And if you searched the forum and looked around, you would find out that people who put WordPress inside of an iframe think they are doing something cool, but in fact, they aren't. Few search engines go into iframes, and many, many viewers HATE them. They make more work for viewing web pages.
Think this through before investing energy in this. It's a lot of work, can hide a lot of errors resulting from such use (not what they are made for) and many consider this technique a "gimmick". Just some information. It's up to you. It's your site.