Fiberglass Windows Deliver
the Highest Levels of Comfort and Energy Efficiency

Our Top Performing Windows
SeriousWindows fiberglass products are our top performing windows.

Ranging from an insulation rating of R-7 to R-11, (what is R-value?), our sustainable foam insulated windows have performance innovations that increase comfort, save money, and look great.

Serious fiberglass windows are practically maintenance-free. They take paint easily, come in a large selection of colors, do not warp, crack, rot, or corrode, and are very strong. Fiberglass frames are approximately three times stronger than aluminum and eight times stronger than vinyl, can be painted and withstand weather extremes from Arctic cold to desert heat to salty sea air. 

Environmentally Friendly
Fiberglass is a natural insulator and is 500 times less conductive than aluminum.
Also, because it's made of glass, the frame expands and contracts at the same rate as the glass in the window which further reduces energy leaks--unlike other window frames made of wood, aluminum, or vinyl.

Learn more about the advantages of fiberglass here.

Additionally, fiberglass takes the least amount of energy to produce and has the longest life expectancy of any window frame material, which is why leading experts say fiberglass is the most environmentally-friendly choice available.

Fiberglass frames are engineered to work in harmony with SeriousGlass Triple Suspended Film (TSF), Dual Suspended Film (DSF), or Single Suspended Film (SSF)  technologies, creating the most comfortable and energy-efficient windows on the market today.

Learn more about the advantages of Suspended Coated Film Insulating Glass over Triple Pane Glass.

SeriousWindows’ super-energy efficient fiberglass products are tested and labeled under the National Fenestration Rating Council’s (NFRC) rigorous energy rating and third party certification program.  For details on NFRC Energy Performance ratings,
go to www.NFRC.org.

725 Series – R7
Our lowest-priced fiberglass option that is still twice as efficient as competing brands and exceeds Energy Star standards by 100%.   Not only do you get the beauty and comfort you want in a window but also significant energy cost savings.

• Sustainable foam insulated fiberglass frame
• SeriousGlass Single Suspended Film glass package
• EcoSpacer
• Krypton gas

925 Series – R9
SeriousWindows 925 series still outperforms everything on the market — more than twice as efficient as rival brands and more than three times more efficient than Energy Star standards. The end result is a beautiful window that delivers the comfort and energy savings you are looking for.

• Sustainable foam insulated fiberglass frame
• SeriousGlass Dual Suspended Film glass package
• EcoSpacer
• Krypton gas

1125 Series — R11
The ultimate in energy-efficient windows, the SeriousWindows 1125 series exceeds Energy Star requirements by 300%  and is over three times more efficient than competing brands. These windows are a beautifully engineered combination of frame and glass and are the platinum-standard in windows, delivering the highest comfort and energy cost savings. 

• Sustainable foam insulated fiberglass frame 
• SeriousGlass Triple Suspended Film glass package
• Serious Materials’ proprietary EcoSpacer
• Xenon gas

 

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