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How to Measure for Angle Top Windows

Tips Before You Get Started

  • Use a steel tape measure for the most accurate measurements
  • If you’re considering an Inside Mount, make sure your window has enough depth to accommodate it
  • Always measure width (left to right) first and height (top to bottom) second
  • Record all measurements to the closest 1/8”, making sure to clearly identify which is your height and which is your width—it is very common to get them mixed up

Determine Inside Mount or Outside Mount

  • Inside mount shades will hang entirely within the window frame
    • We recommend inside mount whenever possible
    • Neat, streamlined look
    • Usually best for energy efficiency
  • Outside mount shades will hang outside your window opening, overlapping the edges
    • We recommend outside mount for out-of-square windows, and for windows with minimal mounting depth or obstructions within the frame
    • Minimizes light gaps, giving you better light control and privacy

Measuring for Inside Mount

Note: Inside mount shades will have a small deduction automatically applied by the manufacturer, to ensure proper fit

Width

  • Measure at the depth within the frame where you’ll install your brackets
  • Measure width at the top, center and bottom of the rectangular portion of your window opening; you will not take any measurements from the angled portion for this step
  • Record the smallest measurement to the closest 1/8”

Height

  • Measure the height of the “tall side” of the window opening, from the bottom edge to the top corner of the angled portion
  • Record this measurement (to the closest 1/8”) as your height

Short Side Height

  • Measure the height of the “short side” of the window opening, from the bottom edge to right where the angle starts
  • Record this measurement (to the closest â…›”) as your “short side height”

Angle Length

  • Measure the length of the angled line, from right where the angled portion of the window begins to its top corner
  • Record this measurement (to the closest 1/8”) as your “angle length”

Measuring for Outside Mount

Note: Outside mount shades will have no deductions taken at the factory. They will be made according to your exact measurements.

Width

  • Measure the area you want to cover (how far you want the blind to overlap the window opening); we recommend 6” on both sides
  • Record your measurement

Height

  • Determine where you want the top corner of the “tall side” of your shade to be; mark this spot
  • Measure the height from the spot you marked to the top of the window sill. If there is no sill, measure the entire length you want covered
  • Record this measurement as your height

Short Side Height

  • Determine where you want the “short side” of your shade to end; mark this spot
  • Measure the height from the spot you marked to the top of the window sill. If there is no sill, measure the entire length you want covered
  • Record this measurement as your “short side height”

Angle Length

  • Measure the length of the angled line, connecting the spot you marked for the short side of your shade to the spot your marked from the tall side
  • Record this measurement as your “angle length”