Wausau Paper to Release 2006 Fourth-Quarter and Year-End Financial Results on February 1

MOSINEE, Wis.–(BUSINESS WIRE)–Jan. 3, 2007–Wausau Paper (NYSE:WPP) will release 2006 fourth-quarter and year-end financial results on Thursday, February 1, 2007, after the close of the New York Stock Exchange. The company will hold a Webcast to discuss earnings and current market conditions at 11:00 a.m. Eastern Standard Time on Friday, February 2.

All interested parties are invited to listen to the Webcast live via the company’s Internet site at http://www.wausaupaper.com under “Investor Information.” A replay of the call will also be available on the Web site from 1:30 p.m. E.S.T., on February 2, 2007 until midnight February 9.

About Wausau Paper:

Wausau Paper, with record revenues of $1.1 billion in fiscal 2005 produces fine printing and writing papers, technical specialty papers, and “away-from-home” towel and tissue products. To learn more about Wausau Paper visit: http://www.wausaupaper.com.

Safe Harbor under the Private Securities Litigation Reform Act of 1995: The matters discussed in this news release concerning the company’s future performance or anticipated financial results are forward-looking statements and are made pursuant to the safe harbor provisions of the Securities Reform Act of 1995. Such statements involve risks and uncertainties which may cause results to differ materially from those set forth in these statements. Among other things, these risks and uncertainties include the strength of the economy and demand for paper products, increases in raw material and energy prices, manufacturing problems at company facilities, and other risks and assumptions described under “Information Concerning Forward-Looking Statements” in Item 7 and in Item 1A of the company’s Form 10-K for the year ended December 31, 2005. The company assumes no obligation to update or supplement forward-looking statements that become untrue because of subsequent events.

      CONTACT: Wausau Paper              Investor and Media Contact:              Perry Grueber, Director Investor Relations, 715-692-2056              Fax: 715-692-2020      SOURCE: Wausau Paper