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Verified Reviews for Glass Block Window Service pros in Cortland, IL
*The Angi rating for Glass Block Window Service companies in Cortland, IL 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 Cortland, IL 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 December 15, 2025
Find Glass block installation pros in Cortland

Windo-Well Cover Company
Windo-Well Cover Company
Windo-Well Cover Company, is committed to providing the highest form of customer service and customer satisfaction in the custom made window well cover industry. Please call for your personal consultation.
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Phyllis L on December 2019
Windo-Well Cover Company, is committed to providing the highest form of customer service and customer satisfaction in the custom made window well cover industry. Please call for your personal consultation.
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Phyllis L on December 2019

Window Concepts
Window Concepts
Since 1982, Window Concepts has been helping homeowners make their houses more beautiful, comfortable, and energy-efficient. Led by Brian Murphy, our family-owned company is built on trust, quality, and customer care. From the very first conversation to the final installation, our friendly team is with you every step of the way — helping you choose the best windows, doors, siding, or roofing for your home and budget. We take pride in our attention to detail, cleanliness, and top-notch service, treating your home like it’s our own. With over 40 years of experience, we continue to offer the latest products and technology to keep your home looking its best — and performing at its best — for years to come.
"Our home is 85 years old and was in need of extensive renovations. We chose Window Concepts for our windows, roofing, and siding, and they did an outstanding job! Garrett provided a wide range of samples and made the entire process smooth and convenient. My wife and I highly recommend this family-owned company—they truly stand out! Their customer service is also exceptional and very accessible; 10/10 experience!"
Sean G on November 2024
Since 1982, Window Concepts has been helping homeowners make their houses more beautiful, comfortable, and energy-efficient. Led by Brian Murphy, our family-owned company is built on trust, quality, and customer care. From the very first conversation to the final installation, our friendly team is with you every step of the way — helping you choose the best windows, doors, siding, or roofing for your home and budget. We take pride in our attention to detail, cleanliness, and top-notch service, treating your home like it’s our own. With over 40 years of experience, we continue to offer the latest products and technology to keep your home looking its best — and performing at its best — for years to come.
"Our home is 85 years old and was in need of extensive renovations. We chose Window Concepts for our windows, roofing, and siding, and they did an outstanding job! Garrett provided a wide range of samples and made the entire process smooth and convenient. My wife and I highly recommend this family-owned company—they truly stand out! Their customer service is also exceptional and very accessible; 10/10 experience!"
Sean G on November 2024

J&K Home Improvement & Restoration
J&K Home Improvement & Restoration
Founded in 1996, J & K has held quality workmanship at its core from the very beginning. We started as a exterior restoration company with 5 employees. We were small, but we knew that if we worked hard and stayed true to our quality we would be successful in the long run. In 2005, responding to huge demand, we started working as a General Contractor. The dedication to quality, strong work ethic and great customer service continued to be our hallmark. Over the years we have grown and learned to never forget the ethics that have guided us. Today we find the marketplace more competitive than ever before. The rapidly rising cost of materials, fuel and labor make surviving in our industry more and more difficult. Unfortunately the result is a high failure rate of businesses in our market. J & K Home Improvement offers the highest quality materials available and backs our workmanship with a ten year limited warranty.
"Simply put, you will NOT find a better, more honest, more helpful, more easy-to-work-with, reasonably priced contractor than John Lee and his crew at J & K Home Improvement & Restoration! We had a "complicated" set of circumstances when our home was damaged by a storm, last winter. The insurance company sent out an estimator to assess the damage and, after the company recommended J & K Home Improvement & Restoration, I was introduced to John Lee. I eventually learned that John also does estimates for a variety of insurance companies (because his company is so well regarded), and he patiently listened as I described the nuances associated with our house. During our initial consultation, he was able to clearly describe all of the steps that would be necessary and answer all of our questions. Long story short, not only was John able to address EVERY single concern and request that we had regarding the eventual repairs to the house (including roof, siding, and a window upgrade that would have cost much more if we had done it at a later time), but he spent plenty of extra time making sure that everything we had talked about was addressed to our 100% satisfaction! He was also able to persuade the insurance company to cover more complete repairs than was originally specified by the first adjuster! In addition, when we had an electrical "hiccup" associated with all the pounding on the walls, John quickly sent an expert electrician to locate and correct the problem. He absolutely could have passed those charges on to us because the failure wasn't due to any mistake on the part of his crew but, instead, he picked up the unanticipated expense himself. It was truly a pleasure to work with John! He made a difficult situation as easy to manage as possible, and we would strongly recommend J & K Home Improvement & Restoration to anyone who wants to hire a quality contractor that stands behind their work and well-earned reputation!"
Stephen B on December 2022
Founded in 1996, J & K has held quality workmanship at its core from the very beginning. We started as a exterior restoration company with 5 employees. We were small, but we knew that if we worked hard and stayed true to our quality we would be successful in the long run. In 2005, responding to huge demand, we started working as a General Contractor. The dedication to quality, strong work ethic and great customer service continued to be our hallmark. Over the years we have grown and learned to never forget the ethics that have guided us. Today we find the marketplace more competitive than ever before. The rapidly rising cost of materials, fuel and labor make surviving in our industry more and more difficult. Unfortunately the result is a high failure rate of businesses in our market. J & K Home Improvement offers the highest quality materials available and backs our workmanship with a ten year limited warranty.
"Simply put, you will NOT find a better, more honest, more helpful, more easy-to-work-with, reasonably priced contractor than John Lee and his crew at J & K Home Improvement & Restoration! We had a "complicated" set of circumstances when our home was damaged by a storm, last winter. The insurance company sent out an estimator to assess the damage and, after the company recommended J & K Home Improvement & Restoration, I was introduced to John Lee. I eventually learned that John also does estimates for a variety of insurance companies (because his company is so well regarded), and he patiently listened as I described the nuances associated with our house. During our initial consultation, he was able to clearly describe all of the steps that would be necessary and answer all of our questions. Long story short, not only was John able to address EVERY single concern and request that we had regarding the eventual repairs to the house (including roof, siding, and a window upgrade that would have cost much more if we had done it at a later time), but he spent plenty of extra time making sure that everything we had talked about was addressed to our 100% satisfaction! He was also able to persuade the insurance company to cover more complete repairs than was originally specified by the first adjuster! In addition, when we had an electrical "hiccup" associated with all the pounding on the walls, John quickly sent an expert electrician to locate and correct the problem. He absolutely could have passed those charges on to us because the failure wasn't due to any mistake on the part of his crew but, instead, he picked up the unanticipated expense himself. It was truly a pleasure to work with John! He made a difficult situation as easy to manage as possible, and we would strongly recommend J & K Home Improvement & Restoration to anyone who wants to hire a quality contractor that stands behind their work and well-earned reputation!"
Stephen B on December 2022

Renewal by Andersen
Renewal by Andersen
Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation
" Renewal by Andersen of Wyoming did an incredible job with installing windows in our home. Thank you to the team who did the install and to the company for creating these exceptional windows."
Janita K on December 2025
Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation
" Renewal by Andersen of Wyoming did an incredible job with installing windows in our home. Thank you to the team who did the install and to the company for creating these exceptional windows."
Janita K on December 2025

Best Solutions Basement Repairs & Waterproofing
Best Solutions Basement Repairs & Waterproofing
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
Sears Home Improvement - Doors and Windows
Sears Home Improvement - Doors and Windows
Transform Home Improvements has been helping homeowners turn their improvement dreams into reality for more than 20 years. We provide a complete siding solution, from selecting and ordering materials to installation and beyond with expert, dedicated support every step of the way. Our vinyl siding features weather resistant, easy-maintenance wood grain texture panels, and comes in a variety of colors. Offering robust financing options* and a full catalog of selections to meet every budget, schedule your no-obligation in-home consult to see just how affordable new, high-quality siding can be. Every project comes with our satisfaction guarantee and applicable multi-year warranties. Make this your easiest improvement project yet with Transform Home Improvements. *Restrictions may apply.
"Salesman's lied about project"
Eric B on August 2025
Transform Home Improvements has been helping homeowners turn their improvement dreams into reality for more than 20 years. We provide a complete siding solution, from selecting and ordering materials to installation and beyond with expert, dedicated support every step of the way. Our vinyl siding features weather resistant, easy-maintenance wood grain texture panels, and comes in a variety of colors. Offering robust financing options* and a full catalog of selections to meet every budget, schedule your no-obligation in-home consult to see just how affordable new, high-quality siding can be. Every project comes with our satisfaction guarantee and applicable multi-year warranties. Make this your easiest improvement project yet with Transform Home Improvements. *Restrictions may apply.
"Salesman's lied about project"
Eric B on August 2025

Sears Home Improvements - Windows
Sears Home Improvements - Windows
Transform Home Improvements has been helping homeowners turn their improvement dreams into reality for more than 20 years. We provide a complete window solution, from selecting and ordering materials to installation and beyond with expert, dedicated support every step of the way. Our wide selection of vinyl replacement windows come in a variety of styles, including double-hung, casement, sliding, bay and more. Choose from multiple grades of high-quality, all Energy Star® rated window options to find what suits your budget. With low monthly payments, instant credit, and financing options available, schedule your no-obligation in-home consult to see just how affordable new windows can be. Every project comes with our satisfaction guarantee and applicable multi-year warranties. Make this your easiest improvement project yet with Transform Home Improvements. *Restrictions may apply.
"Responsive and did a good job"
Toby K on June 2024
Transform Home Improvements has been helping homeowners turn their improvement dreams into reality for more than 20 years. We provide a complete window solution, from selecting and ordering materials to installation and beyond with expert, dedicated support every step of the way. Our wide selection of vinyl replacement windows come in a variety of styles, including double-hung, casement, sliding, bay and more. Choose from multiple grades of high-quality, all Energy Star® rated window options to find what suits your budget. With low monthly payments, instant credit, and financing options available, schedule your no-obligation in-home consult to see just how affordable new windows can be. Every project comes with our satisfaction guarantee and applicable multi-year warranties. Make this your easiest improvement project yet with Transform Home Improvements. *Restrictions may apply.
"Responsive and did a good job"
Toby K on June 2024

Infinity Home Improvement, Inc.
Infinity Home Improvement, Inc.
At Infinity Home Improvement, we're passionate about creating beautiful, functional spaces that reflect your unique style and needs. We're a family-owned company with over 24 years of experience in the home improvement industry, and we pride ourselves on the quality of our work, our employees, and the products we install. We offer a wide range of services to help you improve your home, including: Gutter Helmet: The original and still the best gutter protection system on the market, Gutter Helmet keeps your gutters free of leaves, debris, and pests, so you can say goodbye to climbing ladders and cleaning gutters forever. Betterliving Sunrooms: Add extra space, light, and value to your home with a beautiful sunroom from Betterliving. Our sunrooms are custom-designed and built to last, and they come in a variety of styles to complement your home's architecture.
"Saundra, James, Jim, Johnny and Eltina did a great job, great installation. Very happy. "
michael r on November 2025
At Infinity Home Improvement, we're passionate about creating beautiful, functional spaces that reflect your unique style and needs. We're a family-owned company with over 24 years of experience in the home improvement industry, and we pride ourselves on the quality of our work, our employees, and the products we install. We offer a wide range of services to help you improve your home, including: Gutter Helmet: The original and still the best gutter protection system on the market, Gutter Helmet keeps your gutters free of leaves, debris, and pests, so you can say goodbye to climbing ladders and cleaning gutters forever. Betterliving Sunrooms: Add extra space, light, and value to your home with a beautiful sunroom from Betterliving. Our sunrooms are custom-designed and built to last, and they come in a variety of styles to complement your home's architecture.
"Saundra, James, Jim, Johnny and Eltina did a great job, great installation. Very happy. "
michael r on November 2025

WindowWorks Chicago
WindowWorks Chicago
Window Works is the best choice for all of your replacement window needs. From energy efficiency to beauty and durability, our products are made to last and improve the look and value of your home. Our glass systems can help reduce fading of carpets, drapes and furniture, all while keeping you comfortable inside no matter the weather. From traditional double-hung windows to fancy bow & bay windows and even sliding patio doors, Window Works is your one stop shop for window replacement. Our products are made in America and come with exceptional warranties. With over 21 years' experience, we can do it all. We take pride in our highly trained, experienced, expert installation teams and our knowledgeable and friendly staff. Call us today! We look forward to working with you!
Window Works is the best choice for all of your replacement window needs. From energy efficiency to beauty and durability, our products are made to last and improve the look and value of your home. Our glass systems can help reduce fading of carpets, drapes and furniture, all while keeping you comfortable inside no matter the weather. From traditional double-hung windows to fancy bow & bay windows and even sliding patio doors, Window Works is your one stop shop for window replacement. Our products are made in America and come with exceptional warranties. With over 21 years' experience, we can do it all. We take pride in our highly trained, experienced, expert installation teams and our knowledgeable and friendly staff. Call us today! We look forward to working with you!

Jack's Roofing & Siding, LLC
Jack's Roofing & Siding, LLC
We are a locally owned and operated company that values honesty and integrity and treats your home improvement project as if it were our own. We offer a wide range of roofing expertise and experience to meet the specific needs of our clients. We specialize in a variety of roofing, to include asphalt shingle, traditional tile, natural slate, flat, foam, or single-ply. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!
We are a locally owned and operated company that values honesty and integrity and treats your home improvement project as if it were our own. We offer a wide range of roofing expertise and experience to meet the specific needs of our clients. We specialize in a variety of roofing, to include asphalt shingle, traditional tile, natural slate, flat, foam, or single-ply. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!
FAQs for glass block window service projects in Cortland, IL
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 Cortland, IL homeowners’ guide to glass block window services
From average costs to expert advice, get all the answers you need to get your job done.
•Storm windows keep your more expensive windows protected from impact. Use this storm windows cost guide to get an estimate for protecting your home.
•Discover the average glass block window installation cost, including key price factors and tips to help you budget your project with confidence.

Smart glass makes your home more comfortable and energy-efficient, but at what price? Learn how much smart glass costs and if it’s a good option for you.

Learn how to install glass block windows with our detailed guide that shares what you need to know about buying materials, DIYing, and more.

Follow these step-by-step instructions to fix a cracked window yourself and avoid a costly replacement using two-part resin and basic tools.

You may have seen glass block windows before without knowing their perks. Learn the pros and cons of glass block windows and how they can benefit your home.
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