Even here in mild climate San Diego the air tight house is mandated. Kind of silly when you consider most people here leave doors or windows open almost all year. I have always eliminated black mold with a bleach spray. I guess this is just another lawyer get rich quick scheme.
Even here in mild climate San Diego the air tight house is mandated.Excellent point. The biggest problems arise because structures are not designed around their climate.
Go to www.buildingscience.com for a lot of really great information about this topic.