I'm using ProtectoWrap around my newly installed windows. It has been on less than a month, but is coming off in some areas. What would you recommend to re-stick the "peel-and-stick". Thanks in advance.

I have a roof over a basement stairwell. The shingles need to be replaced so I am planning to go out there and replace them. But this is an opportunity to possibly improve the roof. So is there anything I should do besides replacing the shingles? I've only repaired one roof in my life - a garage roof. With a house there may be more details you have to get right. For the garage, it was just ripping off the shingles, replacing rotten wood and slapping new tar paper and shingles on, and adding a bit of flashing where needed. Not complicated. No vents, no gutters, no other things to install. However to repair this house roof, there might be things I'm not aware of that I'm supposed to install. For example do I need a moisture barrier? It's basically a flat roof with a slight slope. There is flashing underneath the shingles near the edge; I won't know if the flashing covers the entire roof until I rip the shingles off. I assume the flashing doesn't cover the entire roof and the roof is plywood. I think water and snow is seeping in somewhere, I can't determine where exactly, due to poor condition of the shingles and lack of caulk/flashing/foam at joints, and there may be damaged plywood and flashing. Can I insulate the top of the roof? I mean underneath the shingles, on top of the roof. I don't mean insulating the interior of the roof. Some research tells me it's possible if I attach shims so air can circulate and moisture can escape. But if I do that, apparently I'd have to add vents. Where would I put these vents? Wouldn't vents defeat the purpose of keeping warm air in and cold air out? As for insulating the interior, more research tells me you're not supposed to attach the insulation directly to the wooden ceiling - again, you're supposed to leave air space and vent it somehow. This goes against everything I thought I knew about installing insulation - that you glue the insulation panels to the wall and then attach drywall over it to the studs - no air space. You even caulk the edges so nothing gets in or out. Is it different for ceilings, or are you not supposed to glue insulation to an exterior wall either?