The tallest toilet paper tower in 30 seconds is 16 rolls, achieved by Francisco Franco Pêgo (Portugal), in Coimbra, Portugal, on 16 March 2012.

This record was broken on the Guinness World Record Challengers site (Challengers’ tag: Francisco ): http://challengers.guinnessworldrecords.com/challenges/107-tallest-toilet-paper-tower-in-30-seconds