Slate tiles

[Leatherface]

Also - don't try & use spaces - do it by eye.
If you find some of the slates have a bit of lipping on the edges after laying, you can very carefully chip these off with a hammer and chisel - state is composed of many layers. In my opinion no need to seal prior to setting. Wash with 2 or 3 changes of water then allow to dry thoroughly before sealing. Advise at least 2 coats of sealer with at least 6 hours inbetween coats. Then 24 hours before grout. Use a washboy and also a normal sponge and wipe any ridges on the tiles carefully - the grout tends to stick there although you cannot see it until dry.
Try lithofin or LTP sealers -they are very good
I will post a pic of one of my recent jobs in the gallery

 

[trevortine]

Hardly ever seen slate thats accurately calibrated, always comes uncalibrated, i always seal it first too, lucky to have an 8.5m by 5m garage! Lay them out then of you go. Always find the same with a lot of floor tiles. I do most of my floors by eye and very rarely use spacers on them. As previously mentioned time you get a few runs down the spacers can throw you off.