Martin wrote:

"The Natural Philosopher" wrote in message
...

Martin wrote:


Help!
There has been some confusion over whether we can seal our slate tiles

as

our screed has been only laid for 5 days, would it really be a problem
sealing the tiles as we can't grout till the tiles are sealed/stain

stopped.

What problems would be encountered if we seal it and the screed hasn't
dried????



None.

Screed sets as much as dries.

Slate is more or less impervious anyway. The grout will slowly leak
moisture out, even if 'waterproofed'

Nothing will be harmed by having a higher floor moisture content under a
semi-impervious layer, for a year or two till it all equalises


what is equalising???



Sorry - mean that the screed and the room humidity levels reach equilibrium.

Look never mind the damp under the slate. Its probably a Good Thing to
slow the drying out of the screed anyway. The greatest danger is laying
slate over an unstable structure. Or getting staining on the slate due
to damp migrating upwards. But I doubt that.

I reckon you will get way with it, but, as I said last post, maybe delay
teh grouting a few weeks in case a slate comes unstuck, or cracks.