Page Wrap IDs

Hello:

I have a site where the home page has a 3 column layout and the single, post and archive pages are 2 column with a “sticky footer”. I want the right column to be a “faux column” but since I am using a sticky footer it does not extend to the bottom of the page. I can create a “faux column” on the “page-wrapper” in my css, but it also shows up on my home page. Is there a way I can use a Conditional Tag to assign a specific page wrapper id to a page? I am sure that it can be done but I am not sure how to approach it. I am also open to suggestions if there is a better way to go about it. Thanks!