Aluminium greenhouses are sturdy, safe, and will definitely last longer than the ones made of wood. They are also cost more, and in some cases, way more than if you choose to erect a wooden greenhouse. However, every buck you spent in an aluminium greenhouse is definitely worth it in the long run. The point is will your greenhouse last long enough to make it worth your bucks?
There are a number of things you can do to make sure that your greenhouse stays in good shape over the course of time. One of these things is checking the members of its joints. Aluminium greenhouses are erected with nuts and bolts. After some time, these nuts and bolts tend to get loose, particularly those in the joints, and if they are left unchecked, your greenhouse might one day come crashing down. It is such an imperative that you assess the joints in regular basis, say once a week, and keep them tightly joined. See also if there are any physical damages to each and every member, like a chipped nut, and maybe a stripped screw. Replace any damaged component immediately with one that perfectly fits.
Another way is choosing an aluminium frame made green by the green Polyurethane powder. Aside from the fact that such frame looks more in sync with a “green” setting, they are also sturdier. It will also help if you paint the greenhouse, since the paint will act as a protective layer against discolouring and other possible changes due to the climate.