Why are my floors bouncy?

Bounce usually points at the framing rather than the supports beneath it. Joists spanning further than they comfortably should, a joist that has been notched or drilled for plumbing, or framing weakened by moisture will all deflect under foot traffic. Failing supports produce a different sensation — a steady slope or a dip rather than springiness. An evaluation that looks at both the support line and the framing establishes which one you have, and the distinction matters because sistering joists will not help a settled pier and re-supporting a pier will not stiffen an overspanned joist.

Do gaps at the trim mean the foundation is moving?

They can, and they are worth documenting with a date. A gap opening between baseboard and wall, or between trim and a door frame, indicates two elements moving relative to each other. That said, older houses have seasonal timber movement, and finishes fitted decades ago move for reasons that have nothing to do with the supports. Appearance alone does not establish the cause; what does is the combination of elevation readings from above and an inspection from underneath.

Is crawlspace moisture a warning sign?

It is a contributing factor worth documenting rather than a structural finding on its own. Damp crawlspaces are common in this housing stock. What matters is whether sustained moisture has affected the wood: soft or spongy framing, discolouration with elevated moisture readings, or visible decay at sill plates and girder ends. Moisture and framing condition are assessed together, and moisture alone does not mean your floors need re-supporting.

Should I be worried about a house that has been shimmed before?

Not necessarily — adjustment is normal maintenance on this construction and previous work is common. What is worth looking at is the quality of it. Shims properly seated on an adequate pad are fine. Loose stacked packing, timber wedges driven in as a fix, or bottle jacks left in place as permanent support are signs of improvised work, and they usually mean the underlying issue was never addressed.

What should I document before calling anyone?

Which rooms slope and in which direction, where floors feel bouncy, which doors bind and on which edge, and where trim gaps have appeared. Date everything and photograph what you can. If you can safely get into the crawlspace, photograph the supports, any standing water, and anything that looks improvised. That record makes an evaluation faster and more accurate.

Signs Your Pier-and-Beam Foundation Needs Work

The observations worth acting on before you consider pier-and-beam repair, and the ones worth simply monitoring.

Older houses move, and that is not the same as needing repair

Fort Worth has a large stock of pier-and-beam homes — Fairmount, Ryan Place, parts of Arlington Heights — built when this was standard construction. Most of them have some slope in the floors, some seasonal timber movement, and a crawlspace that is not showroom dry.

None of that means a house needs work. What matters is whether something has changed, whether the structure is doing something it should not, and whether the framing is sound.

This guide covers the observations worth recording and the ones worth acting on.

Floors

Slope. A room that reads noticeably downhill toward one wall or corner. Every old house has some; the questions are how much, whether it forms a pattern, and whether it is progressing.

Bounce. Springiness underfoot, particularly noticeable in the middle of a room or when someone walks past. This usually points at the framing — joist span, joist condition, or a joist that has been cut into for plumbing — rather than at a settled pier.

A dip along a line. A depression that runs in a straight line across a room or through the house often follows a girder. That is a useful clue and worth mentioning.

Movement or noise. Boards that flex visibly, or a distinct creak that has appeared where there was none.

Doors, windows and trim

Doors that bind, or that have been planed or rehung at some point to keep working. Windows that have become stiff. Gaps opening between baseboard and wall, or where trim meets a door frame. Separation at the junction between a room addition and the original structure.

Record which doors, which edge binds, and when you first noticed. Multiple doors affected on the same side of the house, persisting across seasons, is a pattern. One door binding in humid weather is a door.

Interior door of a historic bungalow that no longer closes squarely against its frame

What the crawlspace tells you

If you can get under the house safely, this is where the most direct evidence is. If you cannot, note that too — restricted clearance is itself relevant.

Standing water or evidence of it. Water staining, silt lines, persistently dark ground. Bulk water needs addressing on its own terms before anything else.

Wood condition. Soft or spongy timber, particularly at sill plates and the ends of girders where they meet supports. Visible decay. Crumbling or powdery surfaces.

Support condition. Piers that have visibly settled, cracked, or shifted. Timber posts deteriorating at the base. Missing or displaced shims.

Improvised work. Bottle jacks left in place. Stacked timber packing. Blocks piled without a pad. These indicate an earlier fix rather than a scoped repair, and they usually mean the underlying cause is still there.

Insect evidence. Mud tubes, damaged wood with characteristic patterns, frass. Record it and get a qualified pest inspection; a foundation contractor should not be diagnosing an active infestation.

Damp crawlspace with timber supports and darkened ground beneath an older home

What appearance cannot establish

Question	Why observation alone falls short
How much has the floor dropped?	Needs relative elevation readings across the house
Is it the supports or the framing?	Needs inspection from underneath, not just from above
Is the wood structurally compromised?	Needs probing and moisture readings, not a photograph
Is it still moving?	Needs two dated observations
Is the moisture causing harm?	Needs wood condition assessed alongside it

A photograph of a damp crawlspace with some discoloured timber tells you almost nothing about whether the framing has lost capacity. That is a hands-on question.

When it is worth getting measured

When the slope has changed, when floors have become bouncy where they were not, when doors have stopped working across a season change, when you find standing water or soft wood in the crawlspace, or when you are buying or selling and need the question settled with documentation.

A foundation evaluation on a pier-and-beam home means both elevation readings from inside and an inspection underneath. Both halves are necessary, and an evaluation that skips the crawlspace on a crawlspace home is not an evaluation.

For the mechanism behind sagging specifically, see sagging floors and pier-and-beam homes. For the repair work itself, see pier-and-beam repair.