When it comes to installing Milgard windows, understanding the rough opening sizes is crucial for a perfect fit and optimal performance. This guide will walk you through the various Milgard window rough opening sizes, ensuring you get it right the first time.
Understanding Rough Opening Sizes
Rough opening sizes refer to the dimensions of the space in your wall where the window will be installed. It's essential to ensure these dimensions are slightly larger than the window's actual size to accommodate the window frame and allow for easy installation.
Milgard Window Sizes
Milgard offers a wide range of window styles and sizes to suit different architectural needs. Here's a breakdown of the rough opening sizes for some of their most popular window styles:

Double Hung Windows
Milgard's double hung windows come in various sizes, with rough opening dimensions typically ranging from 33" to 79" in width and 36" to 72" in height. Here are a few examples:
- 36" x 54" - Rough opening: 38" x 56"
- 48" x 72" - Rough opening: 50" x 74"
- 60" x 72" - Rough opening: 62" x 74"
Casement Windows
Casement windows from Milgard range from 24" to 60" in width and 24" to 72" in height. The rough opening sizes are usually 2" wider and 2" taller than the window's actual dimensions. For instance:
- 36" x 60" - Rough opening: 38" x 62"
- 48" x 72" - Rough opening: 50" x 74"
- 60" x 72" - Rough opening: 62" x 74"
Sliding Windows
Milgard's sliding windows are available in widths ranging from 36" to 96" and heights from 24" to 72". The rough opening sizes are typically 2" wider and the same height as the window. Here are a few examples:

- 48" x 72" - Rough opening: 50" x 72"
- 72" x 72" - Rough opening: 74" x 72"
- 96" x 72" - Rough opening: 98" x 72"
Specialty Shapes and Sizes
Milgard also offers specialty shape and size windows, which can be custom made to fit your specific needs. The rough opening sizes for these windows will vary depending on the window's dimensions and shape.
Tips for Measuring and Installing
When measuring for your Milgard window rough opening, always add an extra 1/2" to 1" to account for shims and adjustments during installation. Additionally, ensure the rough opening is square and the framing is sturdy to support the window's weight.
If you're unsure about the rough opening sizes or need assistance with installation, don't hesitate to contact Milgard's customer service or consult with a professional installer. They can provide guidance tailored to your specific window and installation needs.