ash can be burn right away GREEN) due to its low moisture content, it would burn better after a few months of seasoning though,@Gavlar why do you think ash can be burnt green ? I mean why ash and no other species ?? It will be for next winter this lot ,but will be split soon , and stacked under cover to .
@not done it yet I'm well aware firewood needs to be "dry" as you call it , or seasoned as I and most other people call it .
Paid over the odds for a builders bulk bag like £80 and the moisture /steam was coming out of it and very little heat . I e it was cut /processed in spring and sat in a bulk bag for a few months before being sold .
@8ob well it's been lying there on a shingle bank /island just downstream of a road bridge , washed downstream during the last lot of storms /floods , I'm not sure how ash die back affects the tree? But the whole tree inc stump was there...
Seasoned? That is done to prepare timber for use in woodwork - so it does not warp or move while/after machining.
Burning logs simply need to be dried - water content simply reduces the amount of heat one can get from the timber. Water requires a lot of latent heat of evaporation, that simply disappears up the chimney - as well as preventing the wood from burning as well as it could.