The leaky homes crisis is an ongoing construction and legal crisis in New Zealand concerning a number of timber framed buildings constructed from 1994 to 2004 that suffered from weather-tightness problems. The problem was primarily related to the decay of timber framing which, in extreme cases, made buildings structurally unsound. Some buildings became unhealthy to live in due to moulds and spores developing within the damp timber framing. The repairs and replacement costs that may have been avoided were estimated in 2009 to be approximately $11.3 billion.