Pitch Of Greenhouse Roof

September 03 2020.

Pitch of greenhouse roof.

Wardle last modified date. 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 45 degree angle is a 12 on 12 roof i e. 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.

Roof pitch varies depending on culture climate style and available materials. The two most common framing materials are wood and metal. In addition the angle of inclination is determined using a specific roofing. The most common materials used as greenhouse roofs include glass polyethylene film double layered panels of polycarbonate or acrylic and fiberglass panels or sheeting.

A greenhouse roof needs to have enough slope to prevent leaks and dripping condensation. The slope of such a roof will be determined by wind and snow load on the structure as well as attractive appearance. This will shed snow under most conditions but with twin wall coverings it is not always the case. The more shallow the angle the more snow it will hold.

In the uk the typical house has a pitch between 40 50 although 45 should be avoided. We recommend a 4 12 roof pitch as a minimum. In the usa the range of standard pitches is anywhere between 4 12 and 9 12. 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.

Related to the roof slope is the freeboard the space between the lowest point of the roof and the ground. 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. The standard pitch for a greenhouse roof is 6 by 12.

Dec 30 2014 roof pitch calculator use this calculator to calculate roof slope roof pitch and common rafter length. Thus the pitched model will be the right kind of roof of greenhouse. The second half has to do with the geometry of the greenhouse and the area of glazing. 12 foot rise for 12 foot run.

If you design your internal structure according to local codes however you will not have any difficulties. A greenhouse roof is not one size fits all and effective greenhouse roofing can be achieved through a number of different materials. These are also determined by the angle of the roof. If you can afford to make this the snow will come off faster and not build up on it to cause collapse.