How to Replace House Windows

Welcome to our guide on how to replace house windows! If you’re a homeowner looking to update the look and functionality of your house, replacing your windows is a great place to start. Not only can new windows improve your home’s curb appeal, but they can also increase energy efficiency and reduce your utility bills.

In this article, we will guide you through the 12 steps to successfully replace your house windows. From measuring, to choosing the right window type, to installation, we’ve got you covered. We’ll also provide some additional tips and tricks to ensure that your window replacement project goes smoothly.

So, let’s get started with step one.


Step 1: Measure Your Existing Windows

The first step in replacing your house windows is to measure your existing windows. This will ensure that you order the correct size window and that it will fit properly. To do this, measure the width and height of the window from inside the frame. It’s important to measure in three places: the top, middle, and bottom of the window. Use the smallest measurement to ensure a snug fit.

Step 2: Choose Your Window Type

The next step is to choose the type of window you want to install. There are several different types of windows, including double-hung, single-hung, casement, sliding, and awning windows. Consider the style of your home and your personal preferences when choosing your window type.

Step 3: Select Your Window Frame Material

Once you’ve chosen your window type, it’s time to select your window frame material. Common materials include vinyl, wood, aluminum, and fiberglass. Each material has its own benefits and drawbacks, so do your research to determine which one is right for you.

Step 4: Remove the Old Window

Before you can install your new window, you need to remove the old one. This is where things can get a bit tricky, especially if you’ve never done it before. It’s important to be careful during this step to avoid damaging your walls or injuring yourself. Follow the manufacturer’s instructions for removing your specific window type.

Step 5: Clean the Window Opening

Once the old window is removed, it’s important to clean the window opening thoroughly. This will ensure that your new window will fit properly and seal correctly. Use a vacuum to remove any debris from the opening, and then wipe it down with a damp cloth.

Step 6: Apply Flashing Tape

After cleaning the window opening, apply flashing tape to the bottom of the opening. This will prevent water from seeping into your home and causing damage.

Step 7: Insert the New Window

Now it’s time to insert your new window. Follow the manufacturer’s instructions carefully to ensure that you install it correctly. Make sure that the window is plumb and level before securing it in place.

Step 8: Shim and Insulate the Window

Once the window is installed, it’s important to shim and insulate it. This will help to prevent drafts and improve energy efficiency. Use shims to ensure that the window is level and plumb, and then apply insulation around the edges of the window.

Step 9: Check for Proper Operation

Before you finish up, make sure to check that your new window operates properly. Open and close it a few times to ensure that it moves smoothly and seals tightly.

Step 10: Seal the Window

After checking for proper operation, seal the window with caulk. Apply a bead of caulk around the edges of the window to create a tight seal. Smooth the caulk with a caulk smoother or your finger.

Step 11: Install Trim

Next, install your interior trim. This will give your window a finished look. Follow the manufacturer’s instructions carefully to install the trim correctly.

Step 12: Repeat for Remaining Windows

Finally, repeat the process for any remaining windows that need to be replaced. Make sure to take accurate measurements and follow all of the steps carefully.


Replacing your house windows may seem like a daunting task, but it’s actually a fairly straightforward process if you follow the right steps. By measuring your existing windows carefully, choosing the right window type and frame material, and following the manufacturer’s instructions closely, you can ensure that your windows are installed correctly and that they provide the look and functionality that you desire.

Cleaning the window opening thoroughly and applying flashing tape are important steps that are often overlooked, but they can prevent water damage and ensure a long-lasting window installation. Proper installation and insulation of the window will help to maximize energy efficiency and prevent drafts.

Once your windows are installed, it’s important to regularly maintain them to ensure that they continue to function properly. Keep them clean and lubricated, and make any necessary repairs promptly.

Tips and Tricks

1. Consider Energy Efficiency

When choosing your new windows, look for ones that are energy-efficient. These can help to reduce your utility bills and improve the comfort of your home.

2. Hire a Professional if Necessary

If you’re not comfortable with DIY projects or if your windows are particularly large or complex, consider hiring a professional to install them for you.

3. Choose the Right Window Type for Your Climate

If you live in a particularly hot or cold climate, choose a window type that is designed to withstand those conditions.

4. Inspect Your Existing Windows

Before you replace your windows, inspect your existing ones carefully. If they’re still in good condition, you may be able to repair them instead of replacing them.

5. Follow the Manufacturer’s Instructions

Make sure to carefully follow the instructions provided by the window manufacturer to ensure that your windows are installed correctly.

6. Take Care with Removal

When removing your old windows, be careful not to damage your walls or injure yourself.

7. Measure Accurately

Accurate measurements are crucial when replacing your windows. Take your time and measure in multiple places to ensure that you get the right size.

8. Insulate Properly

Proper insulation around your windows can help to prevent drafts and improve energy efficiency.

9. Seal Tightly

Make sure to seal your windows tightly with caulk to prevent air and water from getting in.

10. Consider Upgrades

When replacing your windows, consider upgrading to features like low-e glass or security locks to improve the function and performance of your home’s windows.

Advantages and Disadvantages: How to Replace House Windows?

If you are considering replacing your house windows, you must weigh the pros and cons before making a final decision. Here, we will discuss the advantages and disadvantages of replacing your house windows.


1. Energy Efficiency: New windows are more energy-efficient than old ones. They come with modern insulation, reducing your energy bills and making your home more comfortable.

2. Improved Security: New windows usually come with sturdy locks and security features, making your home less vulnerable to break-ins.

3. Aesthetically pleasing: Replacing old windows with new, clean windows can dramatically improve the aesthetic value of your home.

4. Increase Home Value: Installing new windows can increase the resale value of your home, giving you a better return on investment.

5. Reduced Maintenance: New windows require less maintenance than old, worn-out windows.

6. Noise Reduction: Improved insulation and thicker glass panels can reduce outside noise and increase your home’s serenity.

7. Better Functionality: New windows are easier to operate, clean, and maintain than old windows.

8. UV Protection: New windows come with UV protection, preventing your furniture and carpets from fading.

9. Better Thermal Comfort: New windows can keep your home warm in the winter and cool in the summer, eliminating hot or cold spots.

10. More Natural Light: New windows offer more natural light and can make your home feel more inviting.


1. High Investment: Replacing windows can be expensive, making it a significant investment.

2. Unpredictable Installation: Window installations can be unpredictable, involving concealed structural problems or unexpected weather patterns.

3. Noise: During installation, loud noises may disturb your neighbors and household members.

4. Disruption: Installation will temporarily disrupt your living situation, including access to the windows and rooms.

5. Building Codes: Aesthetic restrictions and building codes may limit the type of windows you can install.

6. Window Type: Replacing windows with modern types may not match the design of your home.

7. Environmental Impact: Replacing windows, despite their increased energy efficiency, can harm the environment.

8. Unsuitable for Original Frames: It is not always possible to replace the windows without replacing the original frames, which can be difficult for older homes.

9. Regular Maintenance: Even new windows require periodic maintenance.

10. Tough Decision: Finally, deciding to replace windows can be a daunting task, requiring a lot of research and decision-making.

Now that we have weighed the pros and cons of window replacement, it is up to you to decide whether to replace your windows or not. It is always better to do your research and make an informed decision.


1. Why should I replace my house windows?

Replacing your house windows can help improve energy efficiency, enhance the appearance of your home, increase its value, and improve its security.

2. How do I know if it’s time to replace my house windows?

You should consider replacing your house windows if they are warped or damaged, if they are difficult to open or close, if you notice drafts, if the glass is cracked or broken, or if the frames are deteriorating.

3. How much does it cost to replace house windows?

The cost of replacing house windows varies depending on the size, style, and materials of the windows, as well as the cost of labor. On average, homeowners can expect to pay anywhere from $300 to $1,000 per window.

4. Can I replace my house windows myself?

If you have experience and the proper tools, you may be able to replace your house windows yourself. However, it’s often best to hire a professional to ensure the job is done correctly and safely.

5. How long does it take to replace house windows?

The amount of time it takes to replace house windows varies depending on several factors, such as the number of windows being replaced, the size and style of the windows, and the difficulty of the installation. On average, it takes about 1-2 days to replace 3-5 windows.

6. What type of windows should I choose?

The type of windows you choose depends on your budget, style preferences, and performance needs. Some popular window materials include vinyl, wood, aluminum, and fiberglass.

7. How do I measure for replacement windows?

To measure for replacement windows, measure the width and height of each window opening at three points, taking note of the smallest measurement. Use these measurements to order the appropriate size window.

8. What should I look for in a window installer?

When choosing a window installer, look for someone who is licensed and insured, has experience with the type of windows you want, has good reviews and references, and offers a warranty on their work.

9. Do I need a permit to replace house windows?

In most cases, you do not need a permit to replace house windows unless you are changing the size or shape of the opening or adding a new window where there previously wasn’t one.

10. How can I maintain my new windows?

To maintain your new windows, clean them regularly with a soft cloth or brush and a mixture of mild soap and water. Check the weatherstripping and caulking periodically to ensure a tight seal and replace them as needed.

11. How much can new house windows improve energy efficiency?

New house windows can significantly improve energy efficiency by reducing air leakage and heat loss. In fact, energy-efficient windows can save homeowners up to 15% on heating and cooling costs.

12. What are low-e coatings?

Low-e coatings are thin, metallic coatings applied to the glass surfaces of windows to reduce heat transfer and glare while allowing natural light to enter. They can significantly improve the energy efficiency of windows.

13. Can replacing my house windows qualify me for any tax credits or incentives?

Replacing your house windows with energy-efficient windows may qualify you for federal tax credits or incentives from your state or local government. Check with your tax professional or the Department of Energy for more information.

How to Replace House Windows


In conclusion, replacing house windows may seem like a daunting task, but it is definitely doable with the right tools and knowledge. Remember to measure your windows accurately before purchasing replacement windows, choose the right type of window for your needs, and prepare the area for installation. While it’s possible to replace windows on your own, it’s always recommended to seek professional help if you feel unsure or overwhelmed. By following these steps and taking the necessary precautions, you can have new, efficient windows installed in your home in no time.


Thank you for reading this guide on how to replace house windows. We hope this information has been helpful and informative. Remember, replacing your windows can increase the value of your home and improve your energy efficiency. If you have any questions or would like more information on window replacement, feel free to reach out to a professional in your area. Good luck with your window replacement project and we wish you all the best in your home improvement endeavors.