Straight answer: swollen chipboard doesn't shrink back — dry it thoroughly, slice off the fluffed fibres, and seal the edge with glue or varnish so water can't re-enter. A screw that spins uselessly in its hole gets wood glue plus two or three toothpicks, snapped flush, then the screw goes back in after 24 hours. And once a year, walk the house with a hex key retightening every cam lock; five minutes per room, and flat-pack pieces last 10+ years instead of five.
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Water is the only real enemy
Chipboard is wood chips and glue, and it drinks water like a marathon runner. A swollen base panel under a plant pot, or a bready-looking bottom edge under a sink cabinet, will never return to size — no hairdryer, no iron, no optimism. The repair is cosmetic triage: dry it fully (a week of air), trim the expanded fibres flush with a sharp knife, then flood the edge with PVA and clamp it flat. It won't look new, but it stops the rot from crawling further, which is the actual game.
Stripped screws: the toothpick trick
Every household learns this eventually: a cam bolt or hinge screw spins in its enlarged hole. Drip wood glue into the hole, push in 2–3 wooden toothpicks (or matchsticks — splint them first), snap them flush, wait a day, then drive the screw back in. The glue-and-wood plug grips the screw threads almost like virgin chipboard. Consumer repair columns — from WikiHow to The Spruce — have blessed this trick for years, and carpenters use a scaled-up version in real furniture.
| Problem | Fix | Prevention |
|---|---|---|
| Swollen edge | Dry, trim, PVA seal | Wipe spills within minutes; seal cut edges |
| Spinning screw | Glue + toothpicks, 24 h | Don't overtighten; hand-torque only |
| Racking wobble | Reseat back panel square | Check diagonals at assembly |
| Loose cam locks | Half-turn clockwise | Annual re-tighten round |
The annual re-tighten
Chipboard holds a screw well exactly once — re-drilling into the same hole is a downgrade every time. But cam locks and screws don't fail from weak material alone; they fail from a year of micro-movement. Beds especially: every sit-down is a small earthquake. A yearly pass with the hex key keeps joints tight enough that the material never gets the chance to chew itself.
Two habits finish the job: felt pads under anything that moves (they stop the dragging that loosens legs), and never mounting anything chipboard within splash range of a sink, shower or exterior door. Moisture plus chipboard is not a rivalry — it's a takeover.
When to give up gracefully
Some repairs fail the cost test: if a load-bearing side panel has swollen through, or the cam-sleeve holes have stripped into oval slots, the piece is structurally retired no matter how much glue you sacrifice. A good rule: repairs under £15 and 30 minutes make sense for anything that holds weight; beyond that, salvage the hardware (cam locks and dowels are reusable) and let the rest go. Furniture resale columns make the same point annually — condition decides second-hand value, and a wobbly, swollen bookcase is worth roughly its weight in firewood.
Keep a repair tin alongside the assembly kit: wood glue, toothpicks, a few spare cam locks and dowels (sold in multipacks for pennies), and a small paintbrush for flooding swollen edges with PVA. Repairs done within a day of the damage — the spilled drink, the window left open in a storm — succeed almost every time; the same damage left for a month is a permanent feature. Chipboard forgives speed, not delay.
Keep reading
More dimension guides are in the collection, and the full index is on the furnolio journal.
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