Is Delta-FL a safe product?

— Lea Bergenfield, NJ

Answered by Susan Davis on January 18, 2011

What kind of waterproofing can you use in crawlspaces to help with going green?

— Michael Deal Charlotte, NC

Answered by Danny Kelly on August 30, 2010

How would you preserve a turn-of-the-century rock wall in a moist basement?

— Mike Bowers, Mishawaka, IN

Answered by Timothy Montgomery on September 4, 2009