ACRYLIC vs. Gel-Coat Fiberglass. Acrylic. One piece construction with dome. This adds strength to the unit and eliminates post installation. damage, no seams to caulk and gather mold and mildew, dome eliminates ceiling maintenance. Non porous surface, Easy to clean, no pores to catch soap, dirt, body oils.
In cold frame gardening, a cold frame is a simple structure that usually works like a mini-greenhouse. It has a wooden frame with a transparent roof made from glass and is always constructed low to the ground to provide proper insulation.
At a recent show sporting ranges of polycarbonate greenhouses, the sales team offered passersby a hammer and promised a free greenhouse if they could break a polycarbonate sheet. Despite Herculean attempts, no one managed it. My cold frames were more prone to breakages, due to their lower height and gentler incline.