Heron House, constructed in the mid-1960s, was the first residential building constructed in Lake Anna Village Center. The building comprises forty-six condominiums with concrete balconies. In 2002, the condominium association replaced the original steel-framed windows with aluminum fixed-framed and casement windows and undertook concrete repairs at window surrounds. Following this work, unit owners reported water leakage around windows openings. SGH investigated the cause of leakage at the fifteen-story, cast-in-place concrete structure.