DrBlueBob
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- Joined
- 3 Jul 2008
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Use sharp sand. Soft sand has round particles, whereas sharp (or builders sand) has irregular size and shape which cling to each other.I am laying slabs onto a concrete base. The flags just wont stick using a 1-4 mixture of cement to soft sand. Anyone had any similar experiences or solutions? At the moment I have four different flags drying out with different mixtures to see what WILL work, but not confident at the moment.
I tend to wet the flags if they are bit dusty. Possibly try an additive in the sand/cement mix.