an adhesive i would recommed for laying any natural stone is a new product from n&c nicobond called speed flex this product is specially designed for all stones. as for grout i would not recommend any colour other than limestone or beige i have found this to be the customers favoured choices and really compliments the colour of the stone but still gives some contrast betwen tile and grout. the grout will recieve a certain amount of protection form the sealer which needs to be applied to saturation. kept on top of it should'nt be too hard to maintain. as pawelzik advises a visual inspection of the travertine you will be using is a good idea to ensure you recieve the overall quality and finish your looking for.
