Ive been watching Holmes on Homes and they use a system inside called a Waterproof Drainage Membrane..

I have a situation where I might need some more info about it and tried to get a price at Lowe's and HD... with NO luck finding it. Holmes on Homes is a Canadian series so they might be saying it differently than we do in the US.

Does someone know of a product similar at Lowed or HD? Below is a picture of what it might look like...

http://www.1st-product.com/uploads/20/7951/drain-board-28.jpg (http://www.safeguardeurope.com/images/oldroyd_xv_20.jpg)
http://www.safeguardeurope.com/images/oldroyd_xv_20.jpg