Roof pitch varies depending on culture climate style and available materials.
Greenhouse roof pitch uk.
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.
A steep roof pitch also means that there will be more working height above the greenhouse staging.
12 foot rise for 12 foot run.
In the usa the range of standard pitches is anywhere between 4 12 and 9 12.
There is no standard universal roof pitch.
In areas with heavy snow at least 3 or 4 feet is good to have so that snow won t pile back up onto the greenhouse roof or obstruct any vents.
The two most common framing materials are wood and metal.
Related to the roof slope is the freeboard the space between the lowest point of the roof and the ground.
Framing and glazing materials.
This reinforces the natural chimney effect of hot air rises.
We recommend choosing a practical height usually a maximum of 9 11 for residential solar greenhouses and then using the adjusted rule of thumb to ensure that the glazing meets the minimum pitch for light transmission.
Obviously aluminum and glass or lexan would weigh less than wood and glass or lexan but if your issue is angle then you have to consider the weather.
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.
A 45 degree angle is a 12 on 12 roof i e.
In the uk the typical house has a pitch between 40 50 although 45 should be avoided.