Old Glass Block Windows in Baltimore Homes

That Little Basement Window May Be Telling You Something

If you own an older home in Baltimore, White Marsh, Perry Hall, or Bel Air, there is a good chance you have a glass block window somewhere in your home.

Maybe it is in the basement. Maybe it is behind storage shelves or tucked away in a utility room. Maybe it has been there so long that you barely notice it anymore.

But those old glass block windows are often one of the most overlooked parts of an older home.

Over time, homeowners may start noticing:

Water around the basement window
Cracked glass blocks
Deteriorating mortar joints
Drafts and moisture issues
A basement that feels damp or musty
A window that no longer provides the security it once did

Many homeowners don't realize they have a glass block window problem until the damage has already started.

DO YOU NEED GLASS BLOCK REPAIR? CONTACT US TODAY!

Why Are Glass Block Windows So Common in Baltimore?

Baltimore has thousands of older homes, rowhouses, schools, churches, and commercial buildings where glass block windows became a popular choice.

They made sense because they provided:

Privacy without needing curtains or blinds
Natural light in basements and lower-level spaces
Added security compared with traditional basement windows
A durable solution for masonry openings

From Baltimore City rowhomes to older buildings in White Marsh, Perry Hall, and Harford County, many of these original glass block installations are now several decades old.

And like any part of your home, age eventually catches up.

Is Your Glass Block Window Failing?

Many homeowners ask:

"Can old glass block windows leak?"

Yes. The blocks themselves are durable, but the areas around them can deteriorate over time. The mortar joints, surrounding masonry, and installation can become vulnerable to Maryland's changing weather.

"Should I replace my basement glass block window?"

A replacement may be worth considering if you notice:

Cracks in the blocks
Loose or missing mortar
Water intrusion
Damaged surrounding brick or masonry
Poor ventilation
An outdated installation

"Are glass block windows still a good option?"

Modern glass block windows can still be a great solution for areas where homeowners want light, privacy, and security — especially basements, bathrooms, and utility areas.

Baltimore Weather Can Be Hard on Old Glass Block

Maryland weather gives homes a lot to handle:

Heavy summer rain
Humidity
Freezing temperatures
Snow and ice
Constant freeze-and-thaw cycles

Small cracks and aging joints can allow moisture to slowly create bigger problems.

Addressing an aging glass block window before it becomes a larger basement issue can help protect your home.

Not Just Homes: Baltimore's Older Buildings Have Them Too

Glass block isn't only found in houses.

Many older:

Schools
Churches
Apartment buildings
Commercial properties

still have glass block windows installed decades ago.

Property owners often overlook them because they are not traditional windows — but they are still part of the building envelope and deserve attention.

Why Murphy & Company for Glass Block Window Replacement?

Replacing glass block windows is not just swapping out a window. It requires understanding the opening, surrounding masonry, moisture concerns, and the right installation approach.

At Murphy & Company, Ed Murphy helps homeowners throughout Baltimore, White Marsh, Bel Air, Perry Hall, and Harford County find solutions for aging exterior problems — including outdated or damaged glass block windows.

Sometimes the biggest problems in your home are the ones you stop noticing.

The Problem You Didn't Know You Had: