[LIforrelaxin]

Bituthane or Ice and Water sheld is a big neccesity. Every roofing contractor I know.... recomentds going up six feet. Now I say roofing contractor, because the are general contractors that will do roofs, and then there are guys that specialize in roofs. I have now had 3 different Roofs done in the last 5 years, in different locations. Each time the work was performed buy a roofing contractor. They all incude 6 feet in there estimates. They will do the whole thing as BT did. However 6 feet is probably more then enough. And then jsut felt above that for the rest of the roof.

Now just a little more information here. The reason the Bituthane is important is that unlike felt which will tare, thus allowing moisture through, the Bituthane, as it heats up, seals around all the nail holes, and really bonds with the shingles. Thus it creates a nice solid barrier after a summer in the sun. It will also seal up any small litte tares that happend durring an ice build up. All in all it is a great roofing product.

now back to Winni-retireds bay window. These are and always have been problematic. Much like sky lights.... as others here have said, try and find a way to get through this winter... I don't have any further suggestion on then what is mentioned here....

Then come spring have all the flashing checked, and maybe re-roof the bay window. I assume the Bay window has its own little roof. Ventilation is not an option, you just have to have a good seal around the window.