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Experience Window World's unrivaled ENERGY STAR replacement windows and other home exterior products such as doors, vinyl siding, shutters, roofing and more. Contact us to schedule your free in-home or virtual quote today!
Our church had 13 windows replaced in our Educational wing and Window World did an excellent job. All windows were on the second floor of the building so not an easy job. The workers were all professional and worked tirelessly to complete the job in 3 days. The transformation is amazing! The job was cleaned up when completed and our building has never looked this good. These are new owners and they are doing a great job! Highly recommend!
MB
Maggie Bartash
May 7, 2025
5.0
I had 11 windows replaced. Dominic and Patrick were great very professional work tirelessly I felt very comfortable and Dominic showed me a problem he found and that he was able to fix it which made me feel very happy. I would highly recommend window World for all your needs
ZC
Zachary Cox
Sep 9, 2024
5.0
Very impressed with the windows. Fair price, timely install, professional service. If they keep us warm in the winter, I’ll be thrilled.
LD
Lynn Drummond
Jan 4, 2023
5.0
I can't say enough great things about Window World! The salesman was on time and thoroughly explained everything. He answered all of my questions and didn't rush me. The installers were on time and were respectful of my home and property by keeping job site clean at all times. In this day of companies ripping people off, it's refreshing to have a positive experience with a company that truly cares about the customer's satisfaction. I will tell all of my friends about Window World!!!
Frequently Asked Questions About Window World of Northern Delaware
What types of payment methods and financing do you offer?
We offer a variety of payment methods and financing options (subject to approved credit) depending on promotional period. Please contact us for more information regarding available options.
Will the replacement windows be installed from the inside or outside?
The majority of our replacement windows are installed from the outside. In some situations it may be necessary to install from the inside. On the day of installation, your installation expert will assess your unique situation and explain the process that will best suit your home.
Do you install replacement windows year-round? If so, will I lose a lot of heat/cooling at the time of installation?
Window World installs replacement windows year-round. An average installation will take only one day. Our crews install one window at a time and are trained to do what they can to minimize heating/cooling loss. The energy savings from your new windows will recover any incremental energy costs incurred during their installation many times over during their lifetime.
How can I prepare my house for my replacement windows?
Please take down curtains, blinds, or any other window treatments. Security sensors should also be removed and turned off by your security company. Please provide our installation expert with a clear path to the window(s) being replaced by moving anything that may be in the way. It is also advisable to remove all wall decorations from the walls close to the windows as they may fall during removal or installation.
How long will it take to get my replacement windows? How much time should I allow for the installation?
Since every window ordered is custom-built to fit your home and design choices, manufacturing times vary. Once delivered, the type of window being installed and the type being removed help determine the amount of time needed to complete the job. On average, each window takes about 30 minutes. Trim work and cleanup will require additional time to complete. An average job will take a single day.
What type of warranty is available for my windows?
All windows and patio doors we sell come with a manufacturer’s lifetime limited warranty and a repair labor guarantee, good for as long as you own your home! Contact us or see our warranties page for more details.
What happens to my old windows?
After installing your new replacement windows we remove all old windows from your property and dispose of them properly. If you wish to keep your old windows or storm windows, please notify the installation crew as soon as it arrives for your installation.
What do I do if there is a problem with the windows?
Most of the issues encountered by our customers are easily corrected and don't necessarily mean that there is a problem with your window. You are always welcome to contact us for help.