Get matched with top glass block installation pros in Rockville, MD
There are 4 highly-rated local glass block installation pros.
TRUSTED BY HOMEOWNERS
4.4 
827 Verified Reviews for Glass Block Window Service pros in Rockville, MD
*The Angi rating for Glass Block Window Service companies in Rockville, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Glass Block Window Service needs.
*The HomeAdvisor rating for Glass Block Window Service companies in Rockville, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Glass Block Window Service needs.
Last update on May 06, 2025
Glass block installation pros in Rockville
We are a family owned and operated company since 1986. .We are a client based company,hassle free no sales pressure or gimmicks with our presentations.we offer one of the best warranties in the market .We have our own crews to guarantee great installations every time.We offer premier energy efficient vinyl windows and vinyl siding.
"Great excellent work"
Michael W on April 2025
We are a family owned and operated company since 1986. .We are a client based company,hassle free no sales pressure or gimmicks with our presentations.we offer one of the best warranties in the market .We have our own crews to guarantee great installations every time.We offer premier energy efficient vinyl windows and vinyl siding.
"Great excellent work"
Michael W on April 2025
12+ years of experience! We guarantee your satisfaction, and we won’t leave until the job is done right. Our team has quality experience in this industry, and we make sure our customers are happy before we leave. Call or click to schedule an estimate today!
"It went very well.They showed up on time, were very transparent in all transactions, reasonable price, and customer friendly.I will recommend this service to anyone.Very pleased"
Kimeng K on April 2024
12+ years of experience! We guarantee your satisfaction, and we won’t leave until the job is done right. Our team has quality experience in this industry, and we make sure our customers are happy before we leave. Call or click to schedule an estimate today!
"It went very well.They showed up on time, were very transparent in all transactions, reasonable price, and customer friendly.I will recommend this service to anyone.Very pleased"
Kimeng K on April 2024
At Zen Windows, we think that finding replacement windows, sliding doors and entry doors for your home should be a simple, pleasant experience. Our team works closely with you via e-mail and phone to help shape the improvements you envision without ever having a salesperson visit your home. We offer award-winning, energy-efficient windows and doors, and provide a lifetime transferable product and installation warranty. Zen Windows sets our clients at ease with our No Down Payment Policy. You won't pay a penny until the job is completed. Simple, easy, stress-free...the way it should be.
"This is the second time that we hired Zen Windows for a project, and we could not be more pleased with the service, professionalism and the results on both occasions. They are very responsive, helped us identify the right products and made the entire process as stress-free as possible. Replacing windows and doors is a big project, and having a company you can trust will do it right makes all the difference. Scott and his team are great to work with!"
Andrew G on May 2025
At Zen Windows, we think that finding replacement windows, sliding doors and entry doors for your home should be a simple, pleasant experience. Our team works closely with you via e-mail and phone to help shape the improvements you envision without ever having a salesperson visit your home. We offer award-winning, energy-efficient windows and doors, and provide a lifetime transferable product and installation warranty. Zen Windows sets our clients at ease with our No Down Payment Policy. You won't pay a penny until the job is completed. Simple, easy, stress-free...the way it should be.
"This is the second time that we hired Zen Windows for a project, and we could not be more pleased with the service, professionalism and the results on both occasions. They are very responsive, helped us identify the right products and made the entire process as stress-free as possible. Replacing windows and doors is a big project, and having a company you can trust will do it right makes all the difference. Scott and his team are great to work with!"
Andrew G on May 2025
At Window Nation, we know replacement windows. We’re third-generation window replacement experts who have been lucky to provide homeowners replacement windows, siding, and doors for over fifteen years. We opened our first showroom in Maryland in 2006, quickly growing to serve homeowners in cities across the country – and we’re not stopping there. We’re grateful for every homeowner who has trusted us to upgrade their most important asset: their home. We’ve learned a lot about home improvement over the years, but the most important thing we learned isn’t about window replacement. We learned the home improvement industry isn’t about offering the best windows, siding and doors; it’s about the relationships we build with our customers.
"Love our new Grand View Windows from Window Nation 17 Windows and 1 Sliding Glass Door We did quite a bit of research, explored a lot of companies and choose Window Nation for our project. And we are happy we did. The whole process from presentation to installation was easy and efficient. Reza arrived at our house on time for the presentation. He inspected and measured our windows and then launched into the presentation. Reza is knowledgeable about the Window Nation offering as well as the products offered by his competitors. As mentioned, I did some research and had an idea of the features that we wanted and what we should pay. Reza presented the Window Nation Grand View line, which meets our feature requirements, and after a bit of back-and-forth negotiation we settled on a price that was within our range and fair to us both. After signing, Reza described the next steps and set expectations. Overall, the presentation took only about an hour and was relatively painless, with no high-pressure tactics. Several days later, Mike came by to inspect our windows and confirm measurements for the build specifications. This took only about a half-hour. Mike answered some questions about the installation process and said that the windows and door could take up to 6 weeks to build. Imagine our surprise when we received a call a week later to schedule our installation. On installation day, the three-man team arrived on time. They introduced themselves and the team lead, Ted, described the process and then they got right to work. They tarped the paths to all the windows to protect the floors. They were very careful and respectful of our house. The entire team was friendly and polite and experienced and highly skilled. You could tell that they’d done this a time or two. The outside trim work is fantastic and the inside finish work is great. All 17 windows and the sliding door were installed in a single day. Ted went over the operation of the windows and door. The windows and door look and function great. We couldn’t be happier. If you are considering a window or door replacement project, we strongly recommend that you engage Window Nation. They will treat you right."
Richard M on April 2025
At Window Nation, we know replacement windows. We’re third-generation window replacement experts who have been lucky to provide homeowners replacement windows, siding, and doors for over fifteen years. We opened our first showroom in Maryland in 2006, quickly growing to serve homeowners in cities across the country – and we’re not stopping there. We’re grateful for every homeowner who has trusted us to upgrade their most important asset: their home. We’ve learned a lot about home improvement over the years, but the most important thing we learned isn’t about window replacement. We learned the home improvement industry isn’t about offering the best windows, siding and doors; it’s about the relationships we build with our customers.
"Love our new Grand View Windows from Window Nation 17 Windows and 1 Sliding Glass Door We did quite a bit of research, explored a lot of companies and choose Window Nation for our project. And we are happy we did. The whole process from presentation to installation was easy and efficient. Reza arrived at our house on time for the presentation. He inspected and measured our windows and then launched into the presentation. Reza is knowledgeable about the Window Nation offering as well as the products offered by his competitors. As mentioned, I did some research and had an idea of the features that we wanted and what we should pay. Reza presented the Window Nation Grand View line, which meets our feature requirements, and after a bit of back-and-forth negotiation we settled on a price that was within our range and fair to us both. After signing, Reza described the next steps and set expectations. Overall, the presentation took only about an hour and was relatively painless, with no high-pressure tactics. Several days later, Mike came by to inspect our windows and confirm measurements for the build specifications. This took only about a half-hour. Mike answered some questions about the installation process and said that the windows and door could take up to 6 weeks to build. Imagine our surprise when we received a call a week later to schedule our installation. On installation day, the three-man team arrived on time. They introduced themselves and the team lead, Ted, described the process and then they got right to work. They tarped the paths to all the windows to protect the floors. They were very careful and respectful of our house. The entire team was friendly and polite and experienced and highly skilled. You could tell that they’d done this a time or two. The outside trim work is fantastic and the inside finish work is great. All 17 windows and the sliding door were installed in a single day. Ted went over the operation of the windows and door. The windows and door look and function great. We couldn’t be happier. If you are considering a window or door replacement project, we strongly recommend that you engage Window Nation. They will treat you right."
Richard M on April 2025
Start with skylights! At VELUX, our mission is clear: we're dedicated to transforming your space with natural light and fresh air with skylights. Whether you're looking to replace old skylights or install brand-new ones, we will guide you every step of the way. Why Choose VELUX? =================== When it comes to skylights and roof windows, VELUX is the global leader. Here's why you should trust us to transform your home: 1. Innovation and Quality: VELUX skylights are renowned for their innovation and unmatched quality. They're designed to let in abundant natural light while keeping your space leak-free and energy-efficient. 2. Huge Product Selection: You’ll have access to a wide range of skylight options, from fixed to vented skylights. And we are here to help tailor the selection to suit your specific needs and style preferences. 3. Expertise: We take pride in what we do at VELUX, and our team is highly trained to guide you through the entire process. From selecting the perfect product for your space to providing valuable recommendations, we're committed to making sure your skylight project is a complete success. 4. Professional Installation Partners: We don't stop at product selection and recommendations; we also match you with a VELUX-trained installer who will handle the installation of your skylights with precision and expertise.
Start with skylights! At VELUX, our mission is clear: we're dedicated to transforming your space with natural light and fresh air with skylights. Whether you're looking to replace old skylights or install brand-new ones, we will guide you every step of the way. Why Choose VELUX? =================== When it comes to skylights and roof windows, VELUX is the global leader. Here's why you should trust us to transform your home: 1. Innovation and Quality: VELUX skylights are renowned for their innovation and unmatched quality. They're designed to let in abundant natural light while keeping your space leak-free and energy-efficient. 2. Huge Product Selection: You’ll have access to a wide range of skylight options, from fixed to vented skylights. And we are here to help tailor the selection to suit your specific needs and style preferences. 3. Expertise: We take pride in what we do at VELUX, and our team is highly trained to guide you through the entire process. From selecting the perfect product for your space to providing valuable recommendations, we're committed to making sure your skylight project is a complete success. 4. Professional Installation Partners: We don't stop at product selection and recommendations; we also match you with a VELUX-trained installer who will handle the installation of your skylights with precision and expertise.
Why choose ROI Construction? Our Gold Standard guarantee is 100% customer satisfaction, 100% of the time! - It's that simple. No need to keep looking for “Contractor near me,” we are the top local Maryland and DC family owned Exterior company (est. 1974) that delivers the best results and a positive return on investment in the area! ROI also does a final walkthrough of every-single-job to ensure that we deliver a superior finished product for every ROI customer!
"While I appreciate the company's attempt to rectify initial issues, our overall experience with this solar installation was unfortunately very unprofessional. The initial installation team demonstrated a lack of respect for our property, damaging plants, leaving debris (including an orange cone), and inappropriately using our private bathroom despite a readily available public restroom on the premises. Following my initial negative review, the company offered a Home Depot gift card as compensation, which wasn't particularly useful to us. They also offered to address some unrelated roof repairs they noticed, but I questioned why these weren't addressed during the original solar installation. Scheduling follow-up work proved equally frustrating. An appointment was scheduled for Wednesday, but the crew arrived a day early on Tuesday without prior communication. While I appreciated them attempting to complete the work ahead of schedule, they left the roof partially finished overnight, exposed to potential weather damage. Furthermore, the crew damaged another plant box during the Tuesday work and continued noisy work – including banging on the roof – until 8:30 PM on Wednesday, violating DC noise ordinances that typically require work to conclude by 7:30 PM. This put us at risk of a city violation. Throughout the entire process, communication was poor and the lack of consideration for our property and local regulations was deeply concerning. While I appreciate the attempt to make things right, the experience was ultimately not ideal and left us feeling very dissatisfied."
Jason M on April 2025
Why choose ROI Construction? Our Gold Standard guarantee is 100% customer satisfaction, 100% of the time! - It's that simple. No need to keep looking for “Contractor near me,” we are the top local Maryland and DC family owned Exterior company (est. 1974) that delivers the best results and a positive return on investment in the area! ROI also does a final walkthrough of every-single-job to ensure that we deliver a superior finished product for every ROI customer!
"While I appreciate the company's attempt to rectify initial issues, our overall experience with this solar installation was unfortunately very unprofessional. The initial installation team demonstrated a lack of respect for our property, damaging plants, leaving debris (including an orange cone), and inappropriately using our private bathroom despite a readily available public restroom on the premises. Following my initial negative review, the company offered a Home Depot gift card as compensation, which wasn't particularly useful to us. They also offered to address some unrelated roof repairs they noticed, but I questioned why these weren't addressed during the original solar installation. Scheduling follow-up work proved equally frustrating. An appointment was scheduled for Wednesday, but the crew arrived a day early on Tuesday without prior communication. While I appreciated them attempting to complete the work ahead of schedule, they left the roof partially finished overnight, exposed to potential weather damage. Furthermore, the crew damaged another plant box during the Tuesday work and continued noisy work – including banging on the roof – until 8:30 PM on Wednesday, violating DC noise ordinances that typically require work to conclude by 7:30 PM. This put us at risk of a city violation. Throughout the entire process, communication was poor and the lack of consideration for our property and local regulations was deeply concerning. While I appreciate the attempt to make things right, the experience was ultimately not ideal and left us feeling very dissatisfied."
Jason M on April 2025
Simply put - we believe that improving your home should be enjoyable. That is why we spent years designing our consultations, installations, and customer care experiences to minimize stress and provide every client with a fair and honest home improvement experience. Founded in 2005, Windows on Washington has become one of the area’s most respected home improvement companies because we make our clients' homes more beautiful, comfortable, and energy efficient. We are proud Angie’s Super Service Award winners, which we’ve now earned for seven consecutive years. We have an A+ rating with the Better Business Bureau and have never had one filed complaint. In addition, we have hundreds of positive customer reviews on Angie’s List, Customer Lobby, Home Advisor, Guild Quality, Houzz, and Yelp.
"We were very pleased with the work done by Windows On Washington for our insulation project. They were very friendly and did a great job of communicating with us throughout the project. The estimator Shayne was very helpful in providing us and explaining several options for our insulation needs. And the installation team did quality work with attention to detail. Brian, Anthony and Rubin were very willing to explain any details to us as they performed the work and went the extra mile to ensure we were happy with the end result. We recommend them highly"
Cristl P on April 2025
Simply put - we believe that improving your home should be enjoyable. That is why we spent years designing our consultations, installations, and customer care experiences to minimize stress and provide every client with a fair and honest home improvement experience. Founded in 2005, Windows on Washington has become one of the area’s most respected home improvement companies because we make our clients' homes more beautiful, comfortable, and energy efficient. We are proud Angie’s Super Service Award winners, which we’ve now earned for seven consecutive years. We have an A+ rating with the Better Business Bureau and have never had one filed complaint. In addition, we have hundreds of positive customer reviews on Angie’s List, Customer Lobby, Home Advisor, Guild Quality, Houzz, and Yelp.
"We were very pleased with the work done by Windows On Washington for our insulation project. They were very friendly and did a great job of communicating with us throughout the project. The estimator Shayne was very helpful in providing us and explaining several options for our insulation needs. And the installation team did quality work with attention to detail. Brian, Anthony and Rubin were very willing to explain any details to us as they performed the work and went the extra mile to ensure we were happy with the end result. We recommend them highly"
Cristl P on April 2025
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We are the only company in Maryland offering the “Forever Guarantee” - A guarantee of our workmanship for as long as both you AND the next owner own the home. Unlike other companies we don’t just TELL you something will look good - we SHOW you. We provide full color 3-D renderings of all of our products to show what they will look like on your home PRIOR to you making any decisions or signing a contract. We do this for free the first time we come out as part of our free estimate & design consultation. If you decide to move forward, you don’t have to pay a single dollar until the job is complete and you are satisfied. With the Forever Guarantee, full color 3-D designs before you make a decision, and no payments until the job is complete - our goal is COMPLETE peace of mind for all our customers. We then follow this up with top notch communication, customer service, skill, and quality for Maryland’s leading exterior replacement experience.
"We met with Ryan and Pete who were both extremely professional and knowledgeable. They met with my husband and I discuss new windows for the main floor of our single family home. We have a toddler and newborn and Ryan helped keep our toddler occupied and was very understanding and patient as we had to multitask in taking care of our kids while also discussing the window project. We were impressed by their warm, genuine approach which is very different from a typical salesperson trying to get you to go with their product. You could tell they truly believed in the company, the goals and values, and the product/services they provide. Due to personal reasons we weren’t able to invest in the project right now but we will 100% be contacting Ryan in the future and using Peak for all our future window/roofing needs. When you find a good, reliable company like Peak you want to make sure to spread the word and we will be recommending them to our family/friends/neighbors who need any projects done in their homes."
Nicole L on May 2025
We are the only company in Maryland offering the “Forever Guarantee” - A guarantee of our workmanship for as long as both you AND the next owner own the home. Unlike other companies we don’t just TELL you something will look good - we SHOW you. We provide full color 3-D renderings of all of our products to show what they will look like on your home PRIOR to you making any decisions or signing a contract. We do this for free the first time we come out as part of our free estimate & design consultation. If you decide to move forward, you don’t have to pay a single dollar until the job is complete and you are satisfied. With the Forever Guarantee, full color 3-D designs before you make a decision, and no payments until the job is complete - our goal is COMPLETE peace of mind for all our customers. We then follow this up with top notch communication, customer service, skill, and quality for Maryland’s leading exterior replacement experience.
"We met with Ryan and Pete who were both extremely professional and knowledgeable. They met with my husband and I discuss new windows for the main floor of our single family home. We have a toddler and newborn and Ryan helped keep our toddler occupied and was very understanding and patient as we had to multitask in taking care of our kids while also discussing the window project. We were impressed by their warm, genuine approach which is very different from a typical salesperson trying to get you to go with their product. You could tell they truly believed in the company, the goals and values, and the product/services they provide. Due to personal reasons we weren’t able to invest in the project right now but we will 100% be contacting Ryan in the future and using Peak for all our future window/roofing needs. When you find a good, reliable company like Peak you want to make sure to spread the word and we will be recommending them to our family/friends/neighbors who need any projects done in their homes."
Nicole L on May 2025
At Window Nation, we know replacement windows. We’re third-generation window replacement experts who have been lucky to provide homeowners replacement windows, siding, and doors for over fifteen years. We opened our first showroom in Maryland in 2006, quickly growing to serve homeowners in cities across the country – and we’re not stopping there. We’re grateful for every homeowner who has trusted us to upgrade their most important asset: their home. We’ve learned a lot about home improvement over the years, but the most important thing we learned isn’t about window replacement. We learned the home improvement industry isn’t about offering the best windows, siding and doors; it’s about the relationships we build with our customers.
"The salesman was late. The person taking measurements missed a window rushing before his vacation. Which in turn delayed our project 2 weeks. The installers damaged our new porch and installed 5 defective windows. We have had 0 updates on how our windows and home will he repaired but we have received numerous. Text, emails, and posted mail begging for 5 stars including a gift card as a thanks. It has now been over 5 months and we still have windows that need to be replaced and Window Nation has fraudulently told the finance department the job is complete so we now need to pay for a job that is not completed. Avoid this company if possible."
Emily R on November 2024
At Window Nation, we know replacement windows. We’re third-generation window replacement experts who have been lucky to provide homeowners replacement windows, siding, and doors for over fifteen years. We opened our first showroom in Maryland in 2006, quickly growing to serve homeowners in cities across the country – and we’re not stopping there. We’re grateful for every homeowner who has trusted us to upgrade their most important asset: their home. We’ve learned a lot about home improvement over the years, but the most important thing we learned isn’t about window replacement. We learned the home improvement industry isn’t about offering the best windows, siding and doors; it’s about the relationships we build with our customers.
"The salesman was late. The person taking measurements missed a window rushing before his vacation. Which in turn delayed our project 2 weeks. The installers damaged our new porch and installed 5 defective windows. We have had 0 updates on how our windows and home will he repaired but we have received numerous. Text, emails, and posted mail begging for 5 stars including a gift card as a thanks. It has now been over 5 months and we still have windows that need to be replaced and Window Nation has fraudulently told the finance department the job is complete so we now need to pay for a job that is not completed. Avoid this company if possible."
Emily R on November 2024
Since 1992, Roofing Pups, Roofing & Siding - MD has provided homeowners and business owners with top quality, factory-direct products, professionally installed by licensed, bonded installers with over 25 years of home improvement experience. Our experience sales representative will assist you with the windows and/or doors that suit you best. Roofing Pups Roofing & Siding takes pride in building relationships with not only our consumers but with our manufacturers as well. We have maintained a reputable business relationship with both of our leading manufactures, American Jewel and Home Guard, for 15 years. Being a locally owned and operated company, Roofing Pups is able to provide you with top quality products with a bottom line price! Come see for yourself how Air Tite Windows & Doors, Inc. can make your home look stunning and more energy efficient.
"Great.good job"
linwood c on May 2025
Since 1992, Roofing Pups, Roofing & Siding - MD has provided homeowners and business owners with top quality, factory-direct products, professionally installed by licensed, bonded installers with over 25 years of home improvement experience. Our experience sales representative will assist you with the windows and/or doors that suit you best. Roofing Pups Roofing & Siding takes pride in building relationships with not only our consumers but with our manufacturers as well. We have maintained a reputable business relationship with both of our leading manufactures, American Jewel and Home Guard, for 15 years. Being a locally owned and operated company, Roofing Pups is able to provide you with top quality products with a bottom line price! Come see for yourself how Air Tite Windows & Doors, Inc. can make your home look stunning and more energy efficient.
"Great.good job"
linwood c on May 2025
Glass block window services FAQs
If you have a problem with your window, such as broken glass, minor leaks, or a problem with your window being stuck, repairing the broken part might be a cheaper option than replacing the entire window. However, if you have a deteriorating window frame or major leaks, buying a new window will be the better long-term solution.
Installing glass block windows has benefits and disadvantages, as with most materials. The pros and cons can vary depending on the type of glass block and the window location.
Pros
Maintains privacy while letting light into the bathroom
Energy efficient
Sealed to prevent drafts
Aesthetically pleasing
Strong and secure
Cons
Costly to install
Challenging installation
Challenging repair
Window replacement costs between $180 and $410 per window, or an average of $280 per window. However, your specific replacement job could cost as little as $100 or as much as $750. Factors such as frame material, the number of windows you need, and the type of glass you order all impact the overall cost. For example, simple double-glazed windows will cost $3 to $6 per square foot, but the stronger tempered glass ranges from $12 to $14 per square foot.
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.
The average cost to install glass block windows is about $710, ranging from $460 to $1,000, depending on the size and design of the window, installation type, and location. Different styles of glass blocks also impact the cost:
Clear glass blocks: $10–$30 per block
Colored glass blocks: $25–$40 per block
Acrylic glass blocks: $15–$25 per block
Wavy glass blocks: $10–$30 per block
Alpha glass blocks: $15–$25 per block
Ice glass blocks: $20–$35 per block
Diamond glass blocks: $20–$75 per block
Frosted glass blocks: $30–$35 per block
- Travilha
- North Bethesda
- Washington Grove
- Redland
- North Potomac
- Derwood
- Potomac
- Garrett Park
- Aspen Hill
- Gaithersburg
- Montgomery Village
- Darnestown
- Kensington
- Olney
- Wheaton
- Glenmont
- Bethesda
- Cabin John
- Silver Spring
- Germantown
- Glen Echo
- Forest Glenn
- Chevy Chase
- Kemp Mill
- Somerset
- Sandy Spring
- Great Falls
- Colesville
- White Oak
- Mclean
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