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How to Measure & Install Vertical Blinds

Things to Remember:

  • Use a steel tape for accuracy.
  • Measure Width and write it down, then Length and write it down.
  • Measure to the nearest 1/8 inch.
  • Do not take your own deductions. The factory will take necessary deductions and allowances.
  • Double check all measurements.
  • NOTE: All measurements should come from measuring the window. If you measure your existing blinds, the measurements will be incorrect.

Inside Mount Installation

To find width:
Measure the opening across the top where the headrail is to be installed from inside of jamb on left to inside of jamb on right. Record the exact measurement to 1/8″.

To find length:
Measure from the inside top of the opening on the left, at the center, and on the right to the sill; record the measurement to the nearest 1/8”. Do not make any allowances; the factory will make all adjustments so the headrail will fit the opening properly and the vanes will clear the sill by 1/4″ to 1/2″.

Outside Mount Installation

To find width:
Measure the width of the area to be covered at the place where the headrail will be installed to the nearest 1/8″. Blind should overlap opening at least 4″ on each side to ensure privacy.

To find length:
Measure the length of the area to be covered and record to the nearest 1/8″. Blind should extend at least 3″ above and 3″ below opening or window molding. For ceiling-to-floor installations, make adequate allowance for carpeting. Specifying “OB” measurement means the factory makes no deduction allowances.

Patio Doors

To find width:
Measure the width of the area to be covered at the place where the headrail will be installed to the nearest 1/8″. Blind should overlap opening at least 4″ on each side to ensure privacy.

To find length:
Measure the length of the area to be covered and record to the nearest 1/8″. Blind should extend at least 3″ above opening or window molding. For ceiling-to-floor installations, deduct 1/2″ for proper clearance. Specifying “OB” measurement means the factory makes no deduction allowances. To ensure easy access through the door and allow adequate overlap, consider the stack width.

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