If there is an open area around the garage you can opt for a wooden garage roof as well.
Roof made of wood.
Garage roofs can be arched sloping or flat depending on your taste and aptitude.
These are cost efficient and durable made with a base mat of wood fiber cellulose paper or some other material saturated with asphalt so it is waterproof.
For pitched roofs the truss the framework can be made of wood or metal and the outside can have wood or asphalt shingles clay or concrete tiles or metal sheeting.
The type of truss you build will be suited for different weights which may help you determine the exterior materials you use.
Steel and reinforced concrete have for the most part replaced such heavy wooden support systems and such materials moreover have enabled the development of new and dramatic roof forms.
If you choose a sloping roof for the garage paint the walls white and the roof in a darker shade like chocolate brown blue or green.
Being made of synthetic rubber or polymer they are flexible and elastic and can handle temperature changes and some impact types better than built up roofs.
Until the later 19th century such supporting frameworks were made of wooden beams sometimes in highly complicated systems.
A top coating of adhesive asphalt will be applied and ceramic granules embedded into the shingles.
However archaeologists have found evidence of very early use of roofs made from a wide variety of substances including animal parts wood rocks and clay.