Measuring Perforated Grilles

Measure to determine your Opening Size: C = Top to Bottom (Opening Width) and D = Left to Right (Opening Length). Determine your Overall Grille Size: A = Grille Top to Bottom (Grille Width) and B = Grille Left to Right (Grille Length) and specify your desired Border Width E and F. It is recommended to specify a large enough border to completely cover your rough opening. Our fabrication specialists can assist you in determining the perfect fit for your project.

Measurements should match the width and length of your desired finished piece. It is recommended to allow for clearance when using stiffeners. NOTE: Grilles are manufactured to the size given, and WILL NOT be automatically undersized.

  1. Measure the INSIDE of your opening: Width (C) and Length (D)
  2. Determine your desired Grille Width (A) and Grille Length (B)
  3. Determine your desired Border Width (E) and (F). Note that border size is critical so unfinished opening edges are not visible throught the grille pattern.
  4. Choose your Pattern Style and Pattern Size/Dimension
  5. Choose Method of Fastening (Screw Holes*, Stiffeners, Angle)
  6. Choose Material Thickness
  7. Choose Material and Finish

NOTE: Screw Holes are only provided if requesting mountings #601, #602 or #605. Holes are placed .375” off edge of hole center UNLESS specified. Notify you estimator of specific screw hole layout requirements.


 Download Perforated Grilles Measurement Guidelines PDF

For additional installation information please contact a sales person at 800-387-6267.