On May 14, 12:25*pm, Oren wrote:
On Tue, 14 May 2013 11:01:03 -0700 (PDT), Harry K
wrote:

No, after the foundation is level there is no need for a string.
Those blocks are laid dry with no mortar to level them.

Harry K

I'd still have handy level to check the plumb.

Just in case, a string level:

http://gorambling.com/images/building_stuff/tools/string_line_level.jpg

Do you _really_ think that I and the others in this forum don't know
about a string level?

The "level" and "plumb" are built into the blocks. Unless you start
adding mortar or sand while laying them, there is no adjustment you
can make. Get your foundation level and go.

Harry K