Laying decking on concrete might seem feasible, but it poses significant risks. Moisture retention in concrete can accelerate rot and decay in wooden decks, considerably reducing lifespan. Even composite materials can suffer from trapped moisture. Additionally, the differing expansion and contraction rates of concrete and decking can lead to warping. Proper airflow and drainage are crucial to maintaining deck stability; without them, deterioration and potential accidents are likely. DIY enthusiasts must consider these factors seriously before proceeding with decking projects over concrete surfaces.
Concrete retains moisture, putting wood decking directly on top of it can hasten rot, deterioration, or the formation of mould, drastically reducing its lifespan.
Trapped moisture will lead to rot and decay in timber decking and mould and mildew in composite decking.
Concrete and decking materials expand and contract at different rates, which can cause warping and instability.
Without proper airflow and drainage, the decking can become unstable and deteriorate over time.
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