Have you considered using spray foam insulation in your building project?  If so, there is an informative article you should read.  However, before sending you  to the article, we would like to recommend that you to read the entire article; the reason being that some of the most important information is found near the end, where many readers are likely to have tuned out and made up their mind.  It turns out that most of the concern has to do with DIY folks being exposed to chemicals during installations and people moving back into spaces earlier than recommended.  Here’s the link to the article: EPA Raises Health Concerns with Spray Foam Insulation from BuildingGreen.com – Good readings and please drop us a comment to let us know what your thoughts are on this.