I would like to cover my front porch, a small area of 11 ftx 4 feet. This would consist of a roof held by a ledger, attached to the house, and 2 columns. I plan to place a rail on top to make it look like a balcony. Can I anchor the ledge to the bricks on the front of the house? The bricks would carry part of the weight. What kind of achors can I use? Also what roofing material can I use on an almost flat roof?