Your State may have specific requirements for spacing between anchors, depending on various factors including:

• type of fasteners,
• building structure,
• location and size of the opening
• mean roof height,
• historic wind patterns in your region. 

If your state does not have specific requirements, please default to the Florida specifications for a safe and secure installation.  You can refer to the website for the Florida Building Code (www.floridabuilding.org).  At that site, follow the Product Approval link to search for Diamond Screen (approval #FL8472); click on the link for Installation Details to view the anchor schedules and other factors related to grommet spacing.

Alternatively, you can click here to download a .pdf file of the tables and charts related to grommet spacing. 

Where the anchor schedules refer to the "span" measurement, they are referring to the dimension that is not anchored (not grommeted):

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