What is the main reason gardeners prefer double-walled glazing over traditional glass in greenhouse construction?

Gardeners prefer double-walled glazing for greenhouse construction primarily because of its greater insulation capability. Double-walled glazing consists of two layers of glass with an air or gas-filled space in between, which significantly reduces heat loss compared to traditional single-pane glass. This improved insulation helps maintain a more stable and warmer internal environment, particularly important for plant growth, extending the growing season and improving energy efficiency.

While lower initial cost and lighter weight could be advantages in specific contexts, they are not the main reason for choosing double-walled glazing. Better soundproofing is generally not a primary concern for gardeners; instead, the focus is on thermal performance to optimize the conditions for plants. Thus, the primary benefit of double-walled glazing in a greenhouse setting is its ability to provide superior insulation.