Arches (Inside Mount)

Make sure your window has enough depth for an inside mount. For more details on the specific requirements, head over to the product’s information page and click on the "Specifications" tab.

Standard Arch

Measuring the Width

• Measure only the window opening.
  
  
• To determine the width, measure from left to right at the bottom of the arch.
  
  
• Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.  (For example, if the smallest measurement is 24 9/16," round down to 24 1/2". If it's 24 3/8", no need to round down.)
  
  
• This is the width you will use when ordering.

Measuring the Height

• Measure only the window opening.
  
  
• To determine the height, divide your width in half and measure the height at that location.
  
  
• Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.  (For example, if the smallest measurement is 24 9/16," round down to 24 1/2". If it's 24 3/8", no need to round down.)
  
  
• This is the height you will use when ordering.

We’ll handle any necessary deductions based on the measurements you provide, so there’s no need to adjust your own measurements. Don’t add to the width in anticipation of deductions—we’ve got it covered. If you’re looking for more light coverage, consider an outside mount.

Please review the deduction chart below that we’ll use when making your order. You do not need to take any additional deductions.

Quarter Arches

Measuring the Width

• Only measure inside the window opening.
  
  
• To determine the width, measure from left to right at the bottom of the quarter arch.
  
  
• Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
  
  
• Use this width measurement when ordering.

Measuring the Height

• Measure only the window opening.
  
  
• To determine the height, measure at the left or right side of your window (depending on whether it is a left or right facing quarter arch). This should be the tallest portion of your window.
  
  
• Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
  
  
• This is the height measurement you will use when ordering.