Builders use different jigs and methods to provide a gap between deck boards to allow debris and water to fall through and to give the boards room to expand as they absorb moisture. With four “wings” of different sizes, reusable Spax deck spacers can help ensure uniform gaps of four common dimensions—1/16 inch and 1/8 inch for pressure-treated boards and 3/16 inch and 1/4 inch for composite or PVC boards. Each wing is notched to help with fastener alignment. A hole in one wing is handy for pulling out a spacer if it becomes stuck. The spacers come three in a package.

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