How To Measure For Window Replacement

How to Measure Your Windows Correctly for a Perfect Sash Replacement

If you’re planning a sash replacement project, getting accurate measurements is essential to ensure a perfect fit. Measuring your windows correctly not only saves you time and hassle but also helps you avoid costly mistakes. Here’s a step-by-step guide to measuring your windows accurately for sash replacement, so you get the right size and enjoy a seamless installation.

Our partners at Fenster have put together these quick tutorial videos to help you get the measurements right the first time.

Step 1: Measure the Window Width

Start by measuring the width of the window, as this will give you a clear understanding of how the sash will fit horizontally within the frame. To ensure precision, take three width measurements: at the top, middle, and bottom of the window opening. Here’s how:

1. Use a tape measure to measure from the inside of one jamb to the inside of the opposite jamb.
2. Take one measurement across the top, one across the middle, and one across the bottom.
3. Record all three measurements and use the smallest one when ordering your sash replacement. This ensures a snug fit even if there’s minor warping or inconsistencies in the frame.

Step 2: Measure the Window Height

Once you’ve recorded the width, it’s time to measure the height. This will ensure your new sash fits perfectly within the vertical space of the window frame. For the height, you’ll also need to take three measurements: on the left side, in the center, and on the right side of the window opening. Here’s how:

1. Measure from the top edge of the sill (where the sash sits) up to the head jamb (the top of the frame).
2. Take one measurement on the left side, one in the center, and one on the right side of the window.
3. Record all three measurements and use the smallest one when ordering. Using the smallest measurement accounts for any slight variations in the frame’s height and ensures a better fit.

Step 3: Measure the Depth of the Window

The depth of the window frame is another important measurement to ensure your sash fits properly. For sash replacements, you’ll need enough depth to accommodate the new sash and any necessary hardware. Here’s how to measure it:

1. Measure from the interior side of the window frame to the exterior side.
2. Make sure not to include any trim or stops in this measurement—just measure the depth of the actual frame.
3. Record this measurement, as it helps confirm that your window has sufficient space for the new sash and allows for proper operation once installed.

Step 4: Double-Check Your Measurements

Once you’ve taken all measurements for width, height, and depth, it’s essential to double-check each one. Even a small discrepancy can lead to a poor fit, so verifying your measurements helps ensure accuracy. Here’s a quick checklist for double-checking:

1. Re-measure each dimension (width, height, and depth) to confirm that your numbers match your initial measurements.
2. Make sure all measurements are recorded correctly and labeled clearly (e.g., top width, center width, left height).
3. If any measurement seems off or inconsistent, measure again to be certain.

Step 5: Use the Smallest Measurements for Ordering

Now that you’ve taken all your measurements and double-checked for accuracy, use the smallest width and height measurements when placing your sash replacement order. This ensures a more secure and precise fit, as the sash will accommodate any slight variations in the frame.

Conclusion

Measuring your windows accurately for sash replacement doesn’t have to be complicated, but it does require attention to detail. By following these steps, you’ll have all the measurements you need to order a perfectly fitting sash that will restore the beauty and functionality of your window. If you’re ever uncertain, don’t hesitate to reach out for professional assistance to ensure a seamless replacement process.

Contact Us for Expert Help! At ReWindow, we’re here to help with all your window repair and replacement needs. If you need guidance on measuring or would like professional assistance with your sash replacement, contact us today! We’ll make sure your project goes smoothly from start to finish.