Top 10 Best Glass Block Window Replacement Companies in Pittsburgh, PA

Looking for glass block window replacement in Pittsburgh? Here are the top 10 companies rated by experience, warranty & service. Get a free estimate today!

If your basement or bathroom windows are cracking, leaking, or simply showing their age, replacing them with glass blocks is one of the smartest upgrades a Pittsburgh homeowner can make. But with so many contractors out there, how do you know who to trust?

We've done the research for you. Here are the top 10 glass block window replacement companies in Pittsburgh, PA - ranked by experience, warranty, service quality, and local reputation. Our top pick comes first.

#1 Best Glass Block Pro ⭐ TOP PICK

Badges: Veteran-Owned | Factory Direct | 20-Year Warranty | No Subcontractors | Free Estimates

📍 2167 Mercer Rd, Suite 101, New Brighton, PA 15066 🌐 When it comes to glass block window replacement in Pittsburgh, Best Glass Block Pro is the clear #1 choice - and it's not even close.

Founded in 1994, this veteran-owned, factory-direct contractor has spent over 30 years perfecting the art of glass block window replacement across Pittsburgh, Beaver County, Allegheny County, and the greater Western Pennsylvania area. They manufacture their own glass block windows in-house and install every project with their own trained team - no middlemen, no subcontractors, no shortcuts.

Pittsburgh homeowners choose Best Glass Block Pro for everything from single cracked block replacements to full basement window overhauls and custom bathroom glass block upgrades. Their wave-pattern and premium series glass block windows are among the most popular choices in the Pittsburgh metro area - delivering privacy, natural light, and lasting durability without the maintenance headaches of traditional windows.

What really separates them from the competition is their industry-leading 20-year warranty - the strongest guarantee you'll find from any glass block replacement company in Pittsburgh. Every job is handled from start to finish by their own team, and they leave every site cleaner than they found it.

If you're searching for glass block window replacement near Pittsburgh, PA, start here. You won't need to look anywhere else.

#2 - Pittsburgh Glass Block (RGF Industries)

Badges: 60+ Years in Business | Pre-Assembled Windows | 5 Locations

📍 Pittsburgh, PA

Pittsburgh Glass Block is one of the oldest names in the business, operating in the Western Pennsylvania market since 1965. Part of the RGF Industries family, they specialize in pre-assembled glass block replacement windows, fresh-air vinyl vents, and glass block shower kits. Their CrystaLok® vinyl-framed replacement windows are widely used across Pittsburgh and the surrounding suburbs. With five regional locations, they offer broad coverage for Allegheny County and Beaver County homeowners. A reliable, established option for those who prefer a large company with a long track record.

#3 - Maier Glass Block

Badges: 40+ Years | Residential & Commercial | Greater Pittsburgh Service Area

📍 Pittsburgh, PA

Maier Glass Block has been a trusted name in Pittsburgh glass block replacement for over four decades. They handle both residential and commercial replacement projects — from single window swaps to large-scale commercial glass block wall installations. Their regional knowledge of the Pittsburgh market is strong, and they bring a dependable track record to every project. A solid choice for Allegheny County homeowners looking for an experienced local replacement contractor.

#4 - Allegheny Glass Block

Badges: 10-Year Warranty | Free Estimates | Masonry + Glass Block

📍 Pittsburgh, PA

Allegheny Glass Block pairs masonry expertise with glass block window replacement - a combination that works especially well for Pittsburgh's older homes where window openings often need structural attention before replacement can begin. They offer a 10-year warranty and free estimates, with service across Allegheny County and Beaver County. If your replacement project involves crumbling masonry or foundation issues, Allegheny Glass Block's dual expertise makes them a smart choice.

#5 - Dun-Rite Window and Door

Badges: Highly Rated on Angi | Fast Response | Beaver County Based

📍 Beaver County, PA

Dun-Rite Window and Door earns consistent praise from Pittsburgh-area homeowners on Angi for their thoroughness and fast response times. While not a pure glass block specialist, they handle glass block window replacement as part of a broader window and door service — making them a practical option for homeowners who need multiple window replacements handled in a single visit. Strong communication and attention to detail are recurring themes in their customer reviews.

#6 - Plum Glass Block

Badges: 38 Years in Business | Full Cement Joints | Residential & Commercial

📍 Plum Borough, PA

Plum Glass Block has been completing glass block window replacements using traditional full cement mortar joints for 38 years. This old-school installation method is preferred by some Pittsburgh homeowners for its structural durability and long-term reliability. They serve residential and commercial clients across the Pittsburgh metro area and are known for precise, clean replacement work. If you want a mortar-set glass block done the traditional way, Plum Glass Block is worth a call.

#7 - RGF Glass Block

Badges: Pre-Assembled Specialist | Regional Network | 40+ Years

📍 Pittsburgh, PA - 5 Locations

RGF Glass Block is the manufacturing backbone behind Pittsburgh Glass Block, providing pre-assembled replacement windows, vented glass block units, and installation products to contractors and homeowners across the Pittsburgh market. They've been operating in Western Pennsylvania for over 40 years and have expanded to five full-service locations across the Midwest and Northeast. Best suited for new construction projects or homeowners who want factory-assembled replacement windows installed quickly and cleanly.

#8 - Aliquippa Glass & Mirror Co.

Badges: 5.0 Star Rating | Local Business | Custom Glass Work

📍 Aliquippa, PA

Aliquippa Glass & Mirror Co. carries a perfect 5.0 rating on Angi and has built a strong reputation for going above and beyond on challenging glass replacement projects across the Pittsburgh metro area. While their primary focus is general glass and mirror work rather than dedicated glass block replacement, their local Beaver County presence, attention to detail, and spotless clean-up record make them a good option for smaller replacement jobs in the Aliquippa and Pittsburgh areas.

#9 - Hopkins Masonry and Restoration

Badges: Masonry Specialist | Block Wall Expert | Highly Reviewed

📍 Pittsburgh Metro, PA

Hopkins Masonry and Restoration brings strong masonry credentials to glass block window replacement projects across the Pittsburgh area. Customer reviews highlight complete satisfaction and excellent finished results on block wall projects. While primarily a masonry contractor, their structural expertise makes them a reliable partner for glass block replacements where the existing masonry opening needs repair or reinforcement before new windows can be installed.

#10 - Gatsby Glass Pittsburgh

Badges: Custom Glass | Frameless Options | Commercial Focus

📍 Pittsburgh, PA

Gatsby Glass serves the greater Pittsburgh area with custom glass solutions including frameless shower enclosures, glass partitions, and storefront installations. While not a traditional glass block replacement specialist, they are a strong alternative for Pittsburgh homeowners or commercial property owners looking for modern glass wall and partition options alongside or instead of traditional glass block replacement. Their custom design capabilities and local Pittsburgh presence make them a useful option for renovation projects with a contemporary aesthetic.

Final Verdict

For glass block window replacement in Pittsburgh, PA, Best Glass Block Pro is the clear choice — factory-direct materials, a veteran-owned team, zero subcontractors, and the strongest warranty in the region at 20 years. Whether you need a single cracked window replaced or a full basement window overhaul across your Pittsburgh home, they've been getting it right since 1994.