I've used Richard Stacey real stone to clad the front and grouted inbetween the stones with mortar mix. It looks very realistic as you can see.
The roof has been covered with pantile strips which I painted with different shades of acrylic paint to get a weathered appearance. The pantile strips are made from mdf and are very effective. It was a little tricky cutting them to shape on this hipped roof but the result is quite good I think.