A channel is fixed to the floor and trailer in which the 750mm aluminum and PIR panels fit. Each wall section is then prepared with windows cut out and electrical wiring channels prepared. Once each section is ready the are hoisted up and lowered into position. Critical at this point is ensuring everything is perfectly square which sounds easy, but there is a lot of movement on the single 3.1m panels until the whole structure is in place. The aluminum and PIR panels are extremely strong, light and provides far superior insulation than panels constructed with polystyrene and colorsteel. Read more about the comparison between the panels here.
