There are certain things you stop noticing when you live somewhere long enough. The brick rowhouses you pass on your way to work. The old school around the corner. The basement windows in the house you've walked past a hundred times.
In Baltimore, a lot of those basement windows are made of glass block.
They've been there for years, letting light into dark spaces, giving homeowners privacy, and quietly doing their job. They're not particularly flashy, and they're rarely the first thing anyone thinks about when making a list of home improvements.
But perhaps that's exactly why they deserve a little attention.
A City Built to Last (Mostly)
Baltimore has character. You can see it in the brickwork, the old storefronts, the churches, and the neighborhoods where houses have stood for generations. The same is true in surrounding communities like Parkville, Nottingham, and Perry Hall, where older homes and established buildings have their own stories to tell.
Of course, even a well-built building can't escape time.
Mortar slowly wears away. Weather finds its way into tiny cracks. A window that once looked perfectly solid may develop loose blocks or gaps around its edges. None of it happens overnight, which makes it surprisingly easy to miss.
And when something seems to be working just fine, it's human nature to leave it alone.
Until a damp basement, a draft, or a patch of crumbling mortar finally gets our attention.
The Curious Case of the Forgotten Window
Glass block had a good run in Baltimore. It became a familiar sight in basement windows, garages, commercial buildings, schools, and churches. It was practical: it let in daylight without sacrificing privacy, and it offered a sturdy option for spaces where a conventional window wasn't always ideal.
Then design tastes changed. New materials came along, home improvement trends moved on, and glass block lost some of its appeal as a design feature.
But buildings don't follow trends. And neither does the need to maintain them.
Today, many older glass block windows are still perfectly serviceable. Others need attention—not because glass block is outdated, but because decades of weather and wear have taken their toll.
There's a difference between something being old-fashioned and something being worn out.
The Trouble With Waiting
Here's where things get interesting.
A glass block window can look fine from the outside while the mortar around it slowly deteriorates. A little cracking might not seem urgent. A small gap might go unnoticed. And water has a habit of finding the places we'd rather not think about.
Sometimes the problem is the window itself. Sometimes it's the surrounding brickwork, the seal around the opening, or drainage near the foundation. In older buildings, the answer isn't always as simple as replacing a few blocks.
That's why proper inspection matters. A good repair starts with understanding what's actually happening, rather than simply covering up the evidence.
For homeowners and property managers across Baltimore, that can mean the difference between addressing a small maintenance issue and discovering a much bigger project later.
Old Buildings Need People Who Pay Attention
One of the best things about maintaining older properties is that not everything needs to be replaced. Sometimes a careful repair is all that's needed to keep a useful feature working for years to come.
Glass block windows can be repaired or replaced depending on their condition. Deteriorating mortar may need attention, and surrounding masonry may require repair to help keep moisture out.
It's not glamorous work, perhaps. But it's the sort of work that helps keep neighborhoods looking cared for and buildings serving the people who use them.
And with so many older homes and commercial properties in Baltimore, there's no shortage of windows, walls, and mortar joints that could use a second look.
A Little Attention Before Winter
As fall settles in and temperatures begin to drop, we start thinking about heating systems, gutters, roofs, and everything else that needs preparing for winter.
Basement windows deserve a place on that list, too.
Take a walk around your property. Look at the glass blocks. Check for cracked units, missing mortar, dampness, or signs that water has been getting in. If something looks questionable, have it checked before the weather turns colder.
Murphy & Company works with homeowners and property owners in Perry Hall, Parkville, Nottingham, and the surrounding Baltimore area on glass block window installation, replacement, and masonry repairs.
Because sometimes the most important improvements aren't the ones that transform a room overnight. They're the ones that quietly protect the building you've already got.
And in a city with as much history as Baltimore, that's worth looking after.
After all, the best way to preserve a building's character is to take care of the things that have been there all along.