Please see below text and linked PDF from USG regarding wallboard price increases effective June 30, 2008:

Sales Bulletin - May 30, 2008
 
 
Effective with shipments on and after Monday, June 30, 2008, USG will increase prices on the
following products:
 
 
• ¼” and 3/8” FIBEROCK ® Brand Underlayment will increase 5% per MSF.
 
• ½” FIBEROCK® Brand Tile Backerboard panels will increase 5% per MSF.
 
• All Durock® brand panels will increase 5% per MSF.
 
 
As always, our goal is to offer you the best products at the best value.   We appreciate your
business and look forward to continuing to serve you.  If you have any questions, please contact
your local USG Representative.
 
COVERAGE AREA: The Entire United States