On May 12, 4:00*am, Doc wrote:
On May 12, 3:23*am, DD_BobK wrote:

What is the dimple spacing on the prodcut you have?

Every 5" within each horizontal row, the rows are 5.5" apart and
offset.

Approx like this where each asterisk is a dimple.

*_____*_____*_____*_____*_____*_____*
___*_____*_____*_____*_____*_____*__
*_____*_____*_____*_____*_____*_____*
___*_____*_____*_____*_____*_____*__
*_____*_____*_____*_____*_____*_____*

Hmmm... if the spacing is 5.5" x 5", I wonder how it can work with
studs at 16" or 24"?

Your idea of using every other dimple would give you one fastener per
100 sq inches... good enough.

Every dimple would give you 4x as many fastener .... way more than you
need.

cheers
Bob