Preventing heat loss in a winter greenhouse requires proper insulation, strategic heat retention, and minimizing air leaks. Using double-layered polycarbonate or glass glazing helps trap warmth while allowing sunlight to penetrate. Sealing gaps with weatherstripping or caulk prevents cold drafts from entering and warm air from escaping.
Thermal mass, such as water barrels or stone floors, absorbs heat during the day and releases it at night, stabilizing temperatures. Insulating the north wall with materials like rigid foam or reflective barriers reduces heat loss in the coldest areas. Closing vents and doors properly at night helps retain warmth, while thermal blankets or row covers provide extra protection for delicate plants.
