Hopefully next week will be starting to lay 24s qm of classic honed and filled travertine 610mm x 406mm 12mm thick on the walls and floor with a mosaic border in my bathroom but unsure about a few things. Which is the best pattern! I originally was going to do brick bond with 2mm spacers but have read it's more difficult with large tiles. Next the impregnator is ltp mattstone a good product, its much cheaper than lithofin stainstop. I have read that some seal before laying then again after grouting and some seal after laying then again after grouting which is best. How much impregnator will I need! I thought might as well get 5 ltrs. Lastly the grout, I know it personal preference but which colour suits classic best. Can I use wall grout for the floor tiles as wont need much so there would be a lot left over if I bought a 5kg bag, theres only about 3.5sqm of floor once the shower and baths in. Do I have to use larger spacers on the floor, its constructed of 25mm marine ply sat on 8"x3" joists with loads of extra noggins in between and there is very little if any flex.