USG Corporation (NYSE: USG) is offering their Facebook fans a chance to win up to $500 through their Strength Beneath the Surface Contest which requires contestants to submit an on the job picture of themselves and USG Tile and Flooring products.

The Grand Prize winner will receive a $500 gift card, and the four runners-up winners will each receive a $100 gift card. All entrants will receive a free t-shirt.

This contest is open to professional contractors, subcontractors, do-it-yourselfers and others who are engaged in the construction or remodeling industry. In order to participate, entrants must be a legal resident of the United States and 18 years of age and older.

The Strength Beneath the Surface photo must show the participant and USG Tile and Flooring products on the job. Products can include: DUROCK Cement Board, FIBEROCK Tile Backerboard, FIBEROCK Underlayment, DUROCK Tile Membrane, DUROCK Tile Membrane Adhesive, FIBEROCK Floor Protector Paper, Builder Paper, DUROCK Multi-Use Self-Leveling Underlayment, DUROCK Quick-Dry-Self-Leveling Underlayment, DUROCK Floor Patch, DUROCK Primer-Sealer, DUROCK Tile Backer Tape and DUROCK Tile Backer Screws.

Judging will take place October 22 through October 26, 2012, with a judging panel consisting of marketing and product managers from USG Tile and Flooring Installations. Finalists will be selected based on craftsmanship, creativity and use of USG Tile and Flooring Installation Products. Voting will then be turned over to the public on October 29-November 11, 2012, when each person can vote once a day for their favorite picture. Judges will announce the final winner on or by November 16, 2012.

For more information about the Strength Beneath the Surface Contest, please visit www.facebook.com/usgtileflooring.