Installing Milgard Windows can be an exciting home improvement project, but like all tasks, it requires the right knowledge and tools. Thankfully, Milgard designs its windows with the user in mind, ensuring a seamless and straightforward installation process. In this guide, we’ll walk you through the essentials of getting your new Milgard Windows up and perfectly aligned.

1. Pre-Installation Checklist
Tools & Materials Needed:
- Tape measure
- Level
- Hammer and nails/screws
- Utility knife
- Caulking gun and caulk
- Shims
- Safety goggles and gloves
2. Measure the Opening
Before you start, it’s essential to measure the window opening accurately. This ensures the new Milgard Window fits perfectly. Measure the width at the top, middle, and bottom of the opening, and the height on both the left and right sides. Use the smallest measurements for both dimensions to select your window size.
3. Prepare the Opening
Ensure the window opening is clean, free from debris, and is structurally sound. Remove any old nails, screws, or any protruding elements that could obstruct the new window’s placement.
4. Dry Fit the Window
Before securing it, place the window in the opening to ensure it fits correctly. There should be a small gap around the window frame, which will be filled with shims later for a precise fit.
5. Apply a Weatherproofing Membrane
Before placing the window in the opening, apply a waterproofing membrane or a strip of flashing at the bottom of the window opening. This will help prevent water infiltration.
6. Place and Level the Window
Set the window in the opening, ensuring it’s centered. Use a level to make sure it’s both horizontally and vertically aligned. Once the window is level, temporarily secure it in place with a couple of nails or screws in the corners.
7. Shim the Window
Use shims to fill any gaps between the window frame and the opening. This will ensure the window is perfectly square and prevents it from warping over time.
8. Secure the Window
Once shimmed to satisfaction, securely nail or screw the window in place. Make sure to fasten through the window’s jamb, not through the frame, to avoid damaging the window’s operation.
9. Seal the Edges
Using a caulking gun, apply a bead of high-quality, waterproof caulk around the window’s perimeter, ensuring a watertight seal. Make sure to caulk both the interior and exterior edges.
10. Insulate if Necessary
If there are significant gaps between the window frame and the wall, you may need to use insulation to prevent drafts. Spray foam insulation designed for windows and doors can be used for this purpose.
11. Install Window Trims and Finishings
Depending on your design preferences, you might want to add trims or other finishings around your Milgard Window. Make sure they are securely attached and caulked to prevent water and air infiltration.
12. Clean Up and Enjoy
Remove any stickers from the window, clean the glass with a soft cloth and window cleaner, and you’re done!
Conclusion
Installing Milgard Windows doesn’t have to be an intimidating process. With the right tools, a bit of patience, and by following this step-by-step guide, you can achieve a professional-looking installation. Remember, a proper installation is crucial to ensuring the longevity and optimal performance of your windows. Happy installing!