1. Clear polycarbonate roof
Keeps the rain off and lets the light through to the house. The most popular way to make a covered outdoor deck usable year-round. Tinted sheets cut some heat and glare.
2. Solid roof outdoor room
A solid roof creates a true outdoor room with full shade. Add a screen on the windy side and outdoor heating, and it becomes a space you use in winter.
3. Pergola
An open timber pergola gives dappled shade and structure. Train a deciduous vine over it for summer shade and winter sun, or add a roof later. See pergolas.
4. Louvre roof
Adjustable louvres open for sun and close for rain. They are a specialist product, usually at the top end on price, but very flexible.