If you don't know how dry it is, you're best playing safe. Air drying per " of thickness should take around a year to bring it down to 20%ish MC (moisture content) but this is not low enough for CH houses. Further conditioning in a moderately cool room (a bedroom is ideal) is needed to bring it down to around 8-9% which could take several months (at least over the winter) so that you'd be ready to start the making in the Spring (assuming that your 'shop has no heating) - Robsrt":39bxswzw said:Hello all again i have some oak semi prepared for a chair its all about 22-25 mm thick and i have it in the house to acclimatise,how long should i keep it in for before working with it roughly?
...in which case the MC will be higher than when originally kilned. Imagine timber as a sponge, soaking up and giving up moisture according to the prevailing conditions. If it was dry straight out of the kiln and it's been outside where there's more moisture in the air, the MC will have risen. Best to further condition it indoors for a few months at least, making sure that there are sticks 'twixt each board - Robsrt":1ukcfxlf said:i bought this a couple of weeks ago from my local timber merchant and it is kiln dries but was siiting out in their timber shed.