This is a summary. To read the whole story subscribe to BostonGlobe.com
Q.Recently, my wife and I had a carpenter install new energy-efficient Andersen windows and a new slider into our house. The carpenter told me that he put in some insulation around the new windows and door. We are doing some interior work on the house and a person at a local insulation company suggested that I purchase some low expansion insulation foam. My carpenter said spraying the insulation can make windows hard to open, by gumming up the mechanics. What’s your take on this insulation?