Here's Why You Should Actually Keep Those Outdated Glass Block Windows

Glass block windows were trendy in the 1980s, and believe it or not, they were actually making a comeback then. Incredibly, these glass products were first used in 1933, and they can be an instant indicator that a house is old or dated. Therefore, it makes sense to ask if glass block windows are going out of style. But before you conclude these windows have outlasted their welcome, consider this: These blocks have some serious hidden perks that make them worth keeping. Benefits like privacy, security, energy efficiency, and aesthetics are some of the reasons you should consider keeping these windows.

Let's start with privacy. Compared to regular windows, glass blocks are designed to be translucent, not transparent. You can't really see through them, which is why they usually don't even require window treatments. These blocks distort light and views effectively, yet they still flood your space with soft, diffused sunlight. This makes them ideal for bathrooms and basements that need privacy but would greatly benefit from the sunlight filtering in.

Glass blocks are also better for security. Walls made from these blocks aren't as easily broken as regular windows, so they could deter intruders from breaking into your home. This durability also means you wouldn't be changing them anytime soon, making them a very cost-effective window choice. Speaking of strength, glass blocks are naturally fire-resistant. These blocks can resist high temperatures for 45 to 90 minutes — depending on the design and rating — and are a great way to protect your home against fires.

With the way prices are skyrocketing, no one should build a house without considering energy efficiency. You should know that glass blocks are a better option for insulation than regular windows. They're actually comparable to double-pane windows in terms of efficiency. This is because of their unique manufacturing process, as most blocks have an air gap in the center — rather than being solid — which serves as an additional layer of insulation. Coupled with their airtight installation that prevents heat from escaping in the winter, these blocks are a window choice that will help keep your energy bills low.

Also, glass blocks are waterproof thanks to their tightly sealed joints. Unlike traditional windows that can leak or develop condensation issues, properly installed glass blocks are sealed with mortar joints that create an impenetrable barrier against moisture. It's yet another reason why they're great for bathrooms and basements. They're also relatively soundproof, muffling street noise better than standard windows — an easy way to make your home noise-free if you live near a busy road.

Then there's the nostalgia factor. Paired with minimalist finishes, these blocks add a retro-futuristic charm to your home that feels intentional rather than dated. And let's be honest: In a world of cookie-cutter homes, keeping a few unique features can help your space stand out. So don't write off your glass blocks just yet.