In article , The Natural Philosopher
wrote:

Or, as in my case, mae a 6:1 sand cement mixture and brush in to the
gaps. tamp down hard.

It goes off eventually.

That sounds like a good idea. I thought of regrouting with sand on my
slabs but being a biologist I realised it wouldn't take long for the
sand to become an ideal growing mix. But with cement it would take a lot
longer.

How hard would it be to scrape this out and redo after a few years?

Peter

--
Peter Ashby
School of Life Sciences, University of Dundee, Scotland
To assume that I speak for the University of Dundee is to be deluded.
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