Pressure treated wood is typically used in outdoor projects due to its resistance against rot, fungus and insects; however, some individuals wonder whether or not this type of wood could also be used indoors. Unfortunately, the answer doesn't lie simply with one yes or no answer but depends on several variables.
First and foremost, pressure treating chemicals are hazardous to both the environment and human health. Arsenic and copper compounds found in pressure-treated lumber may leach into nearby soil and water supplies and cause contamination, potentially polluting groundwater supplies as well as creating long-term environmental issues - making proper disposal crucial.
Pressure-treated wood releases volatile organic compounds (VOCs) into the air that may adversely impact human health, leading to symptoms like respiratory irritation and skin rashes. Therefore, when used near food, children or animals, clear sealers or stains should be applied as protection from VOCs escaping.
Before choosing pressure treated wood for an indoor project, it's essential to carefully consider these factors. As a rule of thumb, pressure treated wood should only be used indoors for framing and structural support purposes; untreated wood usually makes a better choice because it's lighter compared to treated wood, more attractive, and doesn't contain harmful chemicals that could pollute indoor air quality.
Treated Wood Fact Sheet
Lumber Pressure Treated With Chromated Copper Arsenate - NYDEC
