A Walipini greenhouse, also known as a pit greenhouse or underground greenhouse, is an efficient and cost-effective way to grow food year-round, especially in colder climates. The name “Walipini” comes from the Aymara language of Bolivia and means “place of warmth.” By utilizing the Earth’s natural insulation and capturing solar energy, a Walipini creates a stable, warm environment for plants, even in harsh winters. Here’s how to build one:
- Choose the Right Location • Sunlight: Select a site with maximum exposure to sunlight, especially in winter. The greenhouse should face south (in the Northern Hemisphere) or north (in the Southern Hemisphere) to maximize solar gain.
• Drainage: Choose well-draining soil or a slightly sloped site to prevent water accumulation.
• Wind Protection: Build in a location sheltered from strong winds, which can affect heat retention. - Plan the Design • Dimensions: Common sizes range from 8-12 feet wide and 20-30 feet long, but it can be customized based on needs.
• Depth: Dig about 6-8 feet into the ground. This depth provides natural insulation from the surrounding soil.
• Slope: Create a slope on the roof to optimize solar heat capture and allow for rain or snow runoff. - Excavation • Dig the Pit: Excavate the chosen area to the desired depth. Ensure walls are smooth and reinforced to prevent collapsing.
• Incline Floor Slightly: A slight slope (1-2%) toward the rear can help with water drainage. - Insulation and Wall Construction • Wall Material: Use materials like rammed earth, bricks, concrete, or stone to retain heat. Insulated walls on the north and east sides are ideal for retaining warmth.
• North Wall: Build a thick, insulated north wall to reflect sunlight and trap heat inside the greenhouse. - Roofing
To continue reading the article please see page 2
Pages: 1 2
