Half of the mills' output was shipped to England; the rest to the United States and throughout Canada. White pine from Booth's lumber yards was used to build the decks on the ocean liners of the Cunard Line, including the "Lusitania" and "Mauretania". In 1905, he constructed a new plant and entered the pulp and paper business, thus being able to use softwood that he had been previously forced to sell. He expanded into the United States through the establishment of docks and a distribution centre at Rouses Point, New York, a planing mill and box factory at Burlington, Vermont, and a sales office in Boston.