One of the most important points to be considered before the beginning of a greenhouse construction project is careful planning. Constructing a greenhouse is not a very time consuming and expensive task but the ultimate choice depends upon the home architecture, desired growing space, costs and available sites. A greenhouse should provide proper environment for the growing of plants. The things you must keep in mind while constructing a greenhouse include:
During greenhouse construction, you must given attention to the location where it has been built. The place where it has been constructed should receive maximum sunlight all day. Eastern side location receives most sunlight and as this location receives sunlight in the morning itself, the food production of the plants begins early and is thus maximized. If you are going to grow plants that need less sunlight, then northern side is preferable, otherwise it is the least desirable direction for a greenhouse. Good drainage facility is also important for the location of the greenhouse. Prefer to build it above the ground level so that the irrigation water and rain water drains away quickly and easily. Other considerations for the site of the greenhouse include light requirements, electricity, water and heat facilities and protection from the winter wind.
You should be careful while selecting framing materials and greenhouse frames for greenhouse construction. They can be made up of galvanized steel, aluminum and wood. Plastic pipes are usually inadequate for meeting wind and snow load requirements. Frames may also be covered with rigid fiberglass, glass, plastic film and double wall plastics.
Floors and foundations:
Permanent foundations are required for fiberglass, glass and double layer plastic sheet rigid materials. Most of the home greenhouses need concrete foundation same as residential houses foundation. Permanent floorings are not recommended as they can stay wet and become slippery due to the soil mix. A walkway of gravel, concrete or stone can be constructed for providing easy accessibility to the plants. Rest of the area must be covered with gravel so that excess water is drained.
The heating conditions depend upon the required temperature of the plants and location of the greenhouse construction. An electric heater of 200 volts is efficient, clean and can work well and a small oil or gas heater designed for being installed on the masonry wall is also good. The heating systems may be fueled through electricity, wood, oil or gas and heat may be distributed through radiant heat, forced hot air, steam or hot water.
Air Circulation and Ventilation:
You will need to uphold the circulation of air so that the temperature remains uniform inside the greenhouse. A fan in forced air system of heating may be used for providing continuous circulation of air. Fans should be wired to a switch so that it may run continuously and be separate from the burner. Ventilation is extremely essential for controlling temperature, removing moisture and replenishing carbon dioxide. The ventilation requirements are different, depending upon the season and the weather.
If you keep all the above things in mind while greenhouse construction, you will have a greenhouse that is the greenest of all.