Professional Measurement Guides for Custom Blinds
The secret to designer-quality window treatments is a perfect fit. Whether you are installing sleek zebra blinds or energy-efficient honeycomb shades, our expert measurement guides ensure your custom order is accurate to the millimeter. Follow our proven three-step process to eliminate guesswork and guarantee a flawless installation.
The Science of a Perfect Fit
In the world of custom window coverings, "close enough" isn't good enough. Precise measurements are essential for light control, privacy, and thermal efficiency. A blind that is too narrow leaves unsightly light gaps, while one that is too wide will rub against the window casing, causing premature wear on the fabric and motor. By following our guides, you are ensuring that your investment in Winlor quality looks and performs exactly as intended for years to come.
The Professional’s Toolkit
To achieve factory-level accuracy, you need the right equipment. Do not use cloth measuring tapes or rulers, as these can sag or provide inconsistent readings.
- Steel Tape Measure: A high-quality metal tape is non-negotiable for precision.
- Step Ladder: Always measure at eye level to ensure the tape is perfectly straight.
- Pencil & Notepad: Or use our Printable Measurement Worksheet.
- Laser Distance Measurer (Optional): Ideal for high-ceiling executive windows.
Step 1: Choose Your Mounting Style
Before you pull out the tape measure, you must decide how your blinds will be mounted. This choice significantly impacts your final measurements.
Inside Mount
The blind is installed inside the window casing. This provides a clean, integrated look that showcases your window trim.
Best For: Modern aesthetics, deep windows, and homes with decorative molding.
Outside Mount
The blind is installed on the wall or the window molding itself, covering the entire window opening.
Best For: Shallow windows, blocking out maximum light, or hiding unattractive window frames.
Step 2: Taking the Measurements
How to Measure for Inside Mount
Windows are rarely perfectly square. To account for slight shifts in your home's structure, follow the "Rule of Three":
- Width: Measure the inside width at the Top, Middle, and Bottom. Circle the narrowest of the three measurements. This is the width you will provide to us. (We will make a small deduction at the factory to ensure smooth operation).
- Height: Measure the inside height at the Left, Middle, and Right. Circle the tallest measurement. This ensures the blind reaches the windowsill.
- Depth: Measure the depth of your window casing. Check our product-specific catalogs to ensure your window is deep enough for the headrail (standard is typically 2.5 to 3 inches).
How to Measure for Outside Mount
When measuring for an outside mount, you are in control of the coverage:
- Width: Measure the width of the area you want to cover. We recommend adding at least 2 inches on each side (4 inches total) to minimize light leakage.
- Height: Measure the height from where the top of the blind will be placed down to the windowsill (or lower if you want to cover the trim).
Pro Tips for Flawless Accuracy
- Don't Deduct Yourself: For inside mounts, provide us with the exact window opening size. Our factory software calculates the necessary deductions for the brackets and moving parts.
- Check for Obstructions: Look for window cranks, handles, or alarm sensors that might interfere with the blind's path.
- Diagonal Check: Measure the window diagonally from corner to corner. If the two diagonal measurements are more than 1/2 inch apart, your window is "out of square," and an outside mount might be a better aesthetic choice.
Product-Specific PDF Guides
Different products have different mounting requirements. Download the specific guide for your chosen style:
Too Nervous to Measure Yourself?
We get it—measuring for an entire house can be stressful. Let the experts handle it. If you are located in the GTA, Milton, Oakville, Vaughan, or Orangeville, we offer Free Professional Measurement Services with every consultation.
Our technicians use professional-grade laser tools and take full responsibility for the fit. If we measure it, we guarantee it fits.