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Editorial automation guide
How to measure shutter louvers and panels
Measure louver width, panel height and width, frame depth, clearance and the number of independently moving panels. Take repeated measurements and follow the final supplier instructions.

Quick answer
Measure louver width, panel height and width, frame depth, clearance and the number of independently moving panels. Take repeated measurements and follow the final supplier instructions.
Published and reviewed: 2026-08-06 · By Shades, Shutters or Blinds? Editorial Team.
Step 1
Measure the louvers
Record the approximate louver width and note whether the louvers are uniform. Avoid relying on a single visible slat if the panel has decorative or specialty sections.
Step 2
Measure the panels and frame
Count panels, record each panel’s height and width, and note frame depth, hinge side, handle position and panel swing.
Step 3
Measure the clearance
Photograph and measure the space near the tilt control, adjacent trim and behind the open panel. These dimensions can determine whether a retrofit device has a safe mounting area.

Original project-owned diagram. It explains the mechanism conceptually; it is not an installation instruction.
Decision framework
- Identify the physical motion.
- Measure the opening, mechanism and clearance.
- Check power, manual fallback and control ecosystem.
- Verify the exact product or request compatibility review.
Common questions
Do I need exact measurements for a preliminary result?
Approximate measurements can start a review; final installation still needs exact instructions.
Should I remove a panel to measure?
Only if the manufacturer or installer specifically instructs you to do so safely.
Supporting sources
Each source is scoped to the statement it supports. Manufacturer documentation reports what its publisher states; it is not presented as independent certification.
Norman Window Fashions: Installation Instructions and Manuals (manufacturer-document-index; scope: Official installation and product-manual index, including PerfectTilt G4 materials; retrieved 2026-08-06)