How to Install Replacement Windows: A Guide to a Successful Project

Replacing your windows can be a great way to improve your home’s look and energy efficiency. It is not as difficult as you may think to install replacement windows yourself. You have to measure the frame and opening first, remove the old window and then install the new one. After that, you will enjoy a new set.

Measure for Replacement Windows

The first thing you need to do is to take accurate measurements. You’ll need three measurements for each window. These numbers are critical because they’ll determine what size window you need to order.

  • Measure the window’s width from inside the trim at the top, middle and bottom.
  • Measure the height of the window from inside the trim on each side. Make a note of the shortest measurement.
  • Use the level to make sure the windowsill is level. Note how much it slopes and in which direction if it’s not.
  • When ordering for a window, remember to consider the most diminutive height and width measurements to get the right size.

Remove the Old Window

Once you have measured your window, the next step would be to remove the old window.

  • Start by removing any blinds or curtains that are in the way.
  • Remove the stops—the pieces of wood that hold the window in place. You can do this by prying them off with a putty knife or flat head screwdriver.
  • Take out the old window sashes—part of the window holding the Glass. Next, remove the parting stop, a small piece of wood between the two belts. Repeat with the lower strap.
  • Remove any old caulk or putty from around the window with a knife.
  • Use a wire brush to remove any old paint or other debris from the surface of the window frame.

Install the New Window

The final step is to install your new window.

What you need:

  • new window
  • putty knife
  • caulk gun and caulk
  • wood shims
  • hammer
  • screwdriver or power drill


Before starting, clean the window opening to ensure no debris and dust are left.

  • Position the new window in the space, ensuring it is level and plumb.
  • Use wood shims to hold it in place while securing it with screws.
  • Start by attaching the top of the window first, then do the sides, followed by the bottom. You can use screws that are long enough to go through both layers of the window frame but not so long that they come out the other side.
  • Once it is fully secured, add some caulk around the outside of the window to seal any gaps and prevent drafts.

Choosing the Right Window

Installing replacement windows is not as daunting of a task as it may seem. You can easily do it yourself by taking proper measurements, removing the old window, and installing the new one. Just be sure to take your time and follow the instructions.

There are many different options, so it’s essential to research and find the best one for your home. Then, with enough effort, you can have lovely new windows.

There are many factors to consider when selecting a new window, such as:

The type of window

There are different types and forms of windows. For example, you can get wood, vinyl, or aluminum frames.

  • Double-hung window. The most common type is the double-hung window with two sashes that slide up and down.
  • Casement windows. Casement windows that have a hinge on one side and open outward. This type of window is great for hard-to-reach places.
  • Bay or bow windows. Bay or bow windows are three windows joined together at an angle to create a projecting effect.
  • Awning windows. Awning windows are hinged at the top and open outward from the bottom.
  • Sliding windows. Sliding windows have one fixed sash and one that slides horizontally.

The size and shape of the window

The size and shape of your window will depend on the space you have available and the look you want to achieve.

Small windows are great for tighter spaces or a minimalistic look. Large windows can make a room feel brighter and more open. Oval, arched, or circular windows add elegance.

You can get one large window or multiple smaller ones. The number of windows you choose will depend on the amount of light you want to let in and your budget.

The material

The material of your window will affect its durability, energy efficiency, and price.

Wood windows are classic, and you can paint or stain to match the rest of your home’s exterior. They require more maintenance than other materials but can last for decades with proper care.

Vinyl windows are one of the most popular choices because they’re low-maintenance, durable, and energy-efficient. In addition, they come in a variety of colors and styles to match any home.

Fiberglass windows are strong and can withstand extreme temperatures. They’re also energy-efficient but more expensive than other materials.

Aluminum windows are lightweight, durable, and low-maintenance. They’re a good choice for homes in coastal areas because they don’t rust.

Related Page: Window glass replacement

The energy efficiency of the window

Energy-efficient windows can help you save money on your energy bills and make your home more comfortable.

Look for windows with a low U-factor and solar heat gain coefficient (SHGC). The U-factor measures how well a window insulates, and the SHGC is the amount of heat from the sun allowed into the home.

Windows with a low U-factor and SHGC will help keep your home cooler in the summer and warmer in the winter.

The price of the window

The price of your window will depend on the size, material, and energy efficiency. Wood and fiberglass windows tend to be the most expensive, while vinyl and aluminum are more budget-friendly.

Selecting the right window may not be easy, primarily if you aim to get high-quality materials and glass. Therefore, it is essential to consult with a professional window installer to get the best advice for your home.

One day Glass has offered all types of Glass for home windows. The company has a team of experts that will guide you in choosing the best fit. They can cut and customize it for you to get the correct measurement that fits perfectly.

Contact One Day Glass and get your free quotation!

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