Green House & Sunroofs, are usually built as extensions outward of your home, or place of business. Mostly aesthetic, they provide more space to live or work in. This space is usually lighter, for the conservatory will have windows around every panel.
Modern Green House & Sunroofs are either custom designed, for the needs of the location, or modular types with ease of installation. The former being constructed from a wide range of materials, ranging from solid wood, to metal to PVC frames. The latter being mostly of PVC plastic, for ease of manufacture. These PVC Green House & Sunroofs are simple to construct.
The combination of European style roof with the windows create a type of 'greenhouse with seating', for the members of the house to enjoy a airy and calm reading space, for example.
The most common Lean-to greenhouse, sometimes called traditional conservatories, are simple square greenhouse, with a sloped roof.