On the other hand, ground-contact pressure-treated wood is fortified with higher chemical retention levels, making it capable of withstanding constant exposure to damp soil and water.

In the meantime, copper-based ground-contact lumber is the best-selling consumer pressure-treated lumber, and some stores are phasing out non-ground-contact wood to reduce customer confusion about ...

Ground-contact pressure-treated wood is cured with more chemicals and is thus appropriate for use just above the ground, at ground level, or wherever ventilation is poor.

Pressure-treated lumber is rated by the amount of chemical infused in it per cubic foot of wood. This is stated on the tag stapled to the lumber's endgrain. Ground-contact rated lumber has .40 ...

If you decide to use pressure-treated lumber for a project, ... A rating of 0.40 means the wood is acceptable for ground or freshwater contact and can be used for posts and landscape timbers.

Pressure-treated lumber was first patented in 1938 and has been used for over 60 years ... because they are made to be stuck into the ground, where the wood is in contact with the most moisture. ...

Any lumber that gets frequent moisture, vegetation, poor circulation of air and anything less than a foot off the ground should use “ground contact pressure treated wood”.

And no matter what the walking surface is, the supportive structure beneath the deck will be pressure-treated wood, because none of these […] Skip to content All Sections ...