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Average homeowner rating star icon4.4
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Verified reviews icon684
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Glass block installation pros in Glenarden

VELUX America
2173 HAWKINS ST STE H
New on HomeAdvisorNew on Angi
Approved Pro
VELUX America
2173 HAWKINS ST STE H
New on AngiNew on HomeAdvisor
Approved Pro
583 local quotes requested

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.


Avatar for The Home Doctor
The Home Doctor
6066 Leesburg Pike
4.58(
139
)
Approved Pro
The Home Doctor
6066 Leesburg Pike
4.58(
139
)
Approved Pro
Customers say: Quality work
412 local quotes requested
12 years of experience

At The Home Doctor, we go beyond exterior improvements – we protect the health of your home. As a locally owned and operated business, our mission is simple: to provide you, our valued homeowner, with superior products and personalized service. Big Savings: Limited Time Only – 50% OFF Installation TERMS AND CONDITIONS: Offer valid on complete replacement projects of 10+ windows, entire roofs, or all sides of siding. Gutter, door, and attic insulation projects qualify with a minimum job cost of $7,500. Discount applies to 50% off installation costs only, which typically account for 20-30% of the total job cost, resulting in a 10-15% overall project discount. Valid for new contracts only, cannot be combined with other offers. Valid on initial visit only, and has no cash value. Residential projects only; exclusions apply. Deferred payments only valid with this promotion. The Home Doctor reserves the right to modify or cancel this promotion at any time.

"We were looking to increase our attic insulation and met The Home Doctor Company at the Capital Remodel and Garden Show in February 2025 as well as some other companies. We consulted with several companies and decided to go with The Hone Doctor for our attic insulation. The company rep, Chris Lear, was very good explaining what they would do and why our attic needed R-38 insulation. I knew we needed more but did not realize our attic was only R-13. I have worked with numerous contractors before on projects and felt this was a really good company plus they have great reviews. The installation of the attic insulation went very well. They do install siding as well but decided to put this project off for now. Would highly recommend this company."

Beverly B on March 2025

At The Home Doctor, we go beyond exterior improvements – we protect the health of your home. As a locally owned and operated business, our mission is simple: to provide you, our valued homeowner, with superior products and personalized service. Big Savings: Limited Time Only – 50% OFF Installation TERMS AND CONDITIONS: Offer valid on complete replacement projects of 10+ windows, entire roofs, or all sides of siding. Gutter, door, and attic insulation projects qualify with a minimum job cost of $7,500. Discount applies to 50% off installation costs only, which typically account for 20-30% of the total job cost, resulting in a 10-15% overall project discount. Valid for new contracts only, cannot be combined with other offers. Valid on initial visit only, and has no cash value. Residential projects only; exclusions apply. Deferred payments only valid with this promotion. The Home Doctor reserves the right to modify or cancel this promotion at any time.

"We were looking to increase our attic insulation and met The Home Doctor Company at the Capital Remodel and Garden Show in February 2025 as well as some other companies. We consulted with several companies and decided to go with The Hone Doctor for our attic insulation. The company rep, Chris Lear, was very good explaining what they would do and why our attic needed R-38 insulation. I knew we needed more but did not realize our attic was only R-13. I have worked with numerous contractors before on projects and felt this was a really good company plus they have great reviews. The installation of the attic insulation went very well. They do install siding as well but decided to put this project off for now. Would highly recommend this company."

Beverly B on March 2025


Avatar for Unicorp Home Energy Services
Unicorp Home Energy Services
4511 Knox Rd
4.88(
595
)
Approved Pro
Unicorp Home Energy Services
4511 Knox Rd
4.88(
595
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
50 local quotes requested

Since 1987 UNICORP Home Energy Services has made window, siding and roofing projects a worry free experience for over 23,000 homeowners in MD, VA and Washington D.C. We are proud of our flawless record with the Better Business Bureau because customer satisfaction is our number one priority. Our past partnerships with Price Club (Costco) and more recently Pepco Energy Services are a clear indication that we understand the importance of providing substantial savings and value on all our energy saving products. ---- At UNICORP we don't believe in hard-sell tactics, and never make cold calls that interrupt you at meal time. We understand the importance of making the right decision without headache or high pressure. That's why more customers refer us to their friends and family than any other window and siding company. Not surprising when dealing with professionals that care about their customers and love what they do. ---- We thank you for visiting our profile and look forward to improving the quality, enjoyment and energy efficiency of your home. ---- Additional phone - (703) 462-6100. Additional fax - (877) 867-3726. Award winning. Additional DBA - Vinyl Technologies Energy Service. Additional contact name- Brian Weil. Additional email - contact@unicorpmail.com.

"We hired Unicorp to change front door because of superb review on Angi, but disappointed. 1. It's a small company using subcontractors to do its work; Contrary to its claim, those subcontractors DO NOT work exclusively for Unicorp. 2. After subcontractors got paid, you will not see them again for the job. The service team seems only one person (JR). It is hard to make an appt, since he has to supervise a lot of subcontractors' work, and only do service when he is supervising near you. Specific problems: -Ghost swing after installation (i.e. door swings to close by itself). Had to request adjustment at least twice. -Fainted finish after a few years while still in warranty, but we were advised to paint ourselves. -Very thin layer of finish, and very easy to get scratch to show white underline color; -Have PROBLEM to LOCK the door. After it was "fixed", problem showed again. -Subcontractor used wood with black stains, suspect mold, to install the door; Brand new door had minor defect."

Christine c on March 2025

Since 1987 UNICORP Home Energy Services has made window, siding and roofing projects a worry free experience for over 23,000 homeowners in MD, VA and Washington D.C. We are proud of our flawless record with the Better Business Bureau because customer satisfaction is our number one priority. Our past partnerships with Price Club (Costco) and more recently Pepco Energy Services are a clear indication that we understand the importance of providing substantial savings and value on all our energy saving products. ---- At UNICORP we don't believe in hard-sell tactics, and never make cold calls that interrupt you at meal time. We understand the importance of making the right decision without headache or high pressure. That's why more customers refer us to their friends and family than any other window and siding company. Not surprising when dealing with professionals that care about their customers and love what they do. ---- We thank you for visiting our profile and look forward to improving the quality, enjoyment and energy efficiency of your home. ---- Additional phone - (703) 462-6100. Additional fax - (877) 867-3726. Award winning. Additional DBA - Vinyl Technologies Energy Service. Additional contact name- Brian Weil. Additional email - contact@unicorpmail.com.

"We hired Unicorp to change front door because of superb review on Angi, but disappointed. 1. It's a small company using subcontractors to do its work; Contrary to its claim, those subcontractors DO NOT work exclusively for Unicorp. 2. After subcontractors got paid, you will not see them again for the job. The service team seems only one person (JR). It is hard to make an appt, since he has to supervise a lot of subcontractors' work, and only do service when he is supervising near you. Specific problems: -Ghost swing after installation (i.e. door swings to close by itself). Had to request adjustment at least twice. -Fainted finish after a few years while still in warranty, but we were advised to paint ourselves. -Very thin layer of finish, and very easy to get scratch to show white underline color; -Have PROBLEM to LOCK the door. After it was "fixed", problem showed again. -Subcontractor used wood with black stains, suspect mold, to install the door; Brand new door had minor defect."

Christine c on March 2025


Avatar for Peak Custom Remodeling Corporation
Peak Custom Remodeling Corporation
300 Red Brook Boulevard
4.75(
122
)
Approved Pro
Peak Custom Remodeling Corporation
300 Red Brook Boulevard
4.75(
122
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
390 local quotes requested

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.

"Stephen was very Professional and Knowledgeable. He made the the experience very enjoyable. Looking forward to do my business with him and Peak Custom Remolding."

Charles S on February 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.

"Stephen was very Professional and Knowledgeable. He made the the experience very enjoyable. Looking forward to do my business with him and Peak Custom Remolding."

Charles S on February 2025


Avatar for Presidential Exteriors LLC
Presidential Exteriors LLC
2301 Research Blvd
4.71(
153
)
Approved Pro
Presidential Exteriors LLC
2301 Research Blvd
4.71(
153
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
175 local quotes requested

Licensed in MD, DC and VA, Presidential Exteriors is your one stop solution for any exterior remodeling needs. Our award winning products and experienced installers will ensure that your home is a Presidential Home. We look forward to showing you how our customer centric approach and commitment to communication guarantees satisfaction the first time, every time.

"Our review is based on the purchase (part 1) for replacing siding for both side of our home. Jacob L. was very professional, on time, and honest. He knows what he is selling. We learned a lot about our home during his presentation. Before we bought our home we paid for a professional home inspection. We thought our house inspector was very good but he did miss something---the siding on the sides of our home was installed extremely bad. Jacob pointed out so much that we just didn't know and should have be caught during our home inpection. Thanks Jacob!!"

Mearen B on March 2025

Licensed in MD, DC and VA, Presidential Exteriors is your one stop solution for any exterior remodeling needs. Our award winning products and experienced installers will ensure that your home is a Presidential Home. We look forward to showing you how our customer centric approach and commitment to communication guarantees satisfaction the first time, every time.

"Our review is based on the purchase (part 1) for replacing siding for both side of our home. Jacob L. was very professional, on time, and honest. He knows what he is selling. We learned a lot about our home during his presentation. Before we bought our home we paid for a professional home inspection. We thought our house inspector was very good but he did miss something---the siding on the sides of our home was installed extremely bad. Jacob pointed out so much that we just didn't know and should have be caught during our home inpection. Thanks Jacob!!"

Mearen B on March 2025


Avatar for Marshall Roofing Siding and Windows
Marshall Roofing Siding and Windows
7220 Telegraph Square Dr
4.74(
890
)
Approved Pro
Marshall Roofing Siding and Windows
7220 Telegraph Square Dr
4.74(
890
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
51 local quotes requested

Mar­shall Roof­ing, Siding & Windows is a top roofing, sid­ing, win­dows, and gut­ters com­pany based in North­ern Vir­ginia. Throughout the years providing the highest level of cus­tomer ser­vice and 100% home­owner sat­is­fac­tion has been the pin­na­cle principle at Mar­shall Roof­ing Sid­ing & Win­dows. The belief that each and every home­owner deserves to receive good value for their money is the driving concept on the functions of the company. **Popular Returning Spring Promotion Coming Soon** (Inquire for additional details)

"We had Marshall Roofing do an extensive replacement of our 40 year old house exterior. They replaced aluminum siding, soffits and fascia, plastic window trim and door wood trim with Hardie Plank products. In addition, they installed a new roof and gutters. Their work was impressive-they provided an accurate and comprehensive cost proposal, detailed schedule for product delivery and installation and completed the work as planned. The house looks great and should not require further exterior maintenance for years. Their cost was competitive with other proposals, but their responsiveness to our initial inquiry, thorough pre-proposal inspection and recommendations convinced us to chose them. Strong recommendation."

William H on February 2020

Mar­shall Roof­ing, Siding & Windows is a top roofing, sid­ing, win­dows, and gut­ters com­pany based in North­ern Vir­ginia. Throughout the years providing the highest level of cus­tomer ser­vice and 100% home­owner sat­is­fac­tion has been the pin­na­cle principle at Mar­shall Roof­ing Sid­ing & Win­dows. The belief that each and every home­owner deserves to receive good value for their money is the driving concept on the functions of the company. **Popular Returning Spring Promotion Coming Soon** (Inquire for additional details)

"We had Marshall Roofing do an extensive replacement of our 40 year old house exterior. They replaced aluminum siding, soffits and fascia, plastic window trim and door wood trim with Hardie Plank products. In addition, they installed a new roof and gutters. Their work was impressive-they provided an accurate and comprehensive cost proposal, detailed schedule for product delivery and installation and completed the work as planned. The house looks great and should not require further exterior maintenance for years. Their cost was competitive with other proposals, but their responsiveness to our initial inquiry, thorough pre-proposal inspection and recommendations convinced us to chose them. Strong recommendation."

William H on February 2020


Avatar for Roofing Pups, Roofing & Siding - MD
Roofing Pups, Roofing & Siding - MD
7855 Belair Rd
4.56(
43
)
Approved Pro
Roofing Pups, Roofing & Siding - MD
7855 Belair Rd
4.56(
43
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
328 local quotes requested

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.

"This company should be ashamed. I asked for a quote to have my skirting replaced on a mobile home. Other quotes I received were between $1,100 and $1,300. This company rep quoted me $8400.!! He thought he was dealing with an uninformed senior and I believe this was a clear case of elder abuse and a scam."

Judith D on June 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.

"This company should be ashamed. I asked for a quote to have my skirting replaced on a mobile home. Other quotes I received were between $1,100 and $1,300. This company rep quoted me $8400.!! He thought he was dealing with an uninformed senior and I believe this was a clear case of elder abuse and a scam."

Judith D on June 2024


Avatar for Window Nation Baltimore
Window Nation Baltimore
871 Cromwell Park Dr
4.50(
747
)
Approved Pro
Window Nation Baltimore
871 Cromwell Park Dr
4.50(
747
)
Approved Pro
Customers say: Quality work
97 local quotes requested
19 years of experience

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


Avatar for American Windows & Siding
American Windows & Siding
10516 Detrick Ave
4.72(
127
)
Approved Pro
American Windows & Siding
10516 Detrick Ave
4.72(
127
)
Approved Pro
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
62 local quotes requested

American Windows & Siding of VA, Inc., specializes in custom windows, siding, doors, and roof systems. We use the finest quality products and labor available, and all our work is guaranteed for your peace of mind. Owner operated and employee owned, the company was established in 1991. We have two locations for your convenience - one in Fairfax, Virginia and one in Kensington, Maryland. We’ve been a member of the Better Business Bureau since 1993, and our customer service and proven track record of thousands of satisfied customers have earned us the reputation of an industry leader. All our workers are licensed, bonded, and insured. We have been top rated for the last eleven years in Washington Checkbook Magazine, a leading consumer publication for the DC metro area. In March of 2011 we were recognized as one of the "The Top 200 Remodelers" by Washingtonian Magazine and we have an "A" rating on Angie's List, receiving their Super Service Award for the past two years. With more than 13,000 jobs successfully completed in Northern Virginia, DC and suburban Maryland, we are proud of our reputation. Take a look at what our customers have to say. LICENSE # 49774.

"Had windows and doors installed by this company. The window installation went great. The bad news is that they do not seem competent at installing door hardware. My door has not latched properly since they made some unwanted modifications to the hardware (it worked perfectly before they started modifying it).have had them out three separate times to fix the issue they caused with the door latch and lock. Every “fix” they do seems to make the problem worse. I would steer clear of this company for door installations."

Christian S on April 2025

American Windows & Siding of VA, Inc., specializes in custom windows, siding, doors, and roof systems. We use the finest quality products and labor available, and all our work is guaranteed for your peace of mind. Owner operated and employee owned, the company was established in 1991. We have two locations for your convenience - one in Fairfax, Virginia and one in Kensington, Maryland. We’ve been a member of the Better Business Bureau since 1993, and our customer service and proven track record of thousands of satisfied customers have earned us the reputation of an industry leader. All our workers are licensed, bonded, and insured. We have been top rated for the last eleven years in Washington Checkbook Magazine, a leading consumer publication for the DC metro area. In March of 2011 we were recognized as one of the "The Top 200 Remodelers" by Washingtonian Magazine and we have an "A" rating on Angie's List, receiving their Super Service Award for the past two years. With more than 13,000 jobs successfully completed in Northern Virginia, DC and suburban Maryland, we are proud of our reputation. Take a look at what our customers have to say. LICENSE # 49774.

"Had windows and doors installed by this company. The window installation went great. The bad news is that they do not seem competent at installing door hardware. My door has not latched properly since they made some unwanted modifications to the hardware (it worked perfectly before they started modifying it).have had them out three separate times to fix the issue they caused with the door latch and lock. Every “fix” they do seems to make the problem worse. I would steer clear of this company for door installations."

Christian S on April 2025


Avatar for Calderas Construction INC
Calderas Construction INC
5.00(
7
)
Approved Pro
Calderas Construction INC
5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

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

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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

The homeowners guide to glass block window services
From average costs to expert advice, get all the answers you need to get your job done.
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