Rather than duckboards, take a look at a product called "Dri Dek." You can find it at restaurant suppliers or on-line (http://www.dri-dek.com/?gclid=CLCR84...FQ-R7QodFl0ANw). It is 12" tiles that snap together to form a custom sized mat. They will last forever and can be separated easily to clean the sink. Get black which will not show stains.