Post and Pier Replacement Across the Carolinas

Pier and beam homes, common throughout the Carolinas, carry their floors on a grid of support posts and piers spread across the crawl space. Each post takes a share of the load from the beams above and transfers it down to a footing in the ground.

When a post or pier fails, that share of the load loses its support and the floor above it drops, which is why post and pier problems so often show up as a localized dip or sag in one part of a room.

Two failures are most common. Wood posts rot at the base where they meet damp soil or a damp footing, especially through humid Piedmont summers and in high water table areas near the coast around Wilmington and Leland. And posts settle when the soil or footing beneath them gives way, including in expansive clay around Charlotte and the Triangle that shifts with seasonal moisture.

Replacing a post or pier restores that point of support. The framing above is carefully supported and lifted to relieve the load on the failing post, the rotted or settled post is removed, and a new, properly sized support is installed on sound bearing.

The footing matters as much as the post itself. A new post set on a footing that is still settling will follow the old one down, so we address the base as well as the wood. Once the new support is in and bearing properly, the framing is brought back toward level gradually so finishes above are protected.

A single dropped post is a contained fix, and we tell you when that is all you are looking at. If the post failure has also let the joists above it sag, those joists are reinforced as part of the plan, and where the beam above has weakened, the carrier beam is evaluated too.

We also explain the cause, because a homeowner who understands why a post rotted or settled can make a sound decision about the crawl space conditions around it.

A failing post usually shows up as a dip in the floor over one spot, often in the middle of a room or along a hallway. Doors near that spot may start to stick, and cracks can open in drywall above them.

In the crawl space, warning signs include wood posts that are dark or soft at the base, posts that lean or have sunk into the soil, masonry piers with cracked or loose blocks, shims that have crushed or slipped, and gaps between the top of a post and the beam it should be carrying.

Wood posts often rot at the base, where they sit on damp soil or a damp footing and draw moisture up into the wood. Humid air under the house through Piedmont summers and standing water after storms keep that base wet.

Settlement is a footing problem. Some older homes have posts set on loose block, flat stones or soil with no real footing at all. In clay soil around Charlotte and Greensboro, seasonal wetting and drying can move a shallow footing, and near the coast, saturated sandy soil can let one sink. A post that settles lets the beam above it drop, and the joists follow the beam down.

Crawl spaces in the Carolinas carry their floors on wood posts, stacked block or brick piers, or a mix of both. Wood posts are simple and common in older homes but can rot at the base. Masonry piers resist rot but can crack, shift or lose mortar over time.

Many replacements use adjustable steel supports set on new concrete footings. They do not rot, and because they can be adjusted, the floor can be raised gradually and fine tuned. Which support fits depends on the load, the spacing of the beam above and the soil below.

A post only carries the floor as well as the ground under it carries the post. A footing, typically a poured concrete pad, spreads that load across a wider area of soil so the support does not push down into it.

When an old post settled because it had little or no footing, setting a new post in the same place leaves the same problem in place. We check the footing at every failed support and place a new one where it is needed before the new support goes in.

Most post and pier replacement projects fall between $5,000 and $20,000. Where a project lands depends on how many posts or piers need replacing, the footings they need, whether the beam or joists above also need work, and how much room there is in the crawl space. A range is not a quote. Your written estimate comes from the free inspection, and financing is available.

Framing repairs carry a 30 year warranty that the work was completed correctly per state building code, which begins once the final invoice is paid in full and does not cover termite damage, or moisture or water damage unless a full encapsulation, a drainage system and a dehumidifier are all installed as part of the same project. The complete terms are on our complete warranty terms page.