If you have scratched your composite decking, it may not be necessary to replace it. Composite decking is durable and can withstand minor scratches and scuffs. However, the severity of the scratch will determine if you need to replace the affected boards.
If the scratch is minor and doesn't affect the structural integrity of the board, you can consider repairing the scratch. You can use a heat gun or a hot air blower to heat the scratch, which will cause the composite material to expand and fill in the scratch.
If the scratch is deep and affects the structural integrity of the board, you may need to replace the affected boards. Deep scratches can compromise the strength and stability of the board, which can affect the safety of the deck.
The severity of the scratch will determine if you need to replace your composite decking. If the scratch is minor, you can repair it. If the scratch is deep and affects the structural integrity of the board, you may need to replace the affected boards.