Blew in cellulose insulation but used block plate

I just installed roxul comfort batts in the single exterior wall in my kitchen not knowing that I should have air sealed the wall cavity with Great Stuff. Should I go back and air seal? I read somewhere that Roxul is dense and relatively airy tight compared to fiberglass. I roughed up the edges of the batts a little when I was installing, so I'm worried that pulling it out and reinstalling may decrease the R value.

bricking up a window Hello all, About a year ago I bought a house which is about 90 years old in western PA. One thing that has been bothering me is that the previous owner drywall/plastered over a window from the inside but they left the window on the outside. The window itself is OLD. It's single pane, the frame is cracking and broken and not very good. While I'm not exactly sure whats in there, I took a picture with my iphone from the outside [URL="http://i.imgur.com/foQJX2G.jpg"]HERE[/URL], and see some sort of drywall. I'm thinking about bricking it up (because it really just opens to the side of my neighbors house). I feel like bricking it up won't be too difficult. Do I have to worry about moisture building up when bricking up the window? Do I need some sort of vapor barrier installed? Am I just being paranoid? Can I just leave an air gap? My house is old, so there is no insulation in the walls that I know of, so I'm not too worried about that. I just want to make sure I have all my bases covered before I cover up that hole. Thanks!