Spalted black line maple firewood: BTU, weight and seasoning

Heat per cord

Spalted black line maple is a hardwood. At 20% moisture, a full cord holds about 25.7 million BTU of heat (27.1 gigajoules). Wetter wood gives less, because part of the heat goes into boiling off the water.

That ranks spalted black line maple 269th of the 558 species in our tables, from the hottest down.

Weight and density

A full cord of seasoned spalted black line maple (20% moisture) weighs about 4,180 lb (1,900 kg). Freshly cut, the same cord weighs about 5,020 lb (2,280 kg): the difference is water you don't want to burn.

Its specific gravity, a measure of density, is 0.71. Denser wood packs more heat into each cord.

Seasoning time

Split and stacked off the ground, spalted black line maple needs at least 11 months to dry to about 20% moisture.

Wood dries faster once it is split and stacked with air around it. A moisture meter on a fresh split face tells you when it is ready.

How it burns

• Ash: low
• Coals: very high
• Burn time: very long

We rate spalted black line maple 6 out of 10 as firewood: a good choice.

Similar firewood

Other species to compare with spalted black line maple:

• Ambrosia maple: 22.3 million BTU per cord
• Bigleaf maple: 19.9 million BTU per cord
• Birdseye maple: 25.7 million BTU per cord
• Black maple: 23.4 million BTU per cord

Where these numbers come from

The heat and weight figures come from our firewood tables, worked out the same way for every species at 20% moisture. See how we calculate them.

Questions