My house curently has T1-11 siding over celatex. What I would like to do is install fiber cement siding. Some folks tell me that I should just go over the T1-11. My gut feeling is that if I want to do it right that I should remove the old siding, install a vapor wrap and then side with the fiber cement. It does represent a lot more work but I don't want the job to look like a typical 'home owner's' project. Most of all I want it to be right. Any opinions or suggestions????????