- It depends on the optimal alignment
- First from east to west or the other way around?
- Always carefully align the foundation
Even if erecting a greenhouse is a small structure, the alignment of the construction should be done carefully and according to certain individual aspects. How, where and what should later be under glass is just as important as the correct installation of the building.

When building light greenhouses that are not too large, you can usually do without a solid foundation over the entire base area. Here it is sufficient if base foundations are poured under the walls for support. In the case of foil houses, on the other hand, you can easily get by with point foundations at the corners, which only require a small amount of work to set up the greenhouse.
It depends on the optimal alignment
A particularly important aspect that will significantly influence the indoor climate in the greenhouse is the orientation of the roof construction. The higher and steeper it is mounted, the more balanced the climatic conditions are for your plants. Low, narrow houses with flat roofs heat up far too quickly in the summer and the risk that plants will wither quickly is therefore higher. A greenhouse should always be set up in places where the sun can spoil the plants with light and heat for about 10 hours a day. Whether it is the morning or afternoon sun is completely irrelevant.
First from east to west or the other way around?
It doesn't matter nowadays. Whether the ridge of the roof points from south to north or east to west is not very important each of these two orientations has its advantages as well as disadvantages. Decisively more important is a place where the installed greenhouse fits in as harmoniously as possible with the existing garden structure. In the case of a possible slope, it must be ensured that any rainwater that may penetrate, for example if the building is built without a foundation, cannot penetrate or accumulate for a long time. An additional drainage can help here if necessary and can be dug out in a short time.
Always carefully align the foundation
The idea that a plant house measuring 3 x 4 meters weighs around 250 kg already makes it clear that solid construction is basically not necessary. Much more important when setting up a greenhouse is that your concrete, brick or wooden foundation is exactly at an angle and that the surface is actually horizontal to the millimeter. In addition, it should be noted: The strength of the Subfloor must be high enough, so that the greenhouse frame can be securely screwed on with dowels.
tips
Plan for a slight gradient for the foundation in the longitudinal direction to the entrance door (approx. 15 mm over a length of three metres). This allows the rainwater to flow out of the longitudinal profiles or the eaves on the inside towards the front.