I have a unique ceiling. It's a cathedral made from 2 x 6 planks. This is supported by five large beams that span the entire great room. On the outside, on top of the 2 x 6 planks appears to be some sort of "sound board" about an inch thick. They placed tar paper and shingles directly over that. The best I can explain the "sound board" is something like MDF. To say the least, the roof needs to be replaced because of inferior contractor quality. Any ideas on how to properly place a new room on the great room? In the included pictures you can see the ceiling goes to the outside as well.
Ceiling.jpg Dining.jpg House.jpg
And since we are discussing roofs, this roof projects further forward at the highest point and then gets closer to the house as the roof slopes down. This feature allows everyone to get drenched when walking on the stoop in the rain. Any ideas?