With some strengthening and with the addition of two longitudinal runs of timber (boat-builders would call them stringers), it was time to contemplate the plastic covering. The roll of ‘super-heavy’ 254-micron film from Redpath was 10.7m wide and 24m long, covering a floor space 23m x 9m, and weighed 63kg. Not the sort of thing you chuck on your shoulder, race up a ladder and roll out while balancing both you and it atop a 50mm-wide ridgeboard!
After some discussion, two football post-like uprights were clamped to one end of the structure. Near the top, each upright sported wooden blocks forming an upward-facing recess, and above each recess hung a pulley. It was a simple