I have a 25 foot by 50 foot patio of just solid cement covered with a grey paint of sorts. There is a brick gas BBQ that backs up to the fireplace against the house about 10-14 feet away from the house edge and edge of the patio. The BBQ gas lines need to be replaced too. How can I make this area more cozy? House is shaped around the patio (L) and there are 3 sliders from the house to the patio. Drainage can be a problem too so there can't be a raised bed around the perimeter. Tx Hope