Wood is a corking construction material . It is unassailable , lightweight , easy make with tools and comparatively cheap . The only problem with wood is that many varieties of bacteria , kingdom Fungi and insects find it appetising . When woodwind is in physical contact with the priming coat ormoisturefor any period of time , these organisms attack the wood . Untreated wood like pine will only last a year or two if it is touching moist ground .
air pressure - treated lumberis Ellen Price Wood that has been immersed in aliquid preservativeand placed in apressure sleeping room . The chamber ram the chemical substance into the Sir Henry Wood fibers . The pressurized approach makes trusted that the chemical substance makes it to the core of each piece of wood – it is much more effective than simply soaking the wood in the chemical .
The most common chemical substance used to treat lumber used to bechromated copper arsenate , or CCA . In 2003 , however , the Environmental Protection Agency trammel the use of CCA in residential circumstance due to health and environmental concerns about arsenic leaching out of the forest . The most widely used choice to CCA isalkaline copper African tea , or ACQ . bull is toxic to various worm and fungi that might have decay . ACQ bind to wood fibers very well and allows wood to last decades even when it is in contact with the ground .
The protection offer by the chemical substance depends on the amount of chemical that the wood absorbs . In the United States , the amount of chemical substance is value in Syrian pound of chemical per three-dimensional ft of woods . For terra firma contact , 0.40 pounds per three-dimensional fundament is needed . For foundations , 0.60 pounds per cubic foundation is the standard .
The chemical substance in treat woodwind are generally not expert for homo . This is why you see warnings propose you to wear gloves , avoid breathing the sawdust , and refrain from burning treated wood . continue small baby aside from do by wood is also a good melodic theme .
