How To Replace A Window

Replacing a window may seem like a daunting task, but with the right tools and a little bit of know-how, it can be a relatively simple project. In this article, we will be discussing how to replace a window in a step-by-step guide. Whether you want to upgrade your windows for energy efficiency or simply want to improve the look of your home, this guide will help you get the job done.

Step 1: Measure the Window

Before you start removing the old window, you need to measure the size of the window opening to ensure that you purchase the correct size replacement window. Measure the width and height of the window opening in three different places to ensure accuracy. Make sure to measure from the inside of the window frame.

Step 2: Remove the Old Window

Now that you have the correct measurements, it’s time to remove the old window. Start by removing the window sash, which is the movable part of the window. Then, remove the window frame by unscrewing it from the window opening. Be sure to wear gloves and eye protection during this process.

Step 3: Prepare the Window Opening

After removing the old window, you need to prepare the window opening for the new window. Remove any old caulking, paint, or debris from the opening. Then, inspect the window opening for any damage or rot. If you find any damage, repair it before installing the new window.

Step 4: Install the New Window

Now it’s time to install the new window. Start by placing the window into the opening and making sure it’s level. Then, secure the window in place by screwing it into the window opening. Finally, apply caulking around the window to seal it.

Step 5: Finish the Installation

Once the window is installed, you need to finish the installation. Install any hardware, such as locks or latches, and apply trim around the window to give it a finished look. Then, test the window to make sure it opens and closes properly.

Frequently Asked Questions

Q: Can I replace a window by myself?

A: Yes, replacing a window can be a DIY project. However, it’s important to have the right tools and follow the proper steps to ensure a successful installation.

Q: How much does it cost to replace a window?

A: The cost of replacing a window can vary depending on the size of the window and the type of window you choose. On average, you can expect to pay between $300 and $700 per window.

Q: How long does it take to replace a window?

A: The time it takes to replace a window can vary depending on the experience level of the installer and the size of the window. On average, it takes between 2 and 4 hours to replace a window.


Replacing a window can be a great way to improve the energy efficiency and appearance of your home. By following these simple steps, you can replace a window yourself and save money on installation costs. Remember to measure the window opening, remove the old window, prepare the opening, install the new window, and finish the installation. With a little bit of patience and attention to detail, you can have a beautiful new window in no time.