I have the back gate that sits betwen my garage and rear of house. there is a large patio that comes off the back of the house but is doesnt cover the gate so all the water just floods in. any ideas to close it? the top of the gate is around my head height at 5ft 4. my only idea is to add a new section of patio that sits elevated above the house roof line and garage. for a 1.5 meter x 1.5 meter section they quoted $1500. is there anything else i can do?