Pitch Of Greenhouse Roof

The standard pitch for a greenhouse roof is 6 by 12.

Pitch of greenhouse roof. Thus the pitched model will be the right kind of roof of greenhouse. As you can see in the examples below a very steep roof pitch will create a very tall building with a much larger glazing area. This will shed snow under most conditions but with twin wall coverings it is not always the case. If you can afford to make this the snow will come off faster and not build up on it to cause collapse.

12 foot rise for 12 foot run. Framing and glazing materials. The second half has to do with the geometry of the greenhouse and the area of glazing. The most common materials used as greenhouse roofs include glass polyethylene film double layered panels of polycarbonate or acrylic and fiberglass panels or sheeting.

In the usa the range of standard pitches is anywhere between 4 12 and 9 12. These are also determined by the angle of the roof. We recommend a 4 12 roof pitch as a minimum. In addition the angle of inclination is determined using a specific roofing.

In the uk the typical house has a pitch between 40 50 although 45 should be avoided. The slope of such a roof will be determined by wind and snow load on the structure as well as attractive appearance. The more shallow the angle the more snow it will hold. 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.

That is the first half of the picture. Related to the roof slope is the freeboard the space between the lowest point of the roof and the ground. A greenhouse roof needs to have enough slope to prevent leaks and dripping condensation. Roof pitch varies depending on culture climate style and available materials.

A greenhouse roof is not one size fits all and effective greenhouse roofing can be achieved through a number of different materials. 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. If you design your internal structure according to local codes however you will not have any difficulties. 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.

A 45 degree angle is a 12 on 12 roof i e. Dec 30 2014 roof pitch calculator use this calculator to calculate roof slope roof pitch and common rafter length. 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. September 03 2020.