Indications Your Deck Needs to Be Replaced

By Scott Klemetson, Project Developer

A safe and sturdy deck is essential for enjoying outdoor living. Over time, even the best-built decks can deteriorate, and knowing the warning signs can save you from costly damage—or worse, a safety hazard. While some problems are obvious, others hide beneath the surface. Let’s look at the most common signs your deck may need replacing, starting with its foundation and structure.

1. Structural Issues That Commonly Arise

Inadequate Footings That Lead to Deck Replacement

Improperly installed footings are a leading cause of long-term deck problems. Many homeowners aren’t sure how their footings were constructed—especially if they didn’t build the deck. Footings should always extend below the frost line for your region. If they don’t, you may notice posts settling unevenly or heaving out of place over time.

Insecure Posts

Deck posts are critical to the integrity, safety, and lifespan of your deck. Signs of trouble include rotting, decay, cracking, warping, or loose connections—particularly at ground level where posts meet the soil or attach to other components. Weak posts compromise the entire structure.

Unstable Joists or Beams

Compromised joists or beams can pose a serious safety risk, even leading to collapse. Watch for visible rot, decay, or inadequate spacing. Internal rot—caused by moisture infiltration or fungal growth—is especially sneaky. To test for hidden decay, push the tip of a flathead screwdriver between deck boards into the top of a joist. If it slides in easily, internal rot is present. A wobbly or bouncy feel when you walk across your deck can also indicate failing joists, beams, or posts.

Ledger Board Rot

The ledger board connects your deck to your home and carries up to half of the deck’s weight. Without proper flashing, water can infiltrate behind it, leading to rot in the board and even damage to your home’s structure. A healthy, secure ledger board is essential for overall deck safety.

2. The Age of Your Deck That Lead to Deck Replacement

Wood decks have a limited lifespan. If your deck is 12–15 years old (or older) and hasn’t been replaced or thoroughly refurbished, it’s time to start considering a replacement. If you’re unsure of your deck’s age, a professional inspection can help determine its condition and safety.

3. Don’t Wait for a Problem to Become Dangerous

Replacing a deck before a failure occurs not only protects your home but also ensures your family’s safety. If you notice any of these warning signs—or if your deck simply feels unstable—it’s worth calling in a professional for an inspection.

At Deckmasters, we’ve been helping homeowners build safe, beautiful decks since 1989. Whether it’s evaluating your current deck or designing a brand-new one, we can guide you every step of the way.