Why use Alumawood with footings? There are a few reasons why you would upgrade you patio cover with concrete footing with steel posts. If you have pavers you will need footings to build an Alumawood patio cover. If you are building on dirt is another reason you would need some concrete footings with stubbed out 3″x3″ steel posts. The other big reason to use footings, concrete, steel posts and steel c-beams in the header beams is for increasing your post spacing. To increase you post spacing you use steel to strength the patio cover and low for longer distances between posts.