How long does formaldehyde continue off-gassing from building materials?

Formaldehyde off-gassing can continue for months or even years after installation, depending on the materials and environmental conditions. Pressed wood products, adhesives, and insulation materials release formaldehyde gradually over extended periods, with levels often highest immediately after installation. Temperature and humidity affect off-gassing rates, with warmer conditions typically increasing chemical release. This ongoing contamination means buildings can develop formaldehyde problems long after construction or renovation is complete. Professional testing helps determine when off-gassing has subsided to safe levels and identifies if ongoing contamination requires mitigation measures.

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