I live in an attached house (on both sides). Do I need to insulate my basement?

— DESIREE GARY Saint Albans, NY

Answered by Danny Kelly on August 24, 2010

Is fiberglass insulation or blown in insulation the best?

— Susan Franklin, TN

Answered by Randy Potter on July 1, 2010

Is closed-cell foam -- sprayed in -- OK to use for an entire house in southeastern PA?

— Nelson Nafziger Parkesburg, PA

Answered by Sean Lintow Sr on May 25, 2010