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Avatar for Zen Windows of Washington DC

Zen Windows of Washington DC

5.00(
109
)
Approved Pro

Zen Windows of Washington DC

5.00(
109
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
28 years of experience

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.

"Our builder grade 1990s wood windows, door, transom and site-lite windows had all suffered from age and neglected painting. They were all long overdue for replacement and then we discovered Zen Windows of Washington, DC. They are consummate professionals. Their high quality, energy efficient products backed by a transferable lifetime warranty, strong technical knowledge, excellent value (price/quality relationship), pressure free consultative sales approach, and absolutely incredible install team left us 100% satisfied from beginning to end. The leader of the install team promised us that they would do the install as if it was his own home and actually did! I am very detail oriented and given the complexity of the job, their work was truly unbelievable. It’s perfect! Don’t waste your time with Andersen, Pella, Thompson Creek or others. Look no further than Zen Windows of Washington DC and work together with them to find the best solution for you. You will be very happy you did."

Devon S on June 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.

"Our builder grade 1990s wood windows, door, transom and site-lite windows had all suffered from age and neglected painting. They were all long overdue for replacement and then we discovered Zen Windows of Washington, DC. They are consummate professionals. Their high quality, energy efficient products backed by a transferable lifetime warranty, strong technical knowledge, excellent value (price/quality relationship), pressure free consultative sales approach, and absolutely incredible install team left us 100% satisfied from beginning to end. The leader of the install team promised us that they would do the install as if it was his own home and actually did! I am very detail oriented and given the complexity of the job, their work was truly unbelievable. It’s perfect! Don’t waste your time with Andersen, Pella, Thompson Creek or others. Look no further than Zen Windows of Washington DC and work together with them to find the best solution for you. You will be very happy you did."

Devon S on June 2025


Avatar for Unicorp Home Energy Services

Unicorp Home Energy Services

4.95(
543
)
Approved Pro

Unicorp Home Energy Services

4.95(
543
)
Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
38 years of experience

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 - [email protected].

"We just had Unicorp install new windows throughout our entire house. The window quality is excellent and the installation went very well. We were replacing 55 years old windows - and were very happy with the entire process, from selection, exterior color choices, and finally installation."

sheila t on May 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 - [email protected].

"We just had Unicorp install new windows throughout our entire house. The window quality is excellent and the installation went very well. We were replacing 55 years old windows - and were very happy with the entire process, from selection, exterior color choices, and finally installation."

sheila t on May 2025


Avatar for Basement Gurus, LLC

Basement Gurus, LLC

4.84(
151
)
Approved Pro

Basement Gurus, LLC

4.84(
151
)
Approved Pro
Customers say: Quality work
15 years of experience
Free onsite estimate

Basement Gurus LLC, is a locally owned and operated company with over 20 years of experience. We specialize in professional waterproofing services. Our commitment is 100% guaranteed customer satisfaction on every project. Call us today, so that we can give you a free estimate and make your project come to life!

"I was getting water in my basement every time it rained, Dan helped me rule out other causes and recommended a french drain. Basement has been bone dry ever since. The workers took great care and even repaired the water damage from before. I highly recommend calling Basement Gurus for any basement related needs"

Andrew R on December 2025

Basement Gurus LLC, is a locally owned and operated company with over 20 years of experience. We specialize in professional waterproofing services. Our commitment is 100% guaranteed customer satisfaction on every project. Call us today, so that we can give you a free estimate and make your project come to life!

"I was getting water in my basement every time it rained, Dan helped me rule out other causes and recommended a french drain. Basement has been bone dry ever since. The workers took great care and even repaired the water damage from before. I highly recommend calling Basement Gurus for any basement related needs"

Andrew R on December 2025


Avatar for Presidential Exteriors LLC

Presidential Exteriors LLC

4.88(
145
)
Approved Pro

Presidential Exteriors LLC

4.88(
145
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
10 years of experience

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.

"I appreciated working with Nick, Vick, Nico and Angel. I had a many day project replacing my roof, gutters and patching/painting drywall. Everyone has been great with communication and follow through. All employees were pleasant and professional. I would highly recommend this company."

Elaine C on December 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.

"I appreciated working with Nick, Vick, Nico and Angel. I had a many day project replacing my roof, gutters and patching/painting drywall. Everyone has been great with communication and follow through. All employees were pleasant and professional. I would highly recommend this company."

Elaine C on December 2025


Avatar for Peak Custom Remodeling Corporation

Peak Custom Remodeling Corporation

4.91(
116
)
Approved Pro

Peak Custom Remodeling Corporation

4.91(
116
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
20 years of experience

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.

"Great work"

max d on August 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.

"Great work"

max d on August 2025


Avatar for Cornerstone Hydro Wash

Cornerstone Hydro Wash

5.00(
18
)
Approved Pro

Cornerstone Hydro Wash

5.00(
18
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
10 years of experience

Ask about our current promotions! Cornerstone Hydrowash is the one stop shop business for exterior cleaning and painting. We have the safest and most high grade professional equipment and technicians. Proudly serving happy customers in the Chesapeake area. We've been in business for 22 years. We are licensed and insured and we strive to provide excellent customer service at affordable prices. Complete satisfaction is our top priority for your home or business.

"The work performed was outstanding. Cornerstone Hydro Wash was professional, knowledgeable & clearly experienced. I was looking for more expertise than a lawn company that had a pressure washer. Pressure washing, among other things, IS their business, and they had the equipment, chemicals, knowledge & a truckload of commercial equipment to get the job done right. Not only did I get my deck & my whole house washed, but Brian amazingly transformed my driveway, sidewalk & porch. They are reasonably priced - worth every dollar. I highly recommend them..."

John B on August 2025

Ask about our current promotions! Cornerstone Hydrowash is the one stop shop business for exterior cleaning and painting. We have the safest and most high grade professional equipment and technicians. Proudly serving happy customers in the Chesapeake area. We've been in business for 22 years. We are licensed and insured and we strive to provide excellent customer service at affordable prices. Complete satisfaction is our top priority for your home or business.

"The work performed was outstanding. Cornerstone Hydro Wash was professional, knowledgeable & clearly experienced. I was looking for more expertise than a lawn company that had a pressure washer. Pressure washing, among other things, IS their business, and they had the equipment, chemicals, knowledge & a truckload of commercial equipment to get the job done right. Not only did I get my deck & my whole house washed, but Brian amazingly transformed my driveway, sidewalk & porch. They are reasonably priced - worth every dollar. I highly recommend them..."

John B on August 2025


Avatar for Maryland Windows Doors Roofs

Maryland Windows Doors Roofs

5.00(
22
)
Approved Pro

Maryland Windows Doors Roofs

5.00(
22
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
16 years of experience

We are dedicated to service, service, service. No matter how large or small the project, we want to make sure we deliver exactly what you're expecting. We review the project and discuss all the details involved in the design and execution. Our goal is to deliver exactly what our customers expect, and to do it well. From door surrounds to complete makeovers, we have the design skills to help develop a coherent plan for your home. Whether you want to do it all at once or a piece at a time, we have computer imaging available to make the process simple. Great craftsmanship, clean projects. Additional email: [email protected].

"We’re very pleased with the results. Front door is the best feature of the house front. Keith provides the best choices for the front door concerning any weather exposure. Employees showed up on time and did a high quality work. They left the workspace spotless. A few months later we had gutters replaced and capping done. Once again, the crew showed up on time and did high quality work. Keith improved the gutter design on the front and on one of the sides of the house. Old gutters were way too small for the size of the roof and couldn’t handle the amount of rain we’ve been having lately. The new gutters are bigger and handle the amount of rain without overflowing. The price for the projects was very reasonable especially compared to other local businesses."

Daina H on May 2019

We are dedicated to service, service, service. No matter how large or small the project, we want to make sure we deliver exactly what you're expecting. We review the project and discuss all the details involved in the design and execution. Our goal is to deliver exactly what our customers expect, and to do it well. From door surrounds to complete makeovers, we have the design skills to help develop a coherent plan for your home. Whether you want to do it all at once or a piece at a time, we have computer imaging available to make the process simple. Great craftsmanship, clean projects. Additional email: [email protected].

"We’re very pleased with the results. Front door is the best feature of the house front. Keith provides the best choices for the front door concerning any weather exposure. Employees showed up on time and did a high quality work. They left the workspace spotless. A few months later we had gutters replaced and capping done. Once again, the crew showed up on time and did high quality work. Keith improved the gutter design on the front and on one of the sides of the house. Old gutters were way too small for the size of the roof and couldn’t handle the amount of rain we’ve been having lately. The new gutters are bigger and handle the amount of rain without overflowing. The price for the projects was very reasonable especially compared to other local businesses."

Daina H on May 2019


Avatar for Jim Ness

Jim Ness

4.86(
25
)
Approved Pro

Jim Ness

4.86(
25
)
Approved Pro
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
40 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade, and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Man sent to do various odd jobs in Germantown--install blinds, TV mount, cabinet, etc.--was efficient and easy to communicate with. Did exactly what I needed with quality work and kept me informed of any problems he encountered. Price was reasonable."

James M on March 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade, and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Man sent to do various odd jobs in Germantown--install blinds, TV mount, cabinet, etc.--was efficient and easy to communicate with. Did exactly what I needed with quality work and kept me informed of any problems he encountered. Price was reasonable."

James M on March 2025


Avatar for Power Home Remodeling

Power Home Remodeling

4.31(
837
)
Approved Pro

Power Home Remodeling

4.31(
837
)
Approved Pro
Customers say: Quality work
33 years of experience
Free onsite estimate

As the nation’s largest full-service exterior home remodeler, we are backed by over 1,000+ Angi Super Service awards and more than one million happy customers. Why? Because we treat each job as an audition. An opportunity to prove ourselves to you. And the results speak for themselves. So make your home all it was meant to be with our unrivaled exterior services. Contact us today for a free, no obligation estimate on replacement windows, roofing, siding, doors, or attic insulation.

"Power Home Remodeling has been fantastic. We had them come out to replace our gutters and were very impressed with the quality of their work. The crew that did the job kept everything clean and organized; you wouldn’t have known they had been there, which is uncommon for many companies. We were so impressed that we are now moving forward with replacing our siding. Everyone at Power Home Remodeling has been incredibly helpful throughout this process, and we couldn’t be happier. We will work with them on future home projects."

Jonathan R on June 2025

As the nation’s largest full-service exterior home remodeler, we are backed by over 1,000+ Angi Super Service awards and more than one million happy customers. Why? Because we treat each job as an audition. An opportunity to prove ourselves to you. And the results speak for themselves. So make your home all it was meant to be with our unrivaled exterior services. Contact us today for a free, no obligation estimate on replacement windows, roofing, siding, doors, or attic insulation.

"Power Home Remodeling has been fantastic. We had them come out to replace our gutters and were very impressed with the quality of their work. The crew that did the job kept everything clean and organized; you wouldn’t have known they had been there, which is uncommon for many companies. We were so impressed that we are now moving forward with replacing our siding. Everyone at Power Home Remodeling has been incredibly helpful throughout this process, and we couldn’t be happier. We will work with them on future home projects."

Jonathan R on June 2025


Avatar for JS Castle Contracting

JS Castle Contracting

4.97(
15
)
Approved Pro

JS Castle Contracting

4.97(
15
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
20 years of experience

At JS Castle Contracting, LLC, our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. Call today for a quote.

"Have used Joe 3 times now. First to replace 4 exterior doors. Second to refinish some interior paint and trim. Lastly for a complete kitchen remodel. Each and every time he was prompt and very professional with great attention to detail. He has a permanent place in my address book and will certainly be called on again, probably sooner than later."

patrick w on September 2021

At JS Castle Contracting, LLC, our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. Call today for a quote.

"Have used Joe 3 times now. First to replace 4 exterior doors. Second to refinish some interior paint and trim. Lastly for a complete kitchen remodel. Each and every time he was prompt and very professional with great attention to detail. He has a permanent place in my address book and will certainly be called on again, probably sooner than later."

patrick w on September 2021

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Glass Block Windows questions, answered by experts

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.

If you like to be certain of your privacy at home, glass block windows might be your match. They offer privacy without preventing light from entering, while also providing enhanced security. Plus, they increase your home’s energy efficiency.

New glass costs anywhere from $3 to $100 per square foot. More specifically, tempered and insulated glass—a common option for sliding glass doors—costs between $10 and $14 per square foot.

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.

Luckily, glass block windows need minimal maintenance. Other than regular cleaning, the only maintenance involved in having a glass block window is inspecting for cracks every year and applying sealer to the mortar joints if the blocks are set in masonry mortar. Glass block windows hold up well against wind and moisture better than traditional windows and are not prone to rot.

The Mount Airy, MD 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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