8 Signs You Need a New Deck

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Thinking about improving your backyard deck, but aren’t quite sure whether you really need to work on it now? It’s possible that old weathered deck will last you through another snow-filled winter, rainy spring, or blistering summer. At a certain point, all the TLC in the world isn’t going to cut it. So how do you know it’s time to replace a deck? We put together some signs to look for when you’re trying to make old deck hold out just a bit longer but in reality, you need a complete deck renovation or replacement.

1. Your deck is precariously sitting on rotted posts

Rotting deck posts

Newer decks are usually built using concrete footings a couple of inches above the ground and a special bracket to keep the base of the post dry. If your deck is older, there is a good chance the posts rest directly on the footings, which can cause them to soak up water and lead to rotting. This is especially true for posts that are made of wood that is not pressure treated. Posts lose strength as they rot, so eventually they won’t be able to hold the weight of the deck. Having the posts replaced is the safest and best option for your deck.

2. Your railings shake when you grab onto them

Loose RailingsWhile loose railings are not going to cause your deck to fall down and collapse, they are a major safety hazard, especially if you have young children. Whether it’s sooner or later, railing posts that are attached using only nails are guaranteed to come loose. You can try securing deck railings with all of the new nails you want, but it’s not going to solve the problem long term. When we are replacing a backyard deck we always use carriage bolts with washers and nuts to fasten the railing on securely without damaging the wood.

3. Ledger boards aren’t secure enough to keep the deck attached to your house

New Deck Free GuideLedger boards are possibly the most important component of your deck; they hold up the side of the deck that is secured to your house.  A ledger board that isn’t properly fastened or is deteriorating can lead to probably the worst case scenario—your deck completely falling off the house! So, that’s a pretty strong reason to renovate as soon as possible.

4. The post connections are weak

To support the deck, your posts should be sitting under the beam or rim joist. Posts that are fastened to the side of the beam or rim joist are putting weight on the fasteners connecting the post to the deck. To ensure a strong connection between the posts and the beam, the deck should be using galvanized carriage bolts. We’ve come across many instances of deck posts being secured only with standard nails, which could easily lead to a deck collapse.

5. No ledger flashing to keep the water out

You may be asking yourself, “What is ledger flashing?” Basically, it’s what keeps the water from getting between your deck and where it’s attached to your home. It’s essential that the ledger board of your deck is water tight with the house. Even the smallest of water leaks can Keep the water outlead to mold in the walls of your house, or even worse, the rim joist of the house will rot. If the rim joist rots, your ledger board will fall off and cause the entire deck to topple over. You can easily see if you’re missing flashing by going under your deck and viewing the ledger board. If you see no metal or plastic lip over the top of the ledger board, then it’s something you should consider as part of a backyard deck renovation.

6. Deck boards that wobble when you walk

If your deck wobbles or gives in when you walk across it and feels like you could fall through at any moment, then this is definitely a good sign that it’s seen better days. Over time, the joists can pull away from the rim joist or ledger they’re attached to and end up twisting their way out of their vertical position, which causes them to become weaker.

7. There’s structural damage past the point of no return

Structural DamageStructural damage issues are usually a clear indicator that a deck has reached the end of its lifespan. In this case, you’re probably going to need a full replacement rather than just a remodel. If you have rotted wood, you will notice the frame begin to sag. The rot also makes the wood very susceptible to termites, which will eat their way through the wood and create paths that allow water in, accelerating the process of rotting. Once this process begins and the wood becomes even more vulnerable to termites, it starts decaying, and the rot spreads throughout the substructure.  Visible rot on the outer edges of the deck frame and a soft, spongy walking surface are good indicators that your deck has seen the end of its days. You may also notice that screws don’t hold onto the frame members when secured.

8. Your deck is older than regulations

In Pennsylvania and New Jersey, all decks that measure 30″ above grade level are required to have guards around the perimeter with balusters of 4″ or less to ensure safety. If your deck is in violation of the building code, an update is a must. We use and provide our customers with RDI railings to match PVC or wood on new deck renovations to ensure safety codes are met.

The best way to tell if you have issues with your deck is to have a professional decking company come out and assess it. From there, you can evaluate whether you will be best off with a complete renovation or replacement.

Have questions about your deck, or do you have deck renovation story to share?  Leave a comment!


  • deck staining says:

    I see so many decks that could have been saved with just a little bit of tlc.
    Please stain your deck. It will last many more years than bare wood alone..

  • Dave Matz says:

    I know you should probably replace pressure treated (1″x6″) deck boards about every 15-20 years or so and can stretch that out with regular power washing and staining.

    What is expected for the deck structural components? Specs and Codes change for mounting the ledger board to the building and using hangers. Is there any reason to believe that the beams have weakened after 20 years or 30 years in service? I see no sagging. I see a bit of rot where the 6″x6″ goes into ground. But nowhere else.

    If I add additional Lag Screws and hangers and replace any deck posts that have begun to rot (adding a riser to the footing to keep the deck beam raised off the ground) , and replace the deck surface boards, do I bring my deck back to 95% like new?

    Is there any reason to believe the structural wood is past its useful life just because it is 30 year old pressure treated wood?

    • Danny Dean Meadows says:

      When I started replacing my deck boards by taking the old ones off I noticed the condition of the joist hangers and the way the ledger was fastened to the house. I knew I need to find the latest building code for my county and compare it to other counties in my state. I found mine on line by going to the county website and looking for Residential building code for decks. The one for my county matched the one designed by the state which also refers to National building codes for the deck. I basically came to the conclusion that since I had it apart, it was a good time to bring it up to code and I did knowing that it’s safe.

  • Bob says:

    I am a local winston salem deck builder and express these exact points to customers and ask a lot of the same questions when on the phone with a customer questioning whether or not their deck needs a repair or a new deck.

  • Marina Wellis says:

    It was amazing how you explained why wobbly decks are needed to be replaced. According to you, over time, joists pull away from the rims that they’re attached to and end up twisting out of vertical position thus, making then weaker. I nearly fell off the deck when it started wobbling, and my sister shared that she has had similar experiences. Now I think it’s time to call a contractor to help us in constructing a new one. This is great!

  • Ellie Davis says:

    Thank you for pointing out that loose railings could mean you need a new deck. My family just moved into a new house and the railings on the deck are super loose, and the deck just overall needs replacing. I’ll have to look into differnt companies that can come out and install something for us.

    • Danny Dean Meadows says:

      Please don’t make the mistake of having someone do the work who is a friend of a friend. The work is usually not up to code standards but you are paying very close to the same price as a licensed contractor in deck construction. Having it done right will pay for itself in the long run.

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