Yes, you can let your deck go grey if you prefer a weathered look. However, it’s important to note that allowing your deck to grey naturally can lead to potential issues such as reduced resistance to moisture, UV damage, and the possibility of splintering. Regular maintenance, including oiling or sealing, helps protect the wood and maintain its durability while preserving its original colour and appearance. If you choose to let your deck age naturally, be aware that it may require more frequent inspections and care to address any wear or damage.