Window Depth Requirements

By Coverly Shutters

The follow table displays the necessary window depth to inside mount each shutter frame with a coordinating louver size.

Please Note: These depth requirements are for a hidden tilt shutter.

A standard tilt shutter requires 1/4" less depth.

Painted Wood
2 ½” Louver
3 ½” Louver
4 ½” Louver
L Frame
2 ¼”
3”
3 ½”
Z Flat Frame
1 ¼”
2”
2 ½”
 Z Elegance Frame
1 ⅜” 
2 ⅛”
2 ⅝”
Z Deco Frame
1 ⅜” 
2 ⅛"
2 ⅝”
 
Composite Wood
3 ½” Louver
4 ½” Louver
L Frame
2 ½”
3 ½”
Z Flat Frame
1 ¾”
2 ¾”
 Z Elegance Frame
1 ⅝”
2 ⅛”
Z Trim Frame
1 ⅝”
2 ⅛”
 

The required clearance to assure the louvers can tilt without issue for an outside mount frame depends on the product:

  • Composite Wood: 2" required clearance
  • Painted/Stained Wood: 1 ½”   required clearance

If you are mounting outside of molding and do not meet the clearance requirements, we will "build out" the frame to extend past the obstruction/molding and allow full operation of the shutter. We will be able to see this in the photo uploaded during the design process and add it to the manufacturing process. We will notify you if this is needed for your window.