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how to replace basement windows
Image Credit: Melissa Kopka, Istockphoto

How to Replace Basement Windows In Just a Few Simple Steps

Are you tired of the draft coming through your outdated basement windows? Maybe you want to give your basement a fresh and updated look. Well, look no further! In this post, easy-to-follow guide, we’ll show you how to replace basement windows in just a few simple steps, leaving you with a more comfortable and aesthetically pleasing space.

First things first, removing your old windows is crucial. This can be done by removing any screws or nails and then prying the window frame away from the wall. Once the frame is removed, you must clean up any excess caulking or debris left behind.

Next up, it’s time to select your new replacement windows. The type of window you choose will depend on your needs and style preferences. Whether you’re looking for a single or double-hung window, slider window, or even a hopper window, there are plenty of options. We’ll cover all your options so that you can make an informed decision.

So, if you’re ready to say goodbye to those drafty old basement windows, grab your tools, and follow along as we show you how to replace basement windows in just a few easy steps!

Gather Your Tools and Materials

If you’re planning to replace the windows in your basement, the first step is to gather all the necessary tools and materials. Here’s a comprehensive list of what you’ll need:

  • Measuring tape for accurate measurements
  • Pry the bar to remove the old window frame
  • Hammer for removing nails and screws
  • Utility knife to cut any necessary materials
  • Caulk gun for applying silicone caulk
  • Silicone caulk to seal the new window in place
  • A replacement window that fits your basement window opening
  • Window insulation kit to improve energy efficiency

To begin the process of replacing your basement windows, make sure you have all of the tools and materials listed above. This will ensure you have everything you need to complete the task efficiently and effectively.

Once you have all of your tools and materials, start by measuring the dimensions of the opening where the replacement window will be installed. Use a measuring tape to get accurate measurements to purchase a replacement window that fits perfectly.

Next, use a pry bar and hammer to remove the old window frame. Be careful not to damage the surrounding wall or window sill during this process. Once the old frame is removed, clean the area thoroughly to ensure a clean surface for the new window to be installed.

Apply a generous amount of silicone caulk to seal the new window in place. Use a caulk gun to apply it evenly and work it into any gaps or crevices around the frame.

Finally, install the replacement window, ensuring it’s level and secure. Use a window insulation kit to improve energy efficiency and prevent drafts.

By following these steps and using the right tools and materials, you can successfully replace your basement windows and improve your home’s overall functionality and energy efficiency.

Measure Your Existing Window

Replacing basement windows can be daunting, but it can be a relatively straightforward process with the right tools and knowledge. The first step in replacing a basement window is to measure the existing window frame. To accurately measure the window, take the height and width of the existing window frame from inside the basement. Measuring from the smallest points of the frame is essential to ensure the replacement window fits correctly. You can use a measuring tape or a ruler to get these measurements.

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Once you have measured the existing window, it’s time to choose the right replacement window. Look for a window that fits your measurements and matches your home’s style. When selecting, consider the replacement window’s materials, energy efficiency, and cost.

When you have chosen the right replacement window, it’s time to remove the old window. First, remove any trim or molding around the window frame. Then, carefully remove the old window from the frame. You may need to scrape away any old caulk, putty, or adhesive to remove the old window.

After you have removed the old window, it’s time to install the new one. Apply a sealant to the new window frame and set it into the opening. Use shims to make sure the window is level and plumb. Then, secure the window in place by screwing it into the frame. Finally, add any trim or molding to finish the installation.

Replacing a basement window may seem challenging, but it can be quick and easy with the right steps. By measuring your existing window, choosing the right replacement, removing the old window, and installing the new one, you can have a new, energy-efficient window in your basement in no time.

Remove the Old Window

Replacing basement windows can be challenging, but it can be done quickly with the right tools and guidance. The first step to replacing a basement window is removing the old one. To begin, grab a pry bar and use it to loosen the window frame. If your window has been painted shut, take a utility knife and carefully cut through the paint to loosen the frame.

Once the frame is loosened, use your hands to pull it out of the opening. Be mindful not to damage the area surrounding the frame. You may need to wiggle the frame back and forth to loosen it from the wall completely. If the frame is still stuck in place, use the pry bar to pry it away from the wall gently.

After removing the old window frame, take a moment to clean up any debris left behind in the window opening. Use a vacuum or broom to remove any dirt or dust. If any nails or screws are left in the frame, remove them to prevent any accidents or injuries.

Removing an old basement window is the first step toward replacing it. Use a pry bar to loosen the frame and a utility knife to cut through any paint if necessary. Be careful not to damage the surrounding area as you remove the frame, and remember to clean up any debris left behind. With these steps, you’ll be well on your way to replacing your basement window.

Clean the Window Area

Replacing basement windows can be daunting, but it can be a breeze with the right tools and approach. Once the old window is removed, cleaning the area is next. Cleaning the window area is a crucial step in replacing basement windows. It ensures that the new window will be installed tightly and securely, providing maximum insulation and preventing air leaks.

Start by removing any old caulk or debris from around the window frame. This will help to create a clean and smooth surface for the new window to be installed. A simple scraper can be used for this task, but it’s essential not to damage the surrounding area. Take your time and work slowly to avoid any potential damage.

Next, use a vacuum or a broom to remove any dust or remaining debris from the window area. This is important because any remaining dust or debris can prevent the new window from sealing correctly, which could result in air leaks and decreased insulation.

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After thoroughly cleaning the window area, it’s time to measure the space to ensure the new window will fit correctly. This is a vital step, as an incorrect measurement could result in an ill-fitting window, which can be frustrating and costly.

In summary, cleaning the window area is essential to replacing basement windows. This step ensures a tight and secure seal for the new window and helps to prevent any air leaks. Take your time, be careful, and work diligently to ensure the window area is clean and debris-free before moving on to the next step. By following these simple steps, replacing basement windows can be a stress-free and successful project.

Install the New Window

The initial step in the replacement of basement windows is the installation of the new window. Begin by placing the window into the opening from the inside, ensuring that it fits securely. It is crucial to ensure that the window is the correct size for the opening to avoid any gaps or spaces.

Once the window is in place, secure it by driving screws into the frame. It is essential to use screws that are long enough to go through the window frame and into the surrounding wood frame. This will provide the necessary stability to keep the window securely in place.

Before screwing the window in place, ensure it is level and plumb. Use a carpenter’s level to ensure the window is level and a plumb line to ensure it is vertically straight. If the window is not level or plumb, it may not function correctly, and water could seep through the gaps.

Finally, double-check that the window is securely screwed in place before finishing up the installation. Remember to seal any gaps or spaces to prevent drafts and water leakage. By following these steps, you can be sure that your new basement window is installed correctly and will provide you with years of service.

Apply Caulk

One of the most important steps when replacing basement windows is applying caulk. This seals the window frame and prevents drafts or moisture from entering your home. To do this, begin by installing the window itself. Once the window is securely placed, it’s time to apply the caulk.

Start by choosing a high-quality silicone caulk that is rated for outdoor use. Silicone is a great choice because it is durable and flexible, which allows it to withstand the changing temperatures and weather conditions that your basement windows may be exposed to. You will also need a caulking gun to apply the caulk.

Hold the caulking gun at a 45-degree angle to the window frame. Position the caulk tube’s tip where the window meets the frame. Squeeze the trigger gently to apply a steady bead of caulk around the entire perimeter of the frame.

Be sure to apply enough caulk to create a tight seal. A generous amount is necessary to ensure no gaps or cracks where drafts or moisture can enter your home. Use your finger or a caulk smoothing tool to smooth out the caulk and remove any excess.

Once the caulk is applied and smoothed out, allow it to dry completely before painting or finishing the frame. This will typically take 24-48 hours. Once the caulk is dry and the frame is fully finished, your new basement window will be ready to provide you with years of reliable service.

By applying caulk properly, you can ensure that your basement stays dry and comfortable all year round. So if you plan on replacing your basement windows, include this important step in your project plan.

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Install Window Insulation Kit

Replacing basement windows can be a daunting task, but it’s worth it to maintain a comfortable living space and save on energy costs. Installing a window insulation kit is one way to ensure energy efficiency further and prevent drafts.

To get started, purchase a window insulation kit from your local hardware store. These kits typically contain everything you need, including clear plastic film and double-sided tape. Once you have your kit, follow the manufacturer’s instructions to install the insulation.

First, clean the edges of the window frame with a damp cloth to ensure the tape will adhere properly. Then, apply the tape to the frame’s edges, ensuring it covers all seams and gaps. Once the tape is in place, stretch the plastic film tightly over the frame, ensuring no wrinkles or gaps. Finally, use a hair dryer to shrink the film and create a tight seal around the window.

Installing a window insulation kit will prevent drafts and keep your basement warm in the winter and cool in the summer. This simple and easy-to-install solution is a great way to enhance your home’s energy efficiency while ensuring a comfortable living space. So don’t hesitate to tackle that basement window replacement project and invest in a window insulation kit today!

Finish Up

When you have successfully replaced your basement window, the last step is to finish up the process. This entails getting rid of any debris or tools that were used during the replacement process. Doing this will give you a clear and clean area that looks more organized.

Additionally, once you are finished, you can sit back and enjoy the new addition to your basement without worrying about any loose materials or tools lying around. With this simple upgrade, you will notice a significant improvement in the appearance and comfort of your space.

Measuring the opening and selecting a suitable window size is essential for replacing basement windows. Once you have the right window, remove the old one by carefully prying it out. Then, clean the area and place the new window in the opening. Finally, secure the window and finish by clearing the area of debris and tools.

Overall, by replacing your basement window, you can create a better living space that is more comfortable and aesthetically pleasing. Just take the necessary steps to finish the process and enjoy the results!


In conclusion, knowing how to replace basement windows is a valuable skill that can save you time and money. With the right tools, measuring techniques, and installation knowledge, it’s a straightforward process that any homeowner can do. Remember to double-check your measurements and have all the necessary supplies before starting, as this will help to minimize any issues that may arise during the process.

One of the critical steps in replacing a basement window is removing the old one. This can be tricky, but with patience and care, it can be done without causing damage to your home. Once the old window is out, cleaning the area thoroughly before installing the new one is essential. Applying caulk and an insulation kit will help to ensure a snug and airtight fit for maximum energy efficiency.

Replacing a basement window is an excellent DIY project worth the effort. Following these simple steps, you can have a more comfortable and aesthetically pleasing basement in no time. With a little elbow grease and some basic tools, you can tackle this project like a pro and enjoy the benefits of a well-done job.

About Alan Hudson

Alan Hudson is an Editorial Director at DMA Homes, a social media and publishing agency. He writes about home interior design and decorating, as well as home decoration trends. Alan graduated from the University of Edinburgh, Scotland, with a degree in English Literature.

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