Project Guide

How to Measure for Plantation Shutters

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Measuring for an inside mount
  • Welcome to our shutter installation video. Please watch as we show you the correct procedure for measuring for trouble-free operation.
  • When measuring for an inside mount application, it is important to check the depth of the window before choosing a louver size. Louvers can be 2 1/2 or 3 1/2-inches wide.
  • It is important to look for any obstructions, such as locks, window cranks, latches, mullions and windows that open into the room. The frame options for inside mounts include L-frame, Z-frame, trim frame or unframed.
  • Once the appropriate louver and frame has been chosen, record these items on the order form. Check the window for squareness by measuring the diagonal points of the window, or by using a panel and placing it against all four corners. If the window is out of square by more than 3/8 inches, an outside mount application is recommended.
  • Measure the inside width of the window in three locations: top, middle and bottom. Remember to always measure the opening at the point of the window where the shutter frame will be installed.
  • Record the smallest or tightest inside measurement within 1/16 of an inch for width on the order form. Repeat the same process for measuring height. Again, measure in three places: left, center and right. Record the smallest or tightest inside measurement this time within 1/8 inch for height on the order form.
  • If the opening measures 60 inches or higher, a divider rail is required. For inside mounts, measure from the top of the window sill up to the center of where you would like the divider rail located. 2 Measuring for an outside mount
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Measuring Examples For Outside Mount Shutters
  • When measuring for an outside mount application, many of the same principles for an inside mount application apply. Similar to an inside mount application, check for window depth. The difference with an outside mount is that you can extend or build out the frame by adding depth where needed.
  • Look for any obstructions, such as locks, window cranks, latches, mullions and windows that open into the room. The frame options for outside mounts include L-frame, casing frame or mounting strip.
  • Once the appropriate louver and frame has been chosen, record these items on the order form.
  • Measure the width in three places. These measurements should be taken from the left outside edge of where the frame will be positioned to the right outside edge where the frame will be positioned. Note on an outside mount application, you have the option of placing it on top of the window trim, in place of removed trim, or on top of drywall returns.
  • Record the largest measurement within 1/16 inch of the width on the order form. The same rule applies to measuring the height. Measure in three places: left, center and right to the outside edge of where the frames will be positioned. Record the largest outside measurement this time within 1/8 inch for height on the order form.
  • When you measure for the divider rail, measurements start where the bottom of the frame will be located and go up to the center of the divider rail. Record that measurement on the order form. Divider rails must be used on panels over 60 inches in height.
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Measuring examples for inside mount shutters
Measuring examples inside mount shutters - How  Measure Plantation Shutters

Measure the width of your window at the three positions indicated in Illustration A: top, middle and bottom. Record the narrowest width of the three.


Measure the height of your window at the three positions indicated in Illustration B: left, middle and right. Record the shortest height of the three. 

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Measuring examples for outside mount shutters
Measuring examples outside  mount shutters -  Measure Plantation Shutters

Measure the width of your window at the position indicated by Illustration C. Be sure to add at least 1 inch to both sides so that the shutters can hang properly.


If you have a sill that extends at the bottom of the window, measure height at the position indicated by Illustration D: from the top of the sill to at least 1 inch above the window.


If you do not have a window sill, measure height at the position indicated in Illustration E. Be sure to add 1 inch to the top and bottom of the height measurement so that the shutters can mount properly.