Drilling Granite

[brk-lnt]

Originally Posted by ishoot308

If it was me, I would use an epoxy anchor threaded stud of the proper size to anchor the mailbox. This will keep All pressure off the sidewalls of the hole in the granite. Expansion style anchors or “Tap Cons” exert a lot of pressure to the sidewall.

Dan

That's a good point, and part of why I recommended the lead anchors, I've had good luck with those in granite, as they handle most of the expansion issues by their own compression.

The sleeve anchors have also worked well, for me, (though I forgot to mention use epoxy with those). The sleeve anchor setup prevents you from having significant expansion in most cases.

This was also on the presumption of a 10" or so mailbox post, like you commonly see in NH. If it was something narrower, I would definitely be more cautious about expansion.