The classic cord: 128 cubic feet of logs and air.
Arrange for proper air flow and drainage when stacking firewood. A peaked roof of overlapping splits, shingles, tarp, or plastic will do the job nicely.
ILLUSTRATION: JANNA BENNING
Top: Don't stack too tightly. Allow drying air to get at the logs. Bottom: Stack with irregularities in the pile, avoiding long vertical seams that might collapse.
A Shaker round covered with thick shingles and surrounding a holed plastic leach field drainpipe.