Ready-Made Polycarbonate Greenhouses: Comparison of Popular Shapes and Sizes

Ready-made polycarbonate greenhouses are sold in three main shapes, and the difference between them is not only aesthetic. The shape of the structure affects the snow load, the amount of usable space inside, and the convenience of placing tall plants. Let's compare the most popular options.

Arch (Arched) Greenhouse

The most common shape due to its ease of assembly and good resistance to snow loads—the rounded surface prevents snow from accumulating as actively as on flat slopes. Among the disadvantages is that the walls of an arched greenhouse have less usable height, which is inconvenient for tall crops near the edges of the structure.

Gable (House-Shaped) Greenhouse

A shape with straight walls and a triangular roof provides more usable space throughout the entire height of the structure, which is convenient for tall plants like tomatoes or grapes. Such a greenhouse usually requires a more complex frame assembly compared to the arched one, but it wins in internal space ergonomics.

Lean-to (Wall-Mounted) Greenhouse

A compact option that adjoins the wall of a house or utility building on one side. It saves space on the plot and partially utilizes heat from the building's wall, but is inferior in area to freestanding structures of the same foundation footage.

How to Choose the Shape for a Specific Plot

For a narrow, elongated plot, an arched greenhouse is more convenient—it is visually more compact and fits more easily into a limited space. For a plot with sufficient room and a desire to grow tall crops across the entire width of the structure, a gable greenhouse with straight walls is preferable. A lean-to greenhouse is the optimal choice when the plot area is particularly limited and it is crucial to maximize the efficiency of every square meter near the house.

Standard Foundation Sizes

Most often, ready-made greenhouses are offered in a standard width of 3 meters with a length from 4 to 10 meters in 2-meter increments—such modularity simplifies material calculation and allows purchasing an extension section in the future without recalculating the project from scratch.

Ready-made greenhouses of various shapes and sizes are presented in the Polik catalog, where you can select a structure to match your plot area.