This video shows key parts of the canvas laying process on wooden roofed LMS Period 1 Third Open 7828.
© Alan Taylor
Draft Roof Specification — LNER Coach Association
Notes on the Covering of Wooden Carriage and Van Roofs — Bluebell Railway
— Eveleigh Work Days
Williamsons — The yellow peril used in the above video is roof canvas bonding, product code 7709657/12 from T&R Williamson Ltd.