In addition to many advantages when laying a metal tile the maximum angle of inclination is not standardized.
Greenhouse roof pitch.
Here s a great article on finding the perfect pitch for your solar greenhouse.
This will shed snow under most conditions but with twin wall coverings it is not always the case.
The graphic below helps flesh this out.
A lean to greenhouse extending 6 from your house needs a minimum 8 of height with an additional 4 for each additional foot the greenhouse extends from the building wall.
Metal the popularity of using this material for the roof of greenhouse photos confirm this is very high.
When choosing a roofing it is necessary to take into account the slope of the slopes.
The standard pitch for a greenhouse roof is 6 by 12.
In the write up it states the future greenhouse will have a simple shed style roof slanting to the south but with a much lower angle to allow for a knee wall which will push the ventilation wall further up.
I have chosen a 5 12 pitch for my greenhouse but ceres greenhouse states even a 3 12 is fine if you have a front wall with windows.
We recommend a 4 12 roof pitch as a minimum.
According to the conventional rule of thumb this would require roof glazing to be about 60 degrees off the horizon 40 20 60.
A greenhouse roof needs to have enough slope to prevent leaks and dripping condensation.