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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon739
    Verified window services reviews

Top-Rated Window pros in North Potomac - Updated Nov 2026

Avatar for Unicorp Home Energy Services
Unicorp Home Energy Services
4.9(
630
)
New Windows - 6 +New Windows - 2 - For BusinessNew Windows - 3-5 - For Business+3 more

Serving North Potomac, MD and surrounding areas

Approved

In business since 1987

Free estimates

Warranties offered

"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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+10

Response time1 day
Response rate100%
9 neighbors recently requested a quote
Avatar for VIRGINIA WINDOW CLEANERS INC
VIRGINIA WINDOW CLEANERS INC
4.6(
76
)
Window Cleaning

Serving North Potomac, MD and surrounding areas

Approved

In business since 1963

Free estimates

Credit card accepted

"We had them clean the inside/outside/screens and sills, it was night and day how much better we could see afterwards. I didn't realize how dirty all of our windows were. The used just water on the windows too, I was shocked that no streaks were present afterwards. I will be looking to do this more often in the future and would not hesitate to use Virginia Window Cleaners again."
Response time1 day
10 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for A.R. Glass Repairs
A.R. Glass Repairs
5.0(
22
)
Window Glass - Install or Replace

Serving North Potomac, MD and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"Excellent work. The person who assisted us was gruff and no-nonsense, but professional. He asked that we send a photo of the window, which we did. He then came out and measured the window. He came back a couple of days later, and completed the work. The window looks fantastic, and we are very pleased with his work."
Response time1 day
Response rate100%
Recommended by85%of homeowners
Avatar for A Clear View Window Cleaning, LLC
A Clear View Window Cleaning, LLC
5.0(
22
)
Window Cleaning

Serving North Potomac, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Credit card accepted

"Windows and sliding doors cleaning were great. Power wash included gutters which really needed it! Small issue of a broken flood bulb was resolved the next day and the resolution was above and beyond expectations. Will using them again on the spring!"
Response time2 days
18 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Atlantic Sun Control, Inc
Atlantic Sun Control, Inc
4.8(
60
)
Window Tinting - Apply or Replace

Serving North Potomac, MD and surrounding areas

Approved

In business since 1991

Free estimates

Warranties offered

"The team that performed the work were excellent. They took great care to protect my wood floors and were very neat. I decided to do more windows and I'm using them again."
AT&T Building
AT&T Building
AT&T Building
Additional Photos
Additional Photos

+3

Response time5 days
1 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Superior Pressure Washing
Superior Pressure Washing
4.9(
69
)
Window Cleaning

Serving North Potomac, MD and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"It went very well considering the weather did not cooperate. Pete's crew came promptly at the time scheduled to do the power washing and clean the gutters even though we were experiencing light rain showers. They did an excellent job. They even power washed the mailbox post even though it was not part of the work requested. Because it was raining and the deck needed to dry before applying stain, the windows and stain application were scheduled for 3 days later. Again, Pete and a crew showed up that Saturday at 8am and worked until 6pm. He also used a moisture meter to make sure deck was dry enough to stain (there had been a brief light shower the day before). We have a very large deck, so they were not able to complete everything. Pete returned the following Tuesday to finish staining, repair the lattice and water proof the wood along the walkway. There was a small section of grass that somehow had been damaged when the crew was applying the stain. Pete went home where he happened to have some sod and brought enough to repair and cover this section of the lawn. Through the entire process, he was very proactive with phone calls and emails and responsive to all questions and inquiries regarding the work. His crew was polite and worked hard. I very pleased with the results."
Dirty House
Clean House
Dirty Deck
Clean Deck
Concrete Steps

+1

Response time7 hrs
Response rate100%
Recommended by95%of homeowners
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Windows FAQs, answered by experts

Use a high-quality caulk with silicone around your windows, as it’s waterproof and shrink-proof. Or, you can use a caulk consisting of polyurethane or acrylic if you want to be able to paint over it. Caulk made from silicone is not paintable. Avoid using inexpensive caulk that has a resin or oil base. These caulks will not last long and may shrink and pull away from the window as temperatures go up and down.

It’s time to replace your windows if most or many are in poor shape. In that case, new fiberglass windows will increase the energy efficiency of your home and add to its overall visual appeal, inside and out. Replacing your windows also can allow you to find a style that better suits the character of your home.

Constant fixes can be expensive over time, and by replacing your windows, you can be at ease knowing you now have windows that function properly and make your home more energy-efficient.

A garden window is about 16 inches to 24 inches deep. This extra space makes room for small potted plants, which is how the garden window, also called a greenhouse window, got its name. Because garden windows jut outward from the house, they need to be installed in a place where they won’t obstruct walkways.

Glass block windows typically last for 15 to 30 years, which is slightly less than the 20- to 50-year lifespan of standard windows. You can extend their life by resealing them every few years. Professional installation is also key to ensuring the windows are placed correctly and will function properly for years to come. A professional installer will have the necessary skills, tools, and knowledge to install these features and can identify potential issues like damaged frames or cramped areas during a consultation.

Windows last between 15 and 30 years on average. The glass tends to last for around 20 years, while the frames last up to 50 years. This varies by the type of window frame material, glass quality, location, and level of maintenance. Wood frames have the shortest lifespan and require repainting or resealing every couple of years, while fiberglass has one of the longest lifespans.

The North Potomac, MD homeowners’ guide to window services

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