Wood Movement: Why Solid Wood Furniture Moves
By Brian James, owner of Madera Furniture Company · Updated October 2026
What it is
Solid wood is a natural material that never stops responding to the air around it. In humid months it takes on moisture and swells slightly; in dry months, especially when the heat is running, it gives moisture back and shrinks. Almost all of this seasonal wood movement happens across the width of a board, very little along its length.
Wood moves most along its growth rings, about half as much straight across them, and almost not at all along its length. So how a board is cut matters. Flat sawn boards have rings running across their width, so they move the most and can cup. Quarter sawn boards have rings standing upright, so they move the least. Rift sawn boards fall in between, stay flat, and show straight grain on every face.
How we build for it
We build every piece in our Tacoma shop for clients across the Pacific Northwest, where seasonal humidity swings are part of life. Each one is built to minimize movement:
Stable cores. For wide tops, doors and panels, we often build on plywood, MDF or other engineered substrates made from layers glued with the grain crossing, so each layer holds the next in check. We face that core with real wood veneer, so the piece looks and feels like solid wood but moves far less than a solid board of the same size.
Stable lumber. Where a piece calls for solid wood, we favor rift and quarter sawn boards for wide parts and let lumber acclimate in our shop before we build.
Floating panels. Door and cabinet panels sit in grooves, so they can expand and contract without cracking the frame.
Movement-friendly fasteners. Solid wood tabletops are attached with hardware that lets them move, not screws that pin them in place.
Breadboard ends. On solid wood tables, these keep wide tops flat while still letting them move.
These methods greatly reduce movement, but wood is a natural material, and solid wood parts like edges, frames and legs can still move slightly. Your piece may never show any change, but it’s helpful to know what can happen.
What you might notice
A small gap opening between panels in winter, closing again in summer
A drawer or door that is snug in humid months and easier in dry ones
Slight changes in how a tabletop sits as the seasons turn
If you do notice changes like these, they're normal and usually settle within a season.
How to reduce wood movement in your furniture
Keep indoor humidity steady, ideally between 35 and 55 percent
Keep pieces away from heating vents, radiators, fireplaces and air conditioners
Avoid long stretches of direct sunlight
Let a new piece settle into your home for a few weeks before judging fit
If something looks beyond normal movement, a large crack or a joint opening up, let us know and we will take a look.
Frequently asked questions
Why does my wood table have a gap in winter?
Indoor heating dries the air, and solid wood gives up moisture and shrinks slightly across its width. Small gaps between boards or around cabinet and door panels are normal and usually close again as humidity returns.
Does solid wood furniture expand in summer?
Yes. In humid months solid wood takes on moisture and swells slightly, mostly across its width and very little along its length.
Is quarter sawn or rift sawn wood more stable than flat sawn?
Yes. Quarter sawn boards move the least across their width and rift sawn boards move only a little more, while flat sawn boards move the most and can cup.
What humidity is best for wood furniture?
Steady indoor humidity between 35 and 55 percent keeps solid wood most comfortable. Avoid placing pieces next to heating vents, fireplaces or air conditioners.
Why is my wood table cupping?
Cupping happens when one face of a board takes on or loses moisture faster than the other, so the board bows slightly across its width. Flat sawn boards are most prone to it, and steady humidity, shade from direct sun and distance from heat sources help prevent it.
Will my solid wood furniture crack?
Cracks are uncommon in a piece built to allow for movement and kept away from heat sources and very dry air. If you notice a crack or a joint opening, contact us and we'll take a look.
Do plywood and veneered panels move like solid wood?
Very little. Their layers are glued with the grain crossing, so each layer holds the next in check, though solid wood edges and frames can still move slightly.
Related: Care & Warranty