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Trapezoid Roman Shade

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Many contemporary homes have large windows that angle along the roof line at the top. These trapezoid windows can be covered with a Roman shade. Look at the two photographs below and you will see how the shade works. The shade is made to fit the window completely when down. The mounting board follows the angled line of the top of the window. Read this page for instructions on how to make a Roman shade that fits a trapezoid window.


Elizabeth DeNoble, Copyright 2007


TrapezoidPieced

The shade still lifts and lowers into horizontal folds. When fully raised, it can only be pulled up to the lower part of the angle. The entire top portion of the window will be covered even when the shade is raised. You can use the Hardware Calculator by making the following modification: 

  • Finished Shade Width - width of shade at bottom

  • Finished Shade Length - shortest length of shade

  • Ideal stackage = how long the shade shange down from the bottom of the angled-top.

In the photograph at the left, the Finished Shade Length is measured on the left-hand side of the shade.

TrapPiecedUp In the photograph at the left, the Stackage is the folded up portion below the angled-top.


The mounting board is made as shown in the drawing below.

You can also use this technique to cover an arched window. Home Stores sometimes sell a plastic strip that is notched on one side so that it can be curved. The strip already has the hook Velcro on it. You make a cardboard or Kraft-paper template of the top of the window. Cut a piece of plywood using the template and the staple the Velcro along the top edge.