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Master the Art of Measuring Windows for Treatments

Measuring windows accurately is the first and most crucial step when planning to install window treatments. Whether you are choosing blinds, shades, or curtains, precise measurements ensure a perfect fit, enhance the room’s aesthetics, and improve functionality. This guide will walk you through the essential steps and tips to master the art of measuring windows for treatments.


Why Accurate Measuring Windows for Treatments Matters


Getting the right measurements is more than just a formality. It affects how your window treatments look and perform. If the measurements are off, you might end up with blinds that don’t cover the window properly or curtains that hang awkwardly. This can lead to light leaks, privacy issues, and even increased energy costs.


Here are some reasons why measuring windows for treatments accurately is important:


  • Perfect fit: Ensures the treatment covers the window fully without gaps.

  • Smooth operation: Prevents blinds or shades from getting stuck or rubbing against the frame.

  • Aesthetic appeal: Creates a clean, tailored look that complements your room.

  • Energy efficiency: Properly fitted treatments help insulate your home.

  • Cost savings: Avoids the expense of returns or custom adjustments.


Before you start measuring, gather the right tools: a steel tape measure, a pencil, paper, and a ladder if your windows are high.


Close-up view of a tape measure on a window frame
Measuring window frame with tape measure

Step-by-Step Guide to Measuring Windows for Treatments


Measuring windows for treatments involves understanding the type of mount you want and taking precise measurements of width and height. There are two main mounting options:


  • Inside mount: The treatment fits inside the window frame for a clean, built-in look.

  • Outside mount: The treatment covers the window and frame, often making the window appear larger.


Measuring for Inside Mount


  1. Measure the width: Take three measurements across the inside of the window frame - top, middle, and bottom. Use the narrowest measurement to ensure the treatment fits.

  2. Measure the height: Measure from the top inside edge of the frame to the window sill or bottom edge. Take measurements on the left, center, and right, then use the longest measurement.

  3. Depth check: Verify the window frame depth to ensure the treatment will fit inside without obstruction.


Measuring for Outside Mount


  1. Measure the width: Decide how much overlap you want on each side of the window frame (usually 1.5 to 3 inches). Add this to the window width.

  2. Measure the height: Measure from the top of where you want the treatment to start (above the frame) to where you want it to end (below the sill or window edge).

  3. Mark the placement: Consider any obstructions like window handles or trim.


Tips for Accurate Measuring


  • Use a steel tape measure for precision.

  • Record all measurements in inches.

  • Double-check each measurement.

  • Write down measurements clearly and label them.

  • Avoid rounding up or down excessively.


Eye-level view of a person measuring window width with a tape measure
Measuring window width for treatment installation

How to measure for 3 blinds in one window?


Sometimes, a large window is divided into three sections, and you may want to install three separate blinds. This setup allows for more control over light and privacy but requires careful measuring.


Steps to Measure for 3 Blinds


  1. Measure the total width: Measure the entire width of the window from edge to edge.

  2. Divide the window: Determine the width of each section where the blinds will be installed. Usually, the window is divided into three equal parts, but adjust if the sections are uneven.

  3. Measure each section’s width: Measure the inside width of each section separately. Use the narrowest measurement for each.

  4. Measure the height: Measure the height of the window frame or each section if they differ.

  5. Account for gaps: Leave a small gap (about 1/8 inch) between each blind to prevent overlap and allow smooth operation.


Additional Considerations


  • Confirm if the blinds will be inside or outside mounted for each section.

  • Check for any window hardware that might interfere with the blinds.

  • Label each measurement clearly to avoid confusion during ordering.


This method ensures each blind fits perfectly within its section, providing a neat and functional window treatment.


High angle view of three window sections with measuring tape
Measuring three window sections for individual blinds

Common Mistakes to Avoid When Measuring Windows


Even small errors can cause big problems when installing window treatments. Here are some common mistakes and how to avoid them:


  • Not measuring multiple points: Windows are rarely perfectly square. Always measure width and height in three places.

  • Ignoring window depth: Some treatments require a minimum depth to fit inside the frame.

  • Rounding measurements incorrectly: Always use the exact measurement or follow the manufacturer’s rounding guidelines.

  • Not considering obstructions: Handles, locks, or trim can affect the fit and operation.

  • Mixing up inside and outside mount measurements: Each requires different measuring techniques.


By avoiding these mistakes, you can save time, money, and frustration.


How to Use Your Measurements When Ordering Window Treatments


Once you have your measurements, it’s time to order your window treatments. Here are some tips to ensure a smooth process:


  • Double-check your numbers: Review your measurements before submitting.

  • Specify mount type: Clearly indicate inside or outside mount.

  • Include any special instructions: For example, if you want the blinds to cover a radiator or avoid a light switch.

  • Consult with professionals: If unsure, many companies offer consultation services to verify your measurements.

  • Use trusted suppliers: Choose companies with good reviews and clear measurement guidelines.


If you want expert help, consider services like window treatment measurement to get professional assistance.


Final Tips for Perfect Window Treatment Installation


  • Prepare your space: Clean the window area and remove old treatments.

  • Gather tools: Have a drill, level, screwdriver, and anchors ready.

  • Follow instructions: Each product may have specific installation steps.

  • Ask for help: Some installations are easier with two people.

  • Test operation: Open and close the treatments to ensure smooth function.


By mastering the art of measuring windows for treatments, you set the foundation for beautiful, functional, and long-lasting window coverings that enhance your home.



Measuring windows for treatments might seem daunting at first, but with the right approach and attention to detail, it becomes a straightforward task. Accurate measurements lead to treatments that fit perfectly, look great, and perform well. Use this guide as your go-to resource for all your window treatment projects.

 
 
 

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