Question: how much does it cost to put down backer board?
Answer: install backer board national average cost The national average cost to install backer board is $1.06 per square foot, with a range between $0.82 to $1.30. The total price for labor and materials per square foot is $5.61, coming in between $4.33 to $6.90. A typical 300 square foot project costs $1,684.