Greenhouse Roof Angles

What the materials the roof is made of certainly counts.

Greenhouse roof angles.

Roof angle to catch sun and divert rain the point of a walipini is to allow for winter growing and in some cases more comfortable summer growing conditions. 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. Weight of them and weight on top of them like snow mentioned by pac is a great concern. I m not sure what the optimum for greenhouses is although following your stated numbers of 44 degrees latitude with the 20 plus or minus values gives you 64 degrees for winter and 24 degrees for summer.

Divide the first part of the ratio by 12 to work out the pitch. Solar greenhouse designers often cite a rule of thumb along the lines of. Why the design of your greenhouse roof matters. Ideally the roof should be facing directly at the winter solstice at a 90 degrees angle.

The best angle for greenhouse glazing in the roof is not as clear cut as some solar greenhouse designers make it sound. To convert between american roofing ratios and pitch degrees follow these steps. The angle of the roof will make a big difference in the sun s ability to heat your greenhouse. A 12 12 pitch roof has a pitch angle of 45.

Here s a great article on finding the perfect pitch for your solar greenhouse. Roof angles depend on a lot of things. Same approximate angles as your 90 degree calculation model. Find the inverse tangent of the pitch to find the angle in degrees.

Related to the roof slope is the freeboard the space between the lowest point of the roof and the ground. The slope of the sun collecting south face might appear to be trickier to decide upon. Framing and glazing materials. Take your latitude in degrees and add 20 degrees to it.

The angle does affect how well the translucent face collects sunlight but for greenhouses it s not as critical as when setting up a compact solar heating unit. Angles between 60 and 75 degrees for the north roof will work well in the united states and southern canada. The two most common framing materials are wood and metal. The squared edges could also be easily buffeted by wind potentially tearing the roof of your greenhouse right off.

While the logic behind this rule is sound it is a dramatic oversimplification that can lead to costly and. The ideal angle for the roof depends on your location. In order to create the angle use the excess soil you dug to build. What degree angle is a 12 12 pitch roof.

For the best results the internal angle of your roof will need to be between 53 to 73. When you are designing your greenhouse the best angle for your roof is determined through a simple rule of thumb.