# The Material Conversation

Hewn Shop Notes · https://hewn.build/shop-notes/the-material-conversation

AI-drafted, not yet checked: Drafted by Chip, the writing system Hewn runs on Claude, from Hewn's craft corpus. Jonathan Salomons has not read this note yet, and no outside reader has checked it. Read it as a shop note: check a number before you cut to it.

Cite as: "The Material Conversation." Hewn Shop Notes, hewn.build/shop-notes/the-material-conversation. Drafted 2026-04-30; AI-drafted, not yet checked.

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The call comes about twelve months in. The client tells you there's a gap in their table. They're not angry yet — just confused. They love the piece. They just don't know what they're looking at.

Here's how to prevent that call. Five minutes, before you start cutting.

The conversation is about what wood does. Solid wood furniture responds to moisture. In a dry interior it loses moisture and contracts. In humid summer air it gains moisture and expands. A 14-inch white oak top in a centrally heated BC Interior house will move roughly 3/16" across the grain over a year. Not a defect. The material doing exactly what it's supposed to do.

Most clients have owned solid wood furniture. They've also probably owned MDF wrapped in laminate and not known the difference. Either way, almost no one has been told what solid wood actually does. The gap between "real wood" as an aesthetic and "real wood" as physics is where commissions go wrong.

Three things to cover, in order.

First: wood moves with the seasons. Normal, expected, not a failure. Wide panels move more than narrow ones. Flat-sawn moves more than quartersawn. Species vary — hard maple is more reactive than cherry or walnut at the same width. You've built the movement in, not ignored it: the joinery accommodates it, the panel floats, the breadboard end is slotted. It's been designed for.

Second: what they might actually notice. In very dry conditions — a forced-air heated house in January with no humidifier — the wood may lighten slightly and a wide panel might show a hairline gap at a seam. Normal. When humidity returns in spring, the wood closes. A crack is a failure. A seasonal seam that closes is not a crack. That distinction matters, and they can't make it if you haven't drawn it for them.

Third: what pushes the extremes. A piece directly over a floor register will see moisture swings the rest of the room won't. Poor insulation on an exterior wall, a room that swings between 20% and 70% RH — these make the movement larger and less predictable. You're not telling them where to put their furniture. You're telling them what drives the hard cases.

Most clients find the conversation reassuring. They learn the builder thought about it. That's the whole point.

Don't open with disclaimers. "I just want to warn you" positions you as nervous rather than knowledgeable. Lead with what you've done: "I want to walk you through how I've handled wood movement in this piece, because it's part of what makes it work long-term."

Be specific. "This top is 13 inches wide in cherry, quartersawn, so it'll move about an eighth of an inch across the grain over a full year" is more reassuring than "solid wood moves, so just be aware." The number tells the client you calculated it. The vague warning tells them you're covering yourself. One closes the conversation. The other opens a negotiation.

Ask about site conditions. Forced air or hydronic? Humidifier? Do they heat different rooms differently? Every answer narrows the range of what the piece will do in their house. More importantly, asking signals that you're thinking about their specific environment, not delivering a canned disclaimer.

Skip the full conversation if the piece is narrow or the species is stable. A single-plank shelf doesn't need five minutes. A small side table in cherry gets one sentence: "Cherry is stable, but it'll develop patina and may show slight seasonal variation in very dry conditions." Done. The full version is for wide panels in responsive species — hard maple, soft maple, flat-sawn white oak, American elm — or houses that run dry all winter.

If you've had the conversation, the twelve-month call takes ninety seconds. "Is the gap at a panel seam? Does it close when you push it? That's normal. It'll close in spring. Check it in March."

If you haven't, you're explaining wood movement for the first time to someone who's been staring at a gap in their table for two weeks and showing it to every person who came over. The information is identical. The context it lands in is not.

Five minutes before you start cutting is worth a lot more than fifteen minutes on the phone a year from now.