wrote in message
...
On Sat, 28 May 2005 00:08:15 +0100, "andrewpreece"
wrote:


Sharp sand has angular grains, less gradation, and I believe makes a
stronger
mortar, but it won't handle well or have the range of adjustment that
soft-sand

Is there any reason why graded crushed glass couldn't be used in
admixture with sharp sand?

It is for insulating renders on houses needing a breathable insulating layer
outside.