I have just received a quote for re-roofing our three bedroom house with colorsteel corrugated iron. At $9700 + GST it was a bit more than I anticipated. Perhaps it is the OSH regs mentioned in earlier posts.
On our roof there is a change of pitch of 6 degrees. There is a 5.2m length, a 6 degree change of pitch, thence another 2.7m. The roofer, on consideration, felt the best solution was to bend the iron at this join. I think his yardstick was that it is less than 8 degrees. He guessed, rightly, that it was.
Reading other posts here, whereby "Little dents become holes, holes become splits through expanding and contracting", I am a little concerned this may impact the life of the roof?