This poly house is sturdy, long-lasting, and completely waterproof. The perfect cover sheet for greenhouses is our glasshouse sheet, which has a commercial grade thickness. Our glasshouse cover is extremely durable and will last for years in all sorts of weather because it is constructed of superior polythene. You can cover your garden with veggies, flowers, fruits, herbs, and more with this poly house. You can also use it as a little glasshouse in your yard. High light transmission, high humidity, and a comfortable temperature provide for ideal growth conditions.