Dean continues with listener calls tackling problems about: leak in a unit that needs repair and mold remediation, the pros/cons of switching from regular water heater to tankless, a plumbing issue leading to sewer pipes involving tree roots and whether a trenchless solution, which is more expensive, is better than traditional repair and how to deal with a small area of a roof where shingles were missing and a patch was made only nailing down tiles rather than using glue but now the shingles are lifting.