If you suspect that you have an indoor air quality problem, you may want to begin by undertaking a home audit. Begin an audit by first taking a walk around the outside of your home. A quick assessment of your home's overall condition will help you identify problems that can allow both chemical and biological contaminants to get indoors. Some things to look out for are cracks, blockages, and problems with eavestroughs and downspouts. Cracks in your home's outer walls allow moisture to get in and provide a perfect environment for the growth of biological contaminants such as mould.
Cracks are also entry points for insects and rodents.
These systems are an essential part of keeping your indoor air clean. Look out for and fix any holes in your eavestroughing, and check to make sure that your downspouts are draining well away from your home. Poor drainage can cause moisture to seep inside your home, which can contribute to biological contamination. Odours in your home are an indicator of poor air quality. In addition, make sure that bathroom and stove fans are used regularly while cooking.