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Floor supports

Crawlspace
Stabilization

Bouncy or unlevel floors, sagging walls, dragging doors — these are all signs of a support problem underneath the home. Schedule your inspection today.

What has happened

Why floors
bounce or sag

There are primarily three reasons floors are bouncy or sag:

  • Over-spanning of the floor framing system
  • Improper support, or a lack of support
  • High moisture content in the wood
Crawlspace support post detail A sagging floor girder shown as a dashed line, corrected by adjustable steel support posts. Floor joists Sag, before Adjustable steel post
Fig. 06 — Adjustable support post, detail Not to scale
Symptoms

Symptoms we see
in homes

Crawlspace support failure is gradual, so people adapt to it without noticing. If a visitor comments on your floors, take it seriously.

01

A dip toward the center

Set a ball on the floor and watch where it goes. Movement toward the middle of the house points squarely at the central girder line.

02

Bounce or spring underfoot

Floors that move when you walk past a china cabinet have lost effective support, whether from pier settlement or from joists that have lost strength.

03

Gaps at baseboard and trim

When the floor drops away from the wall, trim separates. It shows up first at interior partition walls that sit over the girder.

04

Doors that swing open on their own

An interior door that will not stay where you put it is a good indication that its frame is no longer plumb, because the floor beneath it has moved.

05

Doors that stick or drag

When the floor under a doorway drops, the frame is pulled out of square and the door starts catching on the frame or dragging on the floor.

Undersized, poorly supported beam under a home's floor framing in a crawlspace
Inadequate beam support
Crawlspace with debris and makeshift supports on bare soil
What we find underneath
Mold on crawlspace joists, a sign of moisture weakening the framing
Moisture weakening framing
FAQs

Questions we
get asked

Can my floor be made perfectly level again?

Usually it can be improved substantially, and often a great deal. Whether it goes all the way back to level depends on how long it has been sagging and what has been finished on top of it since.

How long does the work take?

Most crawlspace support jobs run one to three days on site, sometimes longer.

Free, on-site, no obligation

Get your floors
measured properly

Elevation readings across the whole floor, a look at every support in the crawlspace, and a written plan for bringing it back. No charge for the inspection.

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