A more spacious greenhouse for the serious gardener! The Professional Greenhouse is the perfect weather- resistant combination- smooth, strong, totally maintenance free resin framework with tough safety glazing. Provides UV protection, proper air circulation, heat control and simple push-fit assembly. Modular DIY structure: 64 to 128 square feet. Comes complete with double hinged doors and two roof vents. 8 feet wide with double doors. We recommend that you secure this greenhouse to the ground. You will have the opportunity to purchase the matching Base Kit during the checkout phase of this purchase. The Professional Greenhouse has been designed to be as easy to put together as it is beautiful to look at. Most of the work can be done by a single person. Only attaching the roof requires the help of a family member or neighbor for a short while. Before assembling your new greenhouse, a proper foundation must be prepared. Make sure that you have checked with your local authorities regarding any required building permits. We recommend that you place your greenhouse in a spot where it will receive direct sunlight and will be protected from the wind as much as possible. The door should not face prevailing winds.