The face off between the two was sparked when the american wood protection association rewrote its guidelines identifying which type of pressurized lumber should be used under various circumstances.
Difference between ground contact and pressure treated wood.
Can only be used when the wood has proper ventilation and drainage.
August 18th 2017 how to properly choose treated wood.
Ground contact pressure treated lumber can be used either above ground or in contact with the ground.
Can be used in applications that are easily maintained or replaced.
As the names suggest ground contact lumber is treated to a standard to withstand rot and decay even at the point where the lumber physically touches the ground water or leaves.
Above ground lumber is treated to a lower standard of resistance.
Choosing the right type of pressure treated wood.
To obtain the maximum performance out of your treated wood for any outdoor project you need to choose material that is appropriate for the conditions in which it will be used.
For outdoor projects it s important to understand the difference between ground contact treated wood and lumber designed for above ground use.