 From the 1930s through the 1940s the company shifted to manufacturing pre-built windows and doors to supply the post-war boom in housing construction.In the 1980s Loewen combined the company’s old-world craftsmanship and work ethic with the most advanced production technology available at the time.Through the 90's, Loewen expanded its distribution into the United States and became one of the leading suppliers of high-end, custom wood windows and doors.