Fastening a greenhouse without a foundation is an inexpensive solution if the building is exclusively covered with foil and is not heated. However, the rearing options remain limited in the event of heat loss, since tropical exotic species often do not tolerate temperature fluctuations in the long term.
There are several ways to mount a greenhouse
Although the simple foundation is less work than many think, it doesn't necessarily need to be poured in solid concrete over the entire surface of the greenhouse. Especially not if the significantly lighter foil cover is chosen instead of glass roofing. However, you should keep in mind: Fixing the greenhouse does not only mean that your structure stable in the vertical direction and does not sink into the ground, but it also absorbs side pressure the house walls, which is caused by the acting wind forces. Building without a foundation can therefore easily lead to problems with free-standing and large-scale greenhouses.
Frame construction for the substructure
The small greenhouses with foil roofing that are available from specialist dealers are already delivered from the factory with a mostly metal frame that only needs to be put together or screwed together. Steel ground spikes are often included with such sets for attaching the greenhouse so that you don't need a foundation. Similar to the tent, these holding devices must then be sunk as completely as possible into the ground, otherwise they could pose a risk of injury, for example to children running by. However, if the manufacturer of your prefabricated house points out in the supplied construction documents that a greenhouse attachment without foundation to static problems can lead to, a mason's trowel should be used before assembling the parts.
Fasten a homemade greenhouse
For smaller greenhouses (77.12€) that are attached to an existing residential building, for example, you can do without a foundation. Unless it is important to have solid ground under your feet. In such cases, solid wooden beams that lie completely horizontally on the ground can be used as a substructure. In terms of energy, however, this lightweight construction has disadvantages in terms of the heat balance in the house. Without a foundation on the greenhouse that seals tightly to the outside the heat loss is correspondingly high, which in extreme cases can affect the optimal growth of the plants or the crop yields when growing vegetables.
tips
A greenhouse usually stands for years, if not decades. If you build without a foundation, the assembly is only cheaper at first glance and is faster. If, on the other hand, you attach the greenhouse with simple point foundations, the energy loss decreases as the house becomes more stable and the plants do noticeably better.