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Grow Into Sustainability's Newest Award-Winning Technology

Thin glass is producing amazing results so we've expanded our manufacturing to make it available for everyone.

The clear advantages of ThinGlass

The use of thin glass for the center panes provides some of the most energy efficient windows on the market today

Award-Winning Innovation

 Alpen's thin glass triple and quad pane insulated glass units are Building Green Top 10 Products for 2020, and DOE's Berkeley Labs have said thin triple super windows "could save billions".

Improved Performance...
SAME PRICE!

Superior U-factors, increased condensation resistance (CR) and increased visible light transmission (VT)--all at the same price as our high performance suspended film windows.

Nearly Limitless Options

Alpen has a longstanding reputation for producing multiple window options in a wide array of performance profiles, shapes and colors.
ThinGlass continues that legacy.

Verified Window Data

Performance you can count on that has been tested and verified by the National Fenestration Rating Council--the gold standard of the window industry.

Increased Manufacturing Capacity

Our new and expanded manufacturing facility provides the capacity to complete your job--no matter what size it is--in record time.

Made In & Shipped From the U.S.

Manufactured, serviced and shipped from Colorado means you get exceptional shipping times and technical support from experienced local staff.

Changing the definition of "Sustainable Building"

With the addition of thin glass production to our lineup, we realized we didn't have enough manufacturing space to meet the increasing demands for both our high performance windows AND the addition of this amazing new technology, which has been grabbing so much public attention.

So, we did what any growing family does--we moved to a bigger place!

ThinGlass-dedicated production areas

Increased manufacturing capacity

Accelerated production and delivery speeds

A few of the places already benefiting from Alpen windows, doors and glass


The 'thin triple' super window design doubles the thermal performance of current Energy Star-rated double-glazed windows and is seven times more insulating than a single-glazed window.

Berkeley Labs, Dept. of Energy


The 'thin triple' super window design doubles the thermal performance of current Energy Star-rated double-glazed windows and is seven times more insulating than a single-glazed window.

Berkeley Labs, Dept. of Energy


The 'thin triple' super window design doubles the thermal performance of current Energy Star-rated double-glazed windows and is seven times more insulating than a single-glazed window.

Berkeley Labs, Dept. of Energy

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High Performance Windows
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