When the Timber Wall Starts Pushing,
It's Already Too Late to Patch It
A new homeowner.
A problem he inherited.
Mark had just closed on his home in Centerville when he spotted it — a rotting timber retaining wall along the back of the house, visibly bowing and pressing against the posts of his second-story deck. He didn't create the problem, but he knew he'd own the consequences if he didn't act. A referral from a Heritage Outdoors client in Minneapolis brought him to us.
The fix was clean and permanent: remove the failing timbers, excavate, re-grade, and install a natural boulder wall to hold the slope for good. No mortar, no polymeric sand, nothing that Minnesota winters can compromise — just stone, gravel base, and drainage fabric. The kind of wall that outlasts the house.
Once a timber wall is actively bowing and transferring lateral force into adjacent structures, there's no patching it. Full removal and replacement is the only real answer — and natural boulders are about as permanent as it gets.
Get a free estimateA timber wall on
its last leg.
The original railroad tie wall had been failing for years before Mark purchased the home. The timbers had rotted through and were actively pushing laterally into the deck posts — a structural concern, not just a cosmetic one. This is what a timber wall looks like when it's done.
Why timber walls fail —
and why they can't be fixed.
"Timber walls have a lifespan. When they're done, they're done — and this one was done. It was pushing the deck. That's not something you can buy time on. The boulder wall we put in will outlast everything around it."
— Jacob Bluhm · Lead Installer · Heritage OutdoorsBoulder wall — clean,
permanent, done.
The completed boulder wall holds the grade along the house and under the deck, with clean gravel surfacing throughout. The deck posts are no longer under lateral pressure. Mark got a wall that requires zero maintenance and will never need to be replaced.
Out with the timbers.
In with stone that lasts.
Boulder walls in Centerville —
what people ask us
Can a boulder wall replace a failing timber retaining wall in Minnesota?
Yes — timber wall replacement with natural boulders is one of the most common projects Heritage Outdoors does. Timber walls rot, bow, and lose structural integrity over time, especially under Minnesota's freeze-thaw cycles. A natural boulder wall is permanent, requires zero maintenance, and handles Minnesota winters without moving. Heritage Outdoors handles full demo and rebuild. Call 651-219-3668 for a free estimate.
How much does a boulder retaining wall cost in Minnesota?
Boulder wall installation in the Twin Cities and north metro typically runs $40–$100+ per square foot installed depending on wall height, stone type, and site access. Heritage Outdoors has a $5,000 project minimum and always provides a free on-site estimate. Call 651-219-3668.
How long do timber retaining walls last in Minnesota?
Most timber and railroad tie retaining walls last 10–20 years before rot and lateral movement become structural concerns. Minnesota's wet springs and freeze-thaw cycles accelerate deterioration. Once a timber wall starts bowing or pushing against adjacent structures, patching isn't an option — full replacement is the only real fix.
Do boulder walls require maintenance?
Virtually none. Unlike timber walls that rot or block walls that shift and need joint maintenance, boulder walls are dry-stacked natural stone. There's no mortar, no polymeric sand, and no materials sensitive to Minnesota's climate. A properly built boulder wall with drainage fabric and a gravel base will hold for decades without anyone touching it.
Does Heritage Outdoors serve Centerville and the north metro?
Yes. Heritage Outdoors serves the entire Twin Cities metro including the north corridor — Centerville, Forest Lake, Hugo, Lino Lakes, Columbus, and surrounding communities. Call 651-219-3668 or request a free estimate online at heritageoutdoorsmn.com.
Dealing with a failing retaining wall
in the Twin Cities north metro?
Whether it's a timber wall pushing against your structure or a slope that needs permanent control, Jacob will come out, look at what you have, and give you an honest answer on what it would take to fix it right.
Jacob & Haven. Family owned and operated out of Saint Paul. Hardscape and landscape design-build done right — from the first call to final walkthrough.
651-219-3668 haven@heritageoutdoorsmn.com