I always heard wood should be dried to 8% to 10% for woodworking.
My meter shows 12% to 14% for lumber (various species) that has been stored indoors for over 10 years. In fact, I got that same reading from the cabinets I have in the garage, wood trim around the doors, and even from the sheetrock. How could I ever expect to reach 8-10 percent if everything is at 12% to 14%?
Out of curiosity, I measured some "green" 2x4's I picked up today for a remodel project and they came out around 14% to 16% on average too.
For that matter, measurements of my deck railings, and plywood siding came out around 14% to 16%.
My seasoned firewood averaged around 16%.
The only wood I got a higher reading with was my rotting wood chopping stump that registered around 30% moisture. :)
Admittedly, we have had a very wet spring here in the Pacific Northwest, so maybe 12% to 16% is just to be expected?