On July 31, 2020 at 09:38, buzz said...
We have a customer who does woodworking for large projects, such as world class concert halls. He must deal with trimming out the venue while the concrete is still giving up its water. The atmosphere will not reach its ultimate climate controlled humidity for weeks at least. Wooden flooring contractors will deliver the wood a few days in advance in order to allow the planks to adjust to local conditions which might be quite different from the warehouse.
The shrinkage is one reason a lot of contractors use Poplar and MDF for paint-grade trim- it doesn't shrink as much and they don't need to send the painters back to fill gaps.
Ever wonder why a lot of antique tables only have three legs?