Setting Sun
When the sun sets, if you are on a west facing patio, the sun will shine directly
on you causing glare. Even if you have a patio roof, the sun can still get to
your eyes. Offset patio umbrellas solve this problem by a tilt mechanism that
can completely block out the sun.
Portability
You can not take your patio roof to the beach very well (or not at all). When
you go to the beach or park you can take your patio umbrella with you. Make
sure you have a water or sand base so that it is easier to carry.
Sun Versatility
While getting shade is important, when it is very hot, sometimes (like in spring and fall) the weather is a little cool. It is nice to be able to have the choice to get sun or shade. If you like to lay out on your patio to catch some rays, you will be glad you have an umbrella instead of a patio roof.
Style
Have you ever seen a beautiful patio roof? Most people don't notice patio roofs as being beautiful. However, many people consider patio umbrellas to be a work of art. You can purchase varieties with famous paintings, numerous woods, and shades of fabric. There are even people who create umbrella art. People are attracted to beautiful umbrellas. When landscaping your home, it is important to note that square and rectangular shapes are to be avoided. The round nature of the patio umbrella fits in harmoniously with natural surroundings.