Determining whether your deck is rotted requires a visual inspection and an assessment of certain signs of decay. Here are some indicators that your deck may be experiencing rot:

1. Soft or Spongy Areas:

   • Walk across the deck and press down on different areas with your foot. If you notice any sections that feel soft or spongy underfoot, it could indicate rot. Rot compromises the structural integrity of the wood, causing it to lose its firmness.

2. Visible Mold or Mildew:

   • Mold and mildew can contribute to wood decay. If you see visible signs of mold or mildew on the surface of the deck, it may suggest moisture-related issues that can lead to rot.

3. Discoloration and Stains:

   • Dark or discolored areas on the wood, especially accompanied by stains, may indicate water damage and potential rot. Check for discoloration on both the surface and underneath the deck.

4. Presence of Fungus:

   • Fungal growth on the wood, such as mushrooms or other types of fungi, is a clear sign of decay and rot. This typically indicates advanced deterioration.

5. Visible Cracks or Splits:

   • Inspect the wood for visible cracks or splits. These can be entry points for water, accelerating the rotting process.

6. Loose or Rotted Fasteners:

   • Check the screws, bolts, and other fasteners. If they appear rusty or are easily pulled out, it may indicate the wood around them has deteriorated.

7. Excessive Moisture:

   • Assess the overall moisture content of the deck. If the wood feels consistently damp or if you notice water pooling in certain areas, it could contribute to rot over time.

8. Wood Fiber Breakdown:

   • Use a screwdriver or another probing tool to gently poke the wood in various locations. If the wood easily gives way or crumbles, it is a strong indication of decay.

9. Visible Rot from Below:

   • If your deck is elevated, inspect the underside. Visible rot or decay from beneath is a clear sign that the structural integrity of the deck is compromised.

10. Wood Smells Musty or Earthy:

    • A musty or earthy smell, especially in conjunction with other signs, could indicate decay and rot.

If you observe any of these signs, it’s important to address the issue promptly. Rot can spread, leading to further damage and compromising the safety of the deck. Consider consulting with a professional contractor or a structural engineer to assess the extent of the damage and recommend appropriate repairs or replacements. Regular maintenance, including sealing or staining your deck, can also help prevent rot and extend its lifespan.