A pressure-treated wood fence in Charleston can last twenty years or fall apart in five. The difference is partly maintenance, but mostly it comes down to how it was built in the first place — and one detail in particular.
That detail is the post. Almost every failed wood fence we're called out to replace failed at ground level, where the post meets the soil. Lowcountry ground holds moisture, and a post that was set too shallow, set in dirt instead of concrete, or backfilled so water pools around it will rot from the outside in. Set properly — dug to depth, plumbed, and set in concrete with the ground sloped away — the same post lasts decades. Panels and boards can always be replaced. Posts are the expensive part.
Once it's up, give it a season before you seal it. New pressure-treated lumber holds a lot of moisture from the treatment process, and stain applied too early won't penetrate — it'll sit on the surface and peel. Wait until the wood has dried out, usually a few months, then apply a quality water-repellent stain or sealer. After that, re-coat every two to three years. In full sun exposure, closer to two.
Keep vegetation off the fence. Vines, shrubs pressed against boards, and sprinkler heads spraying the same panel every morning all hold moisture against the wood and accelerate rot. Trim back a few inches of clearance and aim irrigation away from the fence line. It's a small habit that adds years.
Walk it once a year, ideally after storm season. Push on each post — any movement means the base is starting to go and it's far cheaper to reset one post than to replace a whole section later. Check gate hinges and latches too, since gates take more wear than any other part of the fence and are usually the first thing to sag.
If your fence is already showing its age, we can tell you honestly whether it's worth repairing or replacing. Call Walter Handyman LLC at (941) 323-8919 for a free inspection anywhere in Charleston, Berkeley, or Dorchester County.