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Structural Wood Repair · Blue Grass, IA
Sagging Floor & Wood Repair in Blue Grass
Sagging, sloping, or bouncy floors in Blue Grass usually mean a failed joist, beam, or support below. We find the real cause and fix it for good.
Why It Sags
Why Blue Grass Floors Sag — and How We Fix Them
A floor that slopes or bounces is almost always structural: a rotted joist, an undersized beam, a deteriorated sill plate, or a settled support post. Clay soils around Blue Grass can pull supports out of level over time. We diagnose what actually failed and repair the structure so the floor stays level for good.
What We Do
What We Repair Below the Floor
Floor Joist Repair & Sistering
Reinforcing or “sistering” cracked, sagging, or undersized joists, and replacing those that are too far gone.
Beam & Girder Replacement
Replacing failing main beams and girders, and adding properly sized support where the original was undersized.
Sill Plate & Rot Repair
Cutting out water-damaged sill plates and rotted framing and rebuilding with treated, properly flashed material.
Support Posts & Jacks
Adding or replacing support posts and adjustable columns on proper footings to carry the load and re-level the floor.
Root Cause
Often It Starts With Water
Our Philosophy
A surprising amount of structural wood damage traces back to moisture — a wet crawl space, poor drainage, or a foundation leak quietly rotting the wood above it. We look for that root cause so the new framing doesn’t end up failing the same way. Sometimes the real fix is drainage or waterproofing →
— Behncke Construction · since 1948
Floors sloping or bouncing?
We’ll get under the floor, find what’s actually failing, and recommend the repair that fixes it for good — with a written estimate, usually within one business day.
Related Pages
By the time it shows upstairs, it started below
When floor damage is visible in the living space, the real problem is usually in the crawlspace or sill — where wood meets concrete and moisture collects. We check those hidden connections first, because that’s where the failure starts and where it comes back if it’s missed.
Your next step
“Where is the damage actually coming from?”
Trace it to the source:
- Wood & floor repair — the hidden connections we check
- Basement & moisture control — stopping the water that rots wood
Real customers · real reviews
What Quad Cities homeowners say
“We had our basement joists replaced. Reasonable quote, booked in a timely manner, great communication with expectations and the contract. We could park a semi on our new floors. The owner was a doll.”
“Behncke built an egress window for our home. From the initial scheduling through the conclusion everything was precise and the craftsmanship was perfect. We would highly recommend Behncke for your every need.”