Quezada Architecture Hmmm... I don't remember the exact color but it was a grey black grout pretty much the same color as the tile. It just look lighter in the photo.

Quezada Architecture Thank you for the nice compliment. The tiles are actually all the same size but what is making them look different sizes is the fact that there are stairs in the foreground. The tiles are 16 x 16 black slate which is one of the more uniformly thick slates. Some slates have a lot of cleft but this one is pretty smooth which is easier to work with for the tiny grout joints. The reason why grout joints are usually bigger is because it is much easier to install that way (read much cheaper as well). I don't think you need it for expansion... our joints are tiny and never had any issues. Hope that helps!

Quezada Architecture We bought the slate from American Slate Company. They have a showroom in San Francisco and locally for easy pick up. Not sure if they are a national company but I know they have several locations in the SF bay area.

MarbleWarehouse.com The floor is Brazilian black slate natural cleft which is very dense and does not flake.

Becky Harris My guess is a slate floor and cedar or teak walls, I'm going to go check the interview and see if they told us...