy efficient insulated glass packages, click here.

Glass Upgrades
Neat Glass
Preserve Glass

For more information on our glass upgrades, click here.

Decorative & Tinted Glass Options

English Reed

English Reed





Satin Etch

Satin Etch

Glue Chip

Glue Chip

To view more decorative and tinted glass options, click here

Color Options

For more information on our color options, click here
Hardware Options

To learn more about our hardware options, click here

Decorative Grilles
Queen Anne


To learn more about our decorative grille options, click here.


BetterVue Screen Mesh

BetterVue Screen

All Casement and Awning windows come standard with BetterVue Screens. BetterVue screens use a much finer mesh that allows 20% more visual clarity, 20% more airflow, 20% more visible light and protection against smaller insects.

Minimum and Maximum Dimensions

<td “>Max Height

FIBERGLASS WINDOWS Min. Width Max Width Min. Height
Casement 16″ 42″ 24″ 84″
Awning 20″ 60″ 16″ 72″
Fixed Casement 14″ 120″ 14″ 120″
Low Profile Picture 11″ 144″ 11″ 144″

* Oversized Awnings must be approved before purchase
** Only one dimension can exceed 84″

For a printable PDF version of our Min-Max dimension, click here.

AAMA Test Ratings

These tests have been performed as per the following standards: AAMA/MWDA 101/I.S.2-97

For a printable PDF version of our AAMA structural test ratings, click here


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    • "After extensive research, EnerLux was the only company I found that provided a passive solar window with a good U value at a fair price."

      Leslie Z. (Hastings, NE)


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