There is no plastic, vinyl or PVCu in our conservatories. Just solid sepele mahogany, or thermally-broken aluminum.
Each material has beauty and merit. One will usually fit the application better than the other. There is only a slight cost increment between them. No matter the material, the conservatory can be built to your design and specification.
The reason we don’t use anything but wood or aluminum is that PVCu is environmentally unfriendly, involving six of the 15 most hazardous chemicals identified for priority elimination by international agreement! Dioxins, lead, mercury and cadmium are amongst the pollutants released during manufacture and disposal.