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.
Weight of Building Materials. The weight of materials for a DIY small project, hobby greenhouse is probably not going to be a deciding factor, but comparatively, wood and rebar are relatively heavy and PVC pipe is extremely light. Strength of Building Materials. 1  Lumber frame construction is the norm for most construction projects that are 3 stories tall or less and can be designed to meet most building requirements. 2  A greenhouse frame constructed from rebar could also be very strong if the framework were welded and used lots of cross bracing.