How to Build Custom Window Blinds

Building a custom window blind requires moderate handiness and sewing skills. There are several different types of custom window blinds that offer distinctively different features and require slight modifications to the general guide for making window blinds. This guide will offer the basic instructions needed to make any window blind.

Required materials

  • Slat of fabric material
  • Cord
  • Mounting bracket set
  • Blind rod

Required Tools

  • Tape measure
  • Pencil and paper
  • Drill with assorted bits
  • Screwdriver
  • Scissors
  • Coping saw

General Instructions

Measuring the window

  1. For an interior mounted window blind, measure the window and not the frame.
  2. When making the width measurement, allow for the width of the shade bracket.
  3. Always round down by an eighth or sixteenth of an inch if the measurement could go either way.

Cutting slats or fabric

  1. Use your measurements to lay out and cut the blind material. Hold it against the window to ensure correct measurement.
  2. Sand the ends and both sides of rough materials like wood.
  3. If a fabric material is being used, hem the edges.

Assembling the blind

  1. Construct a loop from the window cord, leaving a decent amount for a tail before the loop.
  2. Insert a single slat into the loop approximately 1-2” and close the loop.
  3. Leave approximately ½” of cord and construct another loop.
  4. To complete the shade portion of the blind, repeat the process for each slat on both ends.
  5. For the top slat, use a wider and slightly thicker piece of strapping and a slip knot to allow for raising and lowering the slats.
  6. For a fabric blind, staple the fabric to a window roller.

Installing the bracket mount and blind

  1. Pre drill three holes–left, right and middle–into the top board of the window box. Attach the main blind support to the top of the window frame.
  2. For a fabric blind, place the chosen mount onto the window frame and measure to the bracket allowing for the width of the rolled-up blind.
  3. Mark the screw hole locations.
  4. Pre-drill the bracket holes and then screw in the bracket screws.
  5. Place the blind into the bracket holes and test.

Pulling adjustments

  1. Whether working with a slat or fabric blind each type will require and adjustment before it can be used fully.
  2. For fabric blinds, adjust the tension of the roller by tightening its flat pin. Use caution when turning becomes more difficult, at some point, the spring inside the roller will let loose and hurt your fingers. Stop turning the pin when you foresee this occurrence.
  3. For a slat blind to be held up, tack a screw into the outside of the window frame to form a peg.

Tips and warnings

  • Visit websites to get more information of specific types of slat and fabric blinds. is an excellent place to start as they provide the guidelines for creating up to five different types of blinds.