It was during his time in Moose Jaw that Lach met his future wife, Kay Fletcher. Lach had a job reading meters for the National Light & Power Co., and one day he met Kay in her home. They married in 1941. That same year, Lach's mother died and his father moved to Vancouver, beginning a lifelong estrangement from his son. In 1945, Elmer and Kay celebrated the birth of their only child, son Ron. Ron was born while Elmer was on the road with the Canadiens. According to Montreal Gazette columnist Dave Stubbs, Elmer wired Kay the message "Nice going, honey."
