Pole Barn Post Rotted at Ground — Repair Without Tearing It Down
The bottom of a post in the old barn is soft or gone at the ground line, the steel is bowed, and a corner has settled. Here is how rotted posts are repaired one at a time.
When a pole barn post rotted at ground level, the building does not have to come down. JMB Builders shores the truss and wall, digs out the post base, cuts off the rotted section, and either splices on a new treated section or sets the post on a steel bracket anchored in a new concrete collar or pier. North metro and central Minnesota, priced per post from photos.
- Priced per project, by the number of posts
- Building shored while each post is repaired
- Spliced section or bracket on a concrete base
- Engineer when many posts or the wall have moved
- Licensed MN contractor BC809005
Posts in older pole barns rot where the wood meets the ground: the first foot or two below grade and just above it, where air and water meet. Older posts often were not treated for ground contact, or the treatment has run out. Water off a roof without gutters, manure, or soil piled against the wall speeds it up. You see it as bowed or rusted bottom steel, a settled corner, a door that no longer closes, or a post you can push a screwdriver into.
The repair is done one post at a time with the building held up. The truss and girts at that post are shored with temporary posts or jacks. The soil and any concrete around the base are dug out. The rotted part is cut off above the rot. Then one of two things: a new treated section is spliced on and bolted with a long overlap, set on a new footing; or the post is cut off above grade and set on a steel bracket anchored in a new concrete collar or pier, so the wood never touches the ground again.
When most of the posts on a wall are gone, the wall has leaned, or trusses have dropped, an engineer looks at the building and writes the repair. We also fix the reason it rotted: gutters, grading away from the wall, and bottom steel with a gap above the ground.
What you supply
- Photos of each bad post from inside and outside, and a wide shot of the wall
- The building size, post spacing and roughly how old it is
- Clear space inside at each post for shoring and digging
- Any buried lines near the posts that you know of
What JMB supplies
- Temporary shoring at each post while it is repaired
- Digging out the post base and any concrete around it
- Rotted section cut off; new treated section spliced and bolted, or a steel bracket set in a new concrete collar or pier
- Girts and splash board refastened, and bottom steel removed and reset or replaced
- Engineer's repair letter when the wall or trusses have moved
- Grading or gutter work to stop it happening again, and photos in your job folder
How it is priced: per project
Quoted in writing from your photos within one business day. What moves the number:
- Number of posts and how far up each one has rotted
- Splice versus bracket and concrete base at each post
- Concrete floor or apron that has to be cut at the post
- Access inside around equipment, stalls or storage
- Bottom steel and splash boards to remove and reset or replace
- Whether an engineer's letter is needed for a leaning wall or dropped trusses
Push a screwdriver into each post at the ground line and send photos of how many go soft. The count sets the price.
How long it takes
One or two posts: one day. A full wall of posts: several days, done one post at a time with the building shored.
How your project works
- 1
Send photos, get a written quote
Send three photos of the space and a sentence about what you want. You get a clear, itemized quote within one business day. We only come out to measure first when the job needs a tape measure — no pressure, no games.
- 2
Pick materials, or bring your own
We help you choose profiles and materials that fit the house and the budget, or match your existing millwork exactly — or you buy the door or trim yourself and we install it. Everything is confirmed before the crew is scheduled.
- 3
Clean, precise installation
The crew shows up on time, protects floors and furniture, and installs with tight joints and consistent reveals. Photos of the finished work go in your job folder.
- 4
Walkthrough and invoice
We walk the finished work with you. If anything is not right, we fix it before we call the job done. Then one invoice, paid by check or direct deposit — no card fees, no payment links.
Pole Barn Post Rotted at Ground — Repair Without Tearing It Down: questions, answered
How do you repair a pole barn post rotted at the ground?
The truss and wall at that post are shored, the base is dug out, and the rotted section is cut off. A new treated section is spliced on and bolted, or the post is set on a steel bracket anchored in a new concrete collar or pier so the wood stays out of the ground. Each post is done one at a time.
Can rotted pole barn columns be repaired without tearing the building down?
Yes, in most cases. Posts are repaired one at a time with the building shored, and the steel, trusses and roof stay in place. Tearing down makes sense only when most posts and the trusses are gone.
Is a post splice or a concrete base better for a rotted pole barn post?
A splice keeps the post in the ground on a new treated section and suits posts rotted a short way. A bracket on a concrete collar or pier takes the wood out of the ground for good and suits posts rotted further or in wet soil. We pick per post from what we find once the base is dug out.
Why are my pole barn posts rotting at the bottom?
The ground line is where wood stays wet and gets air, the combination that rots it. Older posts may not have been treated for ground contact, and roof water with no gutters, soil or manure against the wall, and poor grading all keep that zone wet. Fixing the water is part of the repair.
Do I need an engineer to repair pole barn posts?
For one or two rotted posts on a straight wall, a standard splice or bracket repair is usual. When most posts on a wall are gone, the wall has leaned, or trusses have dropped, an engineer looks at the building and writes the repair before work starts.
How do I know if my pole barn posts are rotted?
Bowed or rusted bottom steel, a corner or door that has settled, doors that no longer close, and a screwdriver that sinks into the post at the ground line from inside. Dig a few inches down at one post and look; the worst rot is usually just below grade.
Recent JMB work, from our job log
59 installs recorded across 30 Twin Cities communities since Dec 2025. Window and door installs for homeowners and for the builders and dealers we sub for. Counts come straight from our job log; no customer names.
Get a written quote for this job
Three photos and a sentence is enough. You hear back within one business day. Or text the photos to 763-204-2099.
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Read morePage reviewed September 26, 2026 · JMB Builders LLC, MN license BC809005 · All pole barns pages
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