280-day drying: 6–8% moisture and ±0.5 mm geometry
280 days of kiln and thermobaric drying is Cardinal Hall’s standard for stable plank geometry (±0.5 mm) and 6–8% moisture. Short market drying saves warehouse time but leaves stress in the timber — gaps and movement appear years later at joints with doors and kitchens.
What short drying leaves behind
Moisture leaves the surface faster than the core. The plank looks ready, but residual stress shows after install: micro-gaps, cupping, tone drift after finish.
With underfloor heating and variable indoor humidity the risk rises. Drying is matched to the residence climate, not only the delivery calendar.
280 days: kiln and thermobaric loop
A long cycle equalises moisture across the section. ±0.5 mm production control reduces error stack-up when joining to door leaves and fronts.
Finish (oil/lacquer) goes on a stabilised surface — less seasonal tone drift and easier reorder from the same-lot sample archive.
Tied to single batch
Drying is part of the single-batch protocol: one lot, one regime, one finish schedule for floor, kitchen, doors and stairs.
See the single-batch guide and the floor+kitchen article for the full interior logic.
Frequently asked questions
Can drying be shortened for a rush project?
The object calendar is set in the contract. We do not cut drying — it directly affects geometry and longevity. We optimise logistics and install stages instead.
Related sections
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