I think I already know the formula, but wanted to check if there are any instances where this may not work. I have been estimating construction costs for 5 years and haven’t found one instance where the following formula doesn’t give the correct answer:
Incline area = flat area (measured on plan)/cos (pitch in degrees)
So far this has worked for:
- Square, rectangular, hexagonal, circular, curved edge roofs
- Roofs of varying pitches eg. 5 degrees one side, 10 degrees the other. Just measure 2 separate areas and use the formula
It wouldn’t work for: - Roofs that are arced or domed vertically
Can anyone prove me wrong because I’ve seen so many people losing their mind over something so simple?