Sagging Floors? It Might Not Be Your Subfloor — It’s What’s Beneath It

If your floors feel soft, uneven, or “bouncy,” it’s easy to assume the subfloor is the problem. But the truth is — in most cases — your real issue is underneath the subfloor.

At PierPoint Foundation Solutions, we’ve fixed hundreds of homes where the floor wasn’t the issue — it was the crawl space that gave out.

Here’s how to spot the difference, and what you can do to fix sagging floors for good.

🪵 Subfloor vs. Structural Support

Your subfloor is the layer of wood (usually OSB or plywood) that sits above your crawl space and under your finished flooring. But beneath that is what really holds everything up:

• Floor joists (horizontal boards running across your crawl)

• Main support beams (larger load-bearing boards or steel)

• Concrete or block piers and footings

• Jack supports or steel posts (if they’ve been added)

When those components start to weaken, shift, or rot, your subfloor has nothing solid to rest on — and that’s when you feel sagging.

🚨 Signs It’s Not Just the Subfloor

Watch for these signs your issue is structural, not just surface-level:

1.

Sloping Floors Across a Room

Subfloors don’t “sag across a span” — that usually means the beam or joists underneath have dropped or settled.

2.

Gaps Between Floor and Baseboards

As the support structure falls away, your subfloor dips, and those gaps open up.

3.

Cracks in Interior Walls or Ceiling Corners

Structural movement below the home causes the entire frame to twist slightly — leading to visible damage above.

4.

Soft Spots in Traffic Areas

Joists spaced too wide or weakened by rot will flex when stepped on — making the floor feel springy or hollow.

5.

Previous DIY Patching or Improper Jack Placement

Temporary fixes might hide the problem but never solve it. Eventually, they fail — usually worse than before.

🛠️ What We Do to Fix It Right

At PierPoint, we don’t just patch — we rebuild and reinforce. Our floor repair systems include:

✔️

Jack & Beam Installation

We strategically install steel jacks and new beams under weak areas to level and stabilize the floor system.

✔️

Joist and Beam Replacement

If the wood is rotted or undersized, we replace it with pressure-treated, code-compliant materials.

✔️

Moisture and Mold Prevention

We don’t stop at the structure — we also install encapsulation systems and drainage to stop future wood damage.

✔️

Photo Reports and Lifetime Warranties

You’ll get proof of the damage, proof of the repair, and the protection to go with it.

🧰 Subfloor or Structure — We’ll Tell You the Truth

Not every floor needs structural repair. Sometimes it is just subfloor rot or poor installation. But most of the time, if your floor is sagging — the real problem is underneath.

That’s where we come in.

🛠️ Need a Floor Repair You Can Trust?

At PierPoint Foundation Solutions, we offer free inspections with honest evaluations — and permanent structural solutions.

📍 Serving all of Arkansas

📅 To schedule an inspection, contact Dakota Treece:

📞 (501) 284-9330

📘 Message us on Facebook @PierPointFoundationSolutions

🔗 Schedule Your Free Inspection

Don’t guess what’s under your floor — let us show you.