Even at the initial stage of planning a greenhouse, it is important to decide what its size and shape will be. In this case, a variety of factors should be taken into account, for example, the size of the plot, how many plants are planned to be grown, what is located or grows nearby, what space will be occupied by adult plants in the greenhouse, and much more.
If the site is small and a little plant will be grown in the closed ground, then, accordingly, the dimensions of the greenhouse being built by one’s own hands can be small. The form of construction is determined by the type of plants that will be grown in it, and the preferences of the owner of the site. And do not forget that the greenhouse should delight not only the crops are grown in it but also its appearance.
Greenhouses are arched, gable, spherical or wall. The best forms of do-it-yourself greenhouses are arched and gable, like an ordinary house.
For such low crops like pepper, eggplant, undersized varieties of tomatoes, a greenhouse with an arched frame is suitable. It is more expedient to use a gable greenhouse for growing high crops – cucumbers, tall varieties of tomatoes – or flowers.
Since spherical bodies retain heat best, arched greenhouses come closer to the ideal than any other. But in such structures, it is impossible to grow tall plants, since the inclined walls will impede their normal growth.
The greenhouse should be as low as possible, then solar energy will be used most efficiently. If you make the roof of the greenhouse high, warm air will accumulate at the top, and the plants and soil will remain in the cold zone. However, tall plants require space, and in addition, in a low greenhouse, it will be extremely difficult for a person to take care of the plants.
In this case, it is necessary to correctly calculate the optimal dimensions of the greenhouse, correlating them with the height of adult plants, and also to facilitate the work, dig a trench for a passage about 1 m deep in the middle of the structure in its entire length.
Orientation to the cardinal points also determines the requirements for the shape of the film greenhouse, built by yourself. Since the entire stream of sunlight falls mainly on the south side of the structure, the north remains more vulnerable in terms of exposure to cold air. That is why it is better to make this side of the greenhouse from an opaque material, paint it from the inside with white glossy paint, cover it with foil or insulate it.
Based on all this, the ideal greenhouse appears to be trapezoidal in shape, with a higher and warmed northern wall and a lower southern and inclined flat roof.
The following describes how to properly make a foundation for a greenhouse with your own hands.