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Top-Rated Glass block pros in Alamo - Updated Nov 2026

Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.7(
42
)
Stained or Specialty Glass - Repair

Serving Alamo, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

"Throughout our project, their general construction services were consistently professional and reliable. They managed every detail flawlessly, ensuring a smooth and efficient process from start to finish."
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+1

Response time6 hrs
Recommended by17%of homeowners
Sea of Glass Studios
4.3(
40
)
Stained or Specialty Glass - Repair

Serving Alamo, CA and surrounding areas

In business since 1985

Free estimates

"I was looking to replace a custom 1920's front door wall sconce, made from leaded stained glass. Margaret and Sea of Glass was a terrific find! They meticulously restored the sconce and updated with beautiful new color of unique glass. Easy to work with and flexible. Recommend for any custom stained glass repair or project."
St. Marks Catholic Church Restored Stained Glass
St. Marks Catholic Church Restored Stained Glass
St. Marks Catholic Church Restored Stained Glass
St. Marks Catholic Church Restored Stained Glass
Private residence in Berkeley

+5

Recommended by100%of homeowners
Avatar for Five Star Windows
Five Star Windows
4.6(
179
)
Stained or Specialty Glass - Repair

Serving Alamo, CA and surrounding areas

In business since 1980

Free estimates

Credit card accepted

"I own a relatively large Eichler home. When it comes time to replace my 30+ windows and 5 sliding doors, I did my research and received more than a few quotes.

Terry was the only company that came more than 1 time, as a matter of fact, 6 times, to come, explain the materials and options, re-visit to confirm what needs to be done, etc. Five Star Windows was the only company that showed me different double pane glass with Low E, Low E2, and Low E3 coatings and demonstrated how effective each is against heat. Terry also explained the price difference and recommend the one that would be ideal for an Eichler.

I was also replacing my skylights, all twelve 2 feet by 6 feet panels. All the other companies came, did the measurements, and offer exact double pane replacements. Terri took the time, did the measurements, explain to me what type of glass will give me the the optimal heat reduction. He also explained the current codes and what is required and safest for my family. What impressed me the most was he went up the roof, came down, and went back up again and was able to identify who made the Skylight frame. Granted my house was built in the 60's, but he identified the maker of the frame and contacted the maker to inquire if a new frame is more suited for my new triple pane skylights. This passion, knowledge, and expertise is welcome and not seen from other vendors I received quotes from.

On top of all the window work, I also decided to replaced my front door to a new pre-hung door with better weather proofing and seals.

I decided to go with Five Star even though they were one of the more expensive quotes, but I also believe in "you get what you pay for", and I am glad I did.

When all the windows came, Terry and his team Glenn and Jeff inspected every piece of glass. One of the glass was of wrong measurements, and it was sent back immediately for a new one. Then there were these twelve triple pane skylight glass panels. Upon inspection, Terry did not like how the seals were done and sent all twelve panels back. I would not have known otherwise, but Five Star took the initiative and took care of me. They could have ignore the issue and avoid the hassle, and I am glad they did not.

The install was done timely and as promised. Throughout the 3 week installation process, the crew Glenn and Jeff came on time daily and cleaned up every day when they are done.

The new front door handle and lock set took 6 weeks to come, and it came in the wrong color because of my own fault. Heather from the office worked with me and re-ordered. This time around, one of the lock sets did not work, so Heather ordered another set for me. The third time around, the incorrect set was picked and shipped by the shipper, and then the forth time, the lock handle was not the correct side, and the fifth time's the charm. Throughout this process, Heather had been more than accommodating and patient with me. I was frustrated myself, but she was professional and followed though every time.

On a final note, 2 months after the install, I notice a 6 inch scratch on one of the sliding doors. I called Five Star, and they had the manufacturer come and replaced the door panel, no questions, no hassles.

I am very glad I chose Five Star, I would recommend them to any of the my friends and family. I would say it again, you get what you pay for. Five Star and the entire team certainly showed me a quality and hassle free experience."
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+34

Recommended by95%of homeowners
Avatar for SGK Home Solutions Inc
SGK Home Solutions Inc
4.5(
163
)
Stained or Specialty Glass - Repair

Serving Alamo, CA and surrounding areas

Free estimates

Credit card accepted

"SGK came out and replaced 4 of our windows earlier this year. The team was professional and helpful from the office staff down to the installers. We love our new windows and we won't hesitate to use SGK again for future projects."
Windows
Kitchen
Bathroom!
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+9

Recommended by90%of homeowners
Avatar for Dragan
Dragan
4.4(
36
)
Stained or Specialty Glass - Repair

Serving Alamo, CA and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"Excellent craftsmanship. Very reasonable price. Quote was right on target. New bathroom floor tiling. New extended glass shower enclosure with all new tiling floor to ceiling. New lighting and vanity with sink and custom fixtures."
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+32

Recommended by100%of homeowners
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Glass Block FAQs, answered by experts

Although glass block windows are made of multiple layers of thick glass, they can still break. If an individual block shatters, it can be removed and replaced, but this is a job for a window repair professional. The project is often complex and may require breaking the block further for removal. Do not attempt to handle it yourself, as the broken glass can be dangerously sharp. A professional will have the necessary tools and expertise to replace the broken glass block quickly and safely. Before hiring, confirm that the repair pro has experience with this specific type of window.

Glass block windows aren’t fire hazards; fire-rated glass block windows can increase your home’s fire safety. Modern glass blocks are made with materials that can resist high temperatures and prevent fire spread. Most offer a 45-minute fire rating, while some increase it to two hours. Compared to the typical 20 to 90 minute rating for a double-pane window, glass block can increase your home’s safety in the event of a fire.

Glass block mortar is the best choice for glass block window units. It is specifically formulated for glass block window installation. Glass block mortar is usually a mixture of Portland cement, sand, and special chemicals. It is a white mortar that is applicable inside and outside your home. Do not use regular tile mortar because it may not have the binding strength and flexibility required for glass block windows.

Glass block installation can be relatively expensive due to the range of material costs and the labor time to assemble this type of specialty window. The process proceeds slowly as the glass does not absorb moisture from mortar and silicone caulk takes longer to harden, leaving spacers to hold up the structure until the caulk or mortar begins to cure. Plus, if your current windows have structural issues or damage, you’ll need to repair them before beginning the project, increasing your bottom line. 

Their thickness depends on application, but most glass walls are typically 3/8 to 3/4 of an inch thick. Although it’s not as common, single panes of glass can also be 1 inch thick.

The Alamo, CA homeowners’ guide to glass block services

From average costs to expert advice, get all the answers you need to get your job done.