There are different options for insulating a greenhouse, they differ in terms of time and materials used. If only it is planned to build a greenhouse with year-round operation, then it is better to initially think over thermal insulation. After joining the sheets, it is necessary to seal the cracks and joints with a sealant and construction tape.
How to insulate the foundation and beds
The foundation is needed even with the seeming lightness of the structure. You can use a standard tape. It deepens deeper than the depth of freezing of the earth. Roofing material serves as additional insulation over the foundation. It is also necessary to carry out insulation on the outside of the greenhouse. For this, a sand layer of 40 cm is laid, and foam is also used.
The foundation can be insulated with expanded polystyrene or foam glass. Thus, the risks of rodents and excess moisture will be minimized. To warm the soil, you need to make high beds of 40 cm. Some gardeners put a heating cable under a ten centimeter layer of earth. This cable is powered by electricity.
There is a water system which is a safer method. It can be used to heat a small greenhouse.
Thin sheets of polycarbonate will not protect you from frost. It is necessary to arrange a sealing layer. The simplest option is film. She needs to line the structure from the inside.
Biological heating
The bottom line is that when organic waste decomposes, it generates heat. To use this natural process, you need to remove a layer of earth and pour a layer of expanded clay there. It is safe and keeps warm well. On top of the expanded clay you need to put paper, wood and stumps. The layer should turn out to be dense, so its decomposition will begin to occur slowly. The process will start when moistened with groundwater or artificial irrigation. Thermal energy will go directly to the root systems of plants. On top you can lay hay mulch and sheets 20 cm thick.
We must not forget about the biofuel layer - the main source of heat. You need to take compost, mix it with manure, shavings and sawdust. The thickness of this layer should be 20 cm. On top of this, black soil with peat is laid. The result is a tall bed.
Specially designed heating devices come to the rescue
If bio-heating fails, consider a solid fuel stove. Consumables here are firewood, briquettes and coal. Heat does not always spread evenly during heating. Some use electric heaters. They are safe and can work in conjunction with thermal sensors to maintain optimal temperatures.
Install such heaters only in areas with electrification. If the greenhouse is large, it will not be very profitable from a financial point of view.
Water heaters and special infrared equipment are also suitable for heating the greenhouse, which is also very convenient and efficient to use.
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