I have been living in my home for 2 years and am now removing the top of my deck because over half of the wood has rotted. In removing the pieces next to the house, I discoved that the 2x12 that is attached to the house was attached right on top of the cedar shake siding. Although the board and the screws holding the deck to the house seem sound, the shakes just above it are very wet and are rotting and in a couple of places, the plastic wrap is exposed. I had hoped I could just replace the top with Trex. The top of the deck is only about 18 to 24 inches above the ground. (I have a ranch.) Is there any way I could salvage the deck support framing without ripping it out and replacing the whole thing? And how do I replace the rotted shakes? I have attached some pictures. The white spot above the 2x12 is the house wrap showing beneath the shakes that have rotted and fallen away.