glass block windowsGlass block windows are a popular choice for homeowners looking to add light and privacy to their homes. These windows, also known as glass brick or glass cube windows, are made of thick blocks or bricks of glass that are set into a frame and sealed with mortar. These windows have been around since the early 1900s and were primarily used in industrial and commercial buildings. However, in recent years, they have become increasingly popular for residential use due to their unique aesthetic appeal and practical benefits.

Choose Master Seal for window installation in Baltimore, Maryland. Call us at 855.608.1580 or reach out to us online for information about cost, design options, and the installation process.

Discover the wonders of Glass Block Windows in Baltimore, MD!

glass block windows three

The classic pattern providing normal privacy needs.

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Providing privacy with more style.

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Maximum privacy and adds medium light.

What Are Glass Block Windows?

Before you invest in glass block windows, it’s essential to understand what they are and how they can benefit your home. Unlike traditional windows made from glass panes, glass block windows are constructed from individual glass blocks sealed together to create a solid, impenetrable barrier. This design element makes them great for certain spaces where privacy, light diffusion, or energy efficiency is a priority.

While glass block windows come in different sizes and shapes, they’re most commonly used in basements, bathrooms, and other rooms where natural light is limited. They can also be used as decorative elements in hallways or stairwells to add a unique touch to your home’s design.

Glass block windows in Baltimore, MD are an attractive and eye-catching alternative to plate glass windows. With their variety of patterns, sizes and textures, Master Seal glass block products adapt to your needs in any room. Master Seal glass blocks are very popular for basements for added security and water tightness. They also allow 80% of available light to transmit in both directions. Options available are fresh air vents with screens, and special dryer vent blocks to allow you to vent your dryer out through the window.

Energy Efficient

Lower energy cost with glass block windows that have double the thermal resistance (R-value) of traditional single-glazed plate glass. There will be no energy-wasting drafts as you complete your solid wall while allowing 35% more light into your basement.

Security & Durability

These glass block wonders are the greatest windows for resisting potential intruders. They can be made to resist tornadoes, fire, hurricanes, earthquakes and even a bullet from a .357 magnum handgun!


Glass block windows are virtually maintenance-free and resist scratches and graffiti. Glass block windows never need to be painted or sealed! This makes glass block windows in Baltimore, MD a great window installation option for things like basements, attics, and garages. You won’t have to worry about them getting scratched up when you’re moving around storage items or doing work.


Glass block windows in Baltimore, MD are ideal for privacy purposes. You can customize the level of privacy you want based on the design of the glass, while still allowing a substantial amount of light to get through. This makes these windows a prime candidate for bathrooms and other areas where privacy is a top priority in your home.


Glass blocks are a beautiful alternative to plate glass or a vinyl window with window security bars option while being less expensive, more energy-efficient, and allowing more light into a dark basement. A pleasing effect of glass blocks is they constantly transform and manipulate color and light.

Glass block windows are the perfect choice for basement security. Do away with those metal bars, stop paying your alarm company and install glass block basement windows.

Get the unsurpassed strength and security of a Master Seal glass block window.

Master Seal uses only type S mortar for added security and strength. Type S mortar is specially formulated for glass block installations because of its superior adherence.

Additional Benefits of glass block:

  • Resistant to burglars
  • Brightens up the room
  • Choose from several decorative patterns
  • No maintenance
  • Superior insulating qualities for lower heating and cooling costs
  • Allow light in while maintaining your privacy

Choose from three distinct patterns of glass blocks. Each fulfilling a specific need for privacy, light transmission, and style.

Choose Master Seal for Glass Block Window Installation in Baltimore

If you’re considering glass block windows for your home, Master Seal is the clear choice for installation in Baltimore. With our customization options, energy efficiency, privacy and security features, and professional installation services, you can trust us with this important home improvement project. Contact us today at 855.608.1580 or online to learn more or schedule a consultation.