What is pressure treated lumber?
In: Engineering
Most wood, especially softwoods commonly used in construction, rots.
You can delay rotting by impregnating the wood with chemicals that make it unpleasant to the bacteria & fungi that rot the wood. But getting chemicals into the wood is sloooooow…unless you force it in with pressure!
Pressure treated wood is normal wood that they’ve punched holes/slots in, then forced a chemical solution in under pressure, then dried, leaving the chemicals behind. It lasts longer in wet/decay conditions than normal wood. Commonly used for fences, decks, the lower parts of foundations, playgrounds, anywhere that wood will routinely get wet.
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