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Q & A

Answers to commonly asked questions from the experts on Thumbtack.

How do you replace a window?

You may want to replace a window if the glass has been damaged, you’re remodeling a room, or you want to upgrade your energy efficiency as well as your style by getting rid of those drafty single panes that are losing you money. When replacing a window, you can remove and replace the entire window down to the house frame. This method is best if the existing frame is damaged or deteriorating, but requires construction skills and know-how and will take more time and money. An easier and less expensive option is to install an insert replacement window into the existing frame. Insert replacements are only an option if your window frame is in good condition without rot or damage.

When replacing an entire window, first you’ll carefully remove the existing window with a pry bar and other tools. Next, you’ll make any repairs and adjustments needed to the existing frame or header and studs to ensure that the space is perfectly plumb and square, so the new window will sit perfectly within the space. Next, install the new window from the exterior, securing it into place. You’ll need to precisely wrap and insulate the window to ensure it doesn’t leak. Then, install the interior casing and exterior trim (as needed). If you prefer to hire a professional to install a window, consider replacing more than one window at a time, as the pro can work more efficiently.

How much would it cost to put in new windows?

The cost to replace a window can vary depending on factors such as window size, type of glass, brand of window, necessary trim repair, and any construction work required for installation. Labor rates and cost to do business in your region will also affect the cost. The national average window installation cost is $2,650 per project. Here are some examples of average trim repair and window replacement costs:

  • Trim repair:
    • Line and case a window frame with an MDF product: $400.
    • Line and case a window frame with raw hemlock wood: $500.
  • Approximate cost to install five windows at one time: $3,000.
  • Approximate cost to install one double-hung, energy-efficient 3-foot by 4-foot window: $500-$550.
    • For the same window size (3-foot by 4-foot) from a different manufacturer made with a specialty fiberglass exterior and all-wood interior, the cost could go up to $1,500.
    • Pricing can go as high as $5,000 for a bay or bow window with specialty glass and framing.
      • These examples include removal and disposal of old materials and window.

How much is a custom window?

Choosing custom windows will increase your window installation cost but will provide you with exactly what you want. The average national cost for window installation is $2,650. Your custom window costs will vary based on several factors. The first factor is the type of frame you want. The four most common types of frames are vinyl, fiberglass, aluminum and wood. Wood is typically the most expensive option, followed by aluminum. The type of glass you select will also affect cost. There are single-, double- and triple-pane windows. Most double- and triple-pane windows have gas sealed between the panes that act as insulation. Windows typically cost more the more energy-efficient they are, though this efficiency can save you money on utility bills in the long run. The type of glass used can also affect cost. There are different grades of glass — high-performance glass, low-e coated glass, and more — which all provide you with better insulation. In addition, the number of unified inches (window height x window width) you need will affect cost. The cost of custom windows will also be affected by installation cost and whether any repair or construction work is required to properly fit the new window.

Reviews for Ashburn window professionals
Ryan S.
Repaired a window for us and fixed a window from letting a draft into a bedroom. Fast, great prices, professional, responsive. Definitely recommend to anyone that needs window repairs! A+!
S.B Glass ProS.B Glass Pro
Rajesh K.
Did a great job of replacing the window and very responsive.
Glass master VAGlass master VA
Alejandro was great. Had 5 windows that I needed repaired. Was able to fix 4. The 5th window needed a new part. He ordered the part, replaced it, and installed it without any issues.
Geoffrey H.
Replaced glass on three, large fixed windows in my 2 story family room. Builder sealed in the windows with dry wall so it was a struggle to remove and install. They did an amazing g job and cleaned up after.
Endrias A.
I had a foggy window on one of the bedrooms, and they came and gave me an estimate and in 2 days came and installed the new windows. Fast response, clean work, good communication, professional work, all on all they did an amazing job.
Glass master VAGlass master VA
Sridhar K.
Alejandro was so timely and prompt. Fixed both my windows pretty quickly. Great quality of work.
Angela G.
very nice people and did excellent work. We will rehire them again for any window problems in our new home.
Loudoun Crown MouldingLoudoun Crown Moulding
Wanda N.
Alejandro came the same day and have us a quote for our cracked window. He was very honest and told us we only had to replace the glass and not entire window. By choosing him, we saved a lot of money bc other contractors were quoting a lot more. He is very nice and courteous. Definitely would hire again.
Mimi T.
Tech is very experienced, reasonably priced, he returns fast in 7 days after measurements. It’s a new double glasses pane quality window for $295 included labor. Highly recommend.
Laxman U.
One of our windows had cracked due to high winds. Once I contacted Glass master, they were responsive in providing an estimate and coming down to fix it. They came on time and work quality was great.
Glass master VAGlass master VA
Thumbtack Customer
I needed a window fixed ... Karim was able to get to me in one day and was very fairly priced ... extremely pleased with the service I received and would highly recommend him .. Shawn W. from Ashburn
Secure GlassSecure Glass
Kr C.
They were the least expensive and quickest of places I called. Some places were going to need to order the glass in for my dual pane window replacement but they were able to do the project within a couple days, same day! Professional, great job!
The Window Hospital Inc.The Window Hospital Inc.
Saurav S.
Glass Masters were excellent in providing a good price that beat other company estimates and replaced two windows very quickly and in a timely manner. They were extremely knowledgeable and professional. I would recommend on having them come give an estimate for any job that you may have.
Glass master VAGlass master VA
Pooja K.
Alejandro is very kind and professional. He gave us an estimate and also negotiated on the pricing. Came in for a free estimate but ended up repairing the window the same day since it was a quick fix and didn't require any replacement of parts. I would recommend SASA Glass Services for their exemplary customer service.
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