Here is a good website to reference for foam insulation:
http://energy.gov/energysaver/types-insulation
Types of Liquid Foam Insulation
Today, most foam materials use foaming agents that don't use ... read more
In our market (Wisconsin) we normally call the electrician for that work. The problem is that few trades are fully integrated. Often times the vent size will change and the electrician will not normal ... read more