A Step-By-Step Guide to Casement Window Replacement

Casement Windows Replacement, MI Windows and Doors

Installing casement windows yourself isn't for everyone. It involves risks such as damaging the window, your house, or even injuring yourself. However, for those willing to take on the challenge, it can be an opportunity to acquire a new skill and save significantly on labor costs. Below is a step-by-step guide to casement window replacement.


What Are Casement Windows?

Casement windows, also called crank windows, open with a crank handle. The handle is turned, which causes the arm to extend and contract. That creates a swinging motion to open and close the window, rather than sliding up and down. Available in various sizes and colors, they can complement numerous home decor styles.

Casement windows have a timeless appeal. They've consistently been a popular choice and are experiencing a resurgence in the industry. Over the years, casement windows have taken on a multitude of styles while always staying true to their roots. 

Casement Window Parts

Understanding the parts of a window ensures a successful installation. Exterior casement windows include: 

  • Glass panes made of double- or triple-paned glass for better insulation and energy efficiency
  • A frame consisting of sill (base), head (top), and jambs (sides)
  • The mechanism to open the window: an operator arm and crank handle 

The operator arm connects to either the left- or right-hand side, depending on which side you decide to have your window open to. If you’re opting for a double casement window replacement, it may operate from a single crank handle or have one on each side of the window. 


Finding the Best Casement Window Replacements

Not all casement windows are created equal. The first thing to consider is the casement window replacement cost. Some companies charge substantially more for crank windows than others even though they may come from the same manufacturing location, so do your research. 

Also think about the window's operational side and how it fits with your home's design. For example, casement windows typically open toward the usual direction of the wind, to capture the breeze. Or, you might want to set the hinged side of the window closest to the corner of the room to make the design more streamlined. Detailed planning saves time and money from the start.

Look for options that blend style with ease of use, like the sleek, efficient Restoration Series V5500 from MI® Windows and Doors. With an easy-to-use and energy-efficient design, these crank window replacements also come with a strong warranty, ensuring you get both form and function.


How to Install Replacement Casement Windows

Replacing casement windows is challenging, and we recommend leaving it to a professional. If you must tackle it yourself, always prioritize safety and closely follow these guidelines.

Step 1: Measure

You'll need a standard metal tape measure. Measure the height from the exterior of your home, at three points: both sides and the middle. Then, measure the exterior width at the top, middle, and bottom. Finally, go inside and open the window. Measure the depth at these same points and note the smallest measurements to ensure a snug fit for your new windows. You now have the dimensions you will need when ordering new windows. 

Step 2: Gather Your Tools

To install your casement window replacement, you will need a few tools:

  • New window
  • Caulk gun
  • Tape measure
  • Shims
  • Level
  • Hammer/rubber mallet
  • Screwdriver
  • Drill 
  • Pry bar
  • Putty knife
  • Level
  • Insulation

Step 3: Remove the Old Window

To begin, carefully remove the screws in the existing window. Use the mallet to wedge the pry bar into each side of the exterior casement window and detach it from the house. Take care not to damage surrounding areas. Repeat this process on all sides until you can easily remove the old window. 

Before moving to the next step, check and repair any damage in the window's vicinity. Clean the area thoroughly to remove debris, old caulk, and paint.Step 4: Install the Frame

After you’ve repaired damage and cleaned the area, you can begin installing the frame. Ensure the frame is both horizontally and vertically level (called “plumb”), and use shims on at least two sides to provide stability. Create lead holes to guide your screws, then insert the screws and mount the frame into the house. 

Apply insulation between the frame and wall, then caulk around the frame. Smooth the caulk with a putty knife. Go inside the house and repeat until your window has an airtight seal.

Step 5: Install the Glass

Follow the manufacturer’s instructions to install the glass accurately and safely into the frame. Make sure to install the operator arm and crank handle in the correct position, and ensure the window operates smoothly and is properly sealed. 


Need Help With Casement Window Replacement?

Casement window replacement is not an easy task. In addition to safety concerns, you’ll be left with old glass windows to dispose of. Instead of doing it yourself, we always recommend using a professional with experience replacing casement windows. Another benefit: They can help you find the perfect window for your needs. Ready to shop? Check out our casement window options, then find a trusted partner to help you replace your windows.

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