Glass greenhouses offer high light transmission and premium aesthetic appearance but require stronger foundations and higher initial investment. Polycarbonate sheets provide impact resistance and good insulation with a 10-year warranty, making them popular for mid-range applications. Film greenhouses have lowest initial cost but require periodic replacement every 2-4 years. Each type suits different applications: glass for year-round production of high-value crops, polycarbonate for seasonal growing in challenging climates, film for temporary structures or budget-conscious operations. Construction key points include proper site preparation, accurate framing, adequate ventilation design, and weather-tight sealing.