Glass Block Basement Windows
Benefits of Glass Block Windows
Security - It is very difficult to break glass blocks. Some products offer additional security features.
Energy Efficiency - 10 times more energy efficient than most basement or bathroom windows in older homes. Standard glass block have the energy efficiency approximately equal to most thermal pane windows.
Cost Effective - Installed cost is usually the same or less than other window replacement options. Reduce the risk of lawsuits by adding exhaust fans to provide more environmentally friendly lower floor living space.
Maintenance Free - There is no need to caulk these windows after they are installed.
More Light - In many cases the old frame is removed which allows more light through the glass block window than your old window.
Privacy - Glass block is often used to increase privacy of window openings while not sacrificing light transmission.
Professional Installation Service - We professionally install these windows for you!
WE INSTALL - Click here for a free estimate!
The Pittsburgh Corning Promise
The comprehensive variety of patterns, styles, and sizes available have been designed to work together in your projects as a total system. Pittsburgh Corning stands behind all glass block units when used exclusively with Pittsburgh Corning accessory products by offering a limited five-year warranty.
Preassembled Windows
Security with over 50 years of proven performance, your Pittsburgh Corning Glass Block panels are available preassembled. Your local Pittsburgh Corning Authorized Distributor can help answer all of your questions and offer professional assistance and quick, easy installation. You can choose standard or custom sizes, with or without ventilation.
Since 1937, Pittsburgh Corning has been the “glass block authority." No other line of glass block is entirely American-made, comes in as many styles and sizes and is as reliable and widely available. No other glass block has Pittsburgh Corning’s industry famous quality control. Intruders like basement windows because they're easy to break or pry open and are
often shielded. Reduce the threat of forced-entry by installing
preassembled Pittsburgh Corning Glass Block. Above ground applications such as bathrooms and kitchens could also be ideal for preassembled panels.Save Energy with Low Maintenance
Pittsburgh Corning Glass Block windows eliminate the need for storm windows and reduce the energy required for heating and air conditioning.With Pittsburgh Corning Glass Block windows, you can forget about painting, caulking and puttying. There's nothing to peel, rot or rust. To clean, simply hose the outside and wipe the inside lightly with a damp cloth.
Choose from three distinct patterns, each offering its own unique style, degree of light transmission and privacy. Perfect for replacement or new-window and small-partition applications. Preassembled panels are available with or without vents.
ICESCAPES Pattern non-directional pattern lets light in without sacrificing privacy. Maximum light transmission/medium to maximum privacy.” 
DECORA® Pattern, with its trademark wavy undulations, provides maximum light transmission with subtle visual distortion. Basement Windows Installation Instructions(PDF)
| Comparison | ||
| Single Pane Window — 1/8" Flat Sheet | Pittsburgh Corning Mortared Glass Block Window | |
| Energy efficiency | Minimal insulating value. | Comparable to a double pane window. Eliminates drafts. |
| Window Treatment | Needed to control privacy, thus adding extra costs. | No need. Privacy controlled by pattern selection. |
| Security | Susceptible to breakage, entry and loss of household contents. | Resists breakage and entry. Reduces the risk of burglary. |
| Replacement: | Breakage requires replacement of whole window. | Simple block replacement at minimal cost. |
| Water Penetration | Could be a problem with below-grade installation. | Water resistant. Acts as solid concrete block wall. |
| Cost | Pittsburgh Corning Glass Block windows are often less expensive. Check with your local distributor. | Very comparable or less expensive. |