Pressure Treated Timber
All
measures that are taken to ensure a long life of wood fall under the definition
wood preservation (timber treatment). In moist and oxygenated soil, there are
few treatment enabling vulnerable wood (softwood here) to resist for long
bacterial and fungal degradation. Apart from structural wood preservation
measures, there are a number of different (chemical) preservatives and
processes (also known as timber treatment, lumber treatment or "pressure
treatment") that can extend the life of wood, timber, wood structures or
engineered wood. These generally increase the durability and resistance from
being destroyed by insects or fungus. reated wood was used primarily for
industrial, agricultural, and utility applications, where it is still used,
until its use grew considerably (at least in the United States) in the 1970s as
homeowners began building decks and backyard projects. Innovation in treated
timber products continues to this day, with consumers becoming more interested
in less toxic materials.
This is great post about pressure treated timber.
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