Shade Measuring Instructions

Inside vs. Outside Mount: Which Should You Choose?

Choose Inside Mount If:

  • Your window has enough depth to accommodate the shades.
  • You want a sleek, minimalist look.
  • You prefer to highlight the window trim rather than cover it.
  • The window frame is strong enough to support the mounting hardware.
  • Your home has well-shaped, rectangular windows.
  • A protruding window sill makes outside mounting difficult.

Choose Outside Mount If:

  • Your window lacks sufficient depth for an inside mount.
  • You want to conceal unattractive trim or refresh the window’s appearance.
  • You need maximum light-blocking when the shades are drawn.
  • The window frame is too fragile or shallow to support an inside mount.
  • Privacy is a primary concern, and you want to block outside views completely.
  • You want to create the illusion of a larger or taller window.

How to Measure for an Inside Mount

1. Measure the Depth

Measure the depth at the top of the inside window casing to ensure there is enough space for an inside mount. The required depth varies by shade type—refer to the specifications for details.

2. Measure the Width

Measure across the top, middle, and bottom of the window. Use the smallest measurement, rounding down to the nearest 1/8 inch.

3. Measure the Length

Measure the left, center, and right sides of the window. Use the largest measurement, rounding up to the nearest 1/8 inch.

Deductions & Side Gaps

Manufacturers make slight width deductions to ensure a proper fit:

  • Roman, Bamboo, Roller, Zebra Shades: 3/8-inch deduction from the window frame.
  • Cellular & Venetian Shades: 1/4-inch deduction.

Shade fabric is narrower than the headrail to allow for smooth operation:

  • Roman & Bamboo Shades: Fabric width matches the ordered width.
  • Roller & Zebra Shades: Fabric is 1.5 inches narrower than the ordered width.
  • Cellular & Venetian Shades: Fabric is 1/4 inch narrower than the ordered width.

Tips for Inside Mount

  • Ensure your window has enough depth for an inside mount; otherwise, consider an outside mount.
  • Verify the strength of your window frame before drilling.

How to Measure for an Outside Mount

1. Check the Mounting Space

Measure the height above the window where the shade headrail will be mounted, ensuring there is enough room for brackets and secure installation.

2. Measure the Width

Measure the window frame from edge to edge. For better light control, add 1-2 inches on each side (total of 2-4 extra inches).

3. Measure the Length

Measure from the top to the bottom of the window frame. If possible, mount the shade 10-12 inches above the window to maximize natural light when the shade is open.

Tips for Outside Mount:

Allow Extra Space: Adding width beyond the window trim reduces light gaps and improves privacy.

Create a Larger Window Effect: Extending the blinds past the window makes the space look bigger and more elegant.

Ensure Proper Mounting Space: A minimum of 2 inches of flat surface above the window is required for secure installation.

Consider Projection Brackets: If your window frame molding obstructs the blinds, projection brackets can extend the shades outward for a better fit.