Ask This Old House (2002)

S3E11 Ladder Safety; What Is It? Replacing an Old Retaining Wall

Kevin steps out of the barn to get some ladder safety tips from expert John Drengenberg. Once they’re up in the loft, Kevin, Tom, Richard, and Roger ponder, "What Is It?" Meanwhile, Roger teams up with homeowner Colin White from Wakefield, Massachusetts, to repair a deteriorating retaining wall by using interlocking concrete blocks.