Some varieties are bullet, vandal, fire resistant, or hurricane resistant.Įnergy Efficiency Marks New Glass Block WindowsĮnergy efficiency is just the newest property to be built into some glass block windows, which often meet federal Energy Star Efficiency guidelines. When framed in vinyl, they protect against water intrusions. When installed in basements, they can integrate dryer vents to eliminate the need for other openings in the home’s foundation. They are easy to open when vents are installed. When equipped with air vents, removable sashes, and power vents, they improve indoor air quality. 
Requiring no annual caulking or grouting, they are low maintenance. Mortared into a home’s foundation and hard to penetrate, they promote safety and security. Advantages of Glass Block Windowsĭepending on their composition and construction, modern glass block windows offer many advantages By the 1930s, the blocks were two halves of glass fused together, which opened the door to many new sizes, shapes, styles, and patterns of glass block that could be installed individually or combined to make pre-made windows. The first ones had different wall thicknesses and tended to form condensation inside, but once they were made by machine they quickly became recognized as a useful architectural element. Glass block windows are the ideal way to let light into basements, bathrooms, garages, and other areas where security and privacy are highly valued.įirst developed in Great Britain in the 1880s, the windows were originally blown by mouth and resembled open bottles. 
If you think “security” when you think of glass block windows, you are properly identifying one of the most well-known characteristics of these window coverings.Ĭomprised of blocks of glass or acrylic rather than panes of glass, they are capable of letting in light, yet are thick, break resistant, and impenetrable.
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