Greenhouse glazing is the material that covers the greenhouse frame, and will determine the functionality of your greenhouse. Although glass-glazed greenhouses were used universally until about forty years ago, glazing methods have improved so much in recent years, that plastics and films are now considered to be a more cost effective choice than glass greenhouses.

The most widely used materials are rigid panels (polycarbonate and acrylic) and poly film or film sheeting (Polyethylene), and fiberglass. Each kind of material works well and has its own strengths and weaknesses.

Polyethylene film absorbs some of the heat, and transmits the rest through the greenhouse. It