A long surface check on a bedpost is usually normal. A crack that crosses joinery, opens fast, or shows up with wobble is not the same thing. This Canada-first triage tool sorts likely cosmetic checking from call-the-maker-now problems and gives you a photo + question checklist before a warranty or dispute window drifts away.
What this tool is trying to separate
Normal checking is a surface drying crack that follows the grain and usually stays a cosmetic issue. Structural trouble is when the crack reaches a joint, opens through a load-bearing member, or arrives with wobble, rail looseness, shifting hardware, or fresh bug activity. The two get lumped together in buyer panic posts, but they should not be handled the same way.
Blunt rule: a long surface check on a stable post or decorative rail is usually watch-and-monitor territory. A crack through a joint on a bed rail, chair leg, or table base is call-the-maker-now territory.
Common Canada-specific triggers
Heating season: indoor air in Canadian winter can drop low enough to open fresh checks on kiln-dried wood.
Unheated cottages: spring opening and fall closing create big humidity swings, especially on beds, benches, and dining tables.
Garage or shed storage: mixed environments create movement and finish stress even when the piece looked fine indoors before.
Outdoor rustic pieces: seasonal wet/dry cycling turns small checks into bigger serviceability issues faster than indoor use.
Too-green construction: multiple fast-opening cracks in the first months can mean the wood was not stable enough when built.
Before you email the seller or maker
Photograph the full piece plus a close-up with a coin, ruler, or tape for scale.
Photograph the crack relative to the nearest joint, screw, bracket, or rail connector.
Note the room or property type: heated home, unheated cottage, outdoor, or storage space.
Write down whether the crack opened quickly or showed up gradually over a season.
Test for wobble carefully and record exactly what moves.