Whether purchased as a prefabricated kit or as an individual one-off and built piece by piece yourself - you should anchor the new greenhouse very carefully. After all, every morning it has to be in the exact same place where it was left the night before. With the classic foundation made of concrete, the highest stability is achieved and it can also be erected quite easily and inexpensively on your own. In the case of prefabricated houses, a special fastening kit is often included in the scope of delivery, which consists of pillars and eyelets to be embedded in the ground and which can be anchored to the greenhouse with the help of steel cables.
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Foundations - easily made by yourself
Basically, most hobby gardeners choose one of the three following options for anchoring the greenhouse, all of which offer a high level of security. A distinction is made between:
- Closed foundation slab made of poured concrete;
- Strip foundation for the side walls;
- Point foundation below the beam;
It should be noted that, depending on the size of the new greenhouse building, a building permit may even be required in some federal states. It is also important to consider the optimal and usually final location selection , since later corrections can hardly be made without great effort. If you intend to use the greenhouse all year round and additionally heat it if necessary, the closed foundation plate is the optimal solution.
Anchor the greenhouse, preferably also frost-proof
This means that the depth of the construction pit should be between 60 and 80 cm, which, in addition to the desired stability, later also enables the plants to grow under optimal climatic conditions and heating energy is only required very moderately. We recommend using ready-mixed concrete, which is available as dry mortar in all major hardware stores. Mixed with water, the concrete only needs to be filled into the prepared construction pit and, as can be seen from the manufacturer's documentation, hardened for a few days. The concrete layer should be at least 20 cm thick; the excavated foundation can also be filled with gravel before cementing. The anchors necessary for proper statics, with which the greenhouse frame is screwed after it has dried out, also come into the foundation.
Anchor the finished sets to the greenhouse
In terms of the basic principle, these kits work in a similar way to a point foundation, with the exception that the anchors are embedded in the ground a little outside the outer walls. As a connection to the greenhouse, several steel cables are laid over the roof , which are firmly adjusted on the opposite side. There are manual tensioning devices that are designed to ensure that the metal ropes are as close as possible to the outer shell of the greenhouse. Purely in terms of aesthetics, however, the concrete foundation described above would certainly be more attractive.
Tips
So that everything fits later when anchoring the greenhouse, this comparatively small foundation should also be precisely staked out with a batter board. The absolute ground level and perpendicularity not only looks good afterwards, but also increases stability and safety.
