I have noticed that every time the boiler pumps water through the heating pipes, there is a dripping sound inside a ceiling area of one of the rooms in the house, I had been hearing the sound of a drop hitting wood for a long time but it happened or seemed to happen randomly and i couldn't tell if it was really a drop and couldn't also connect it it the pipes..but now when i it happens it is constant, it doesn't not sound like a stream of water just constant dripping, I check the top area of the closet where the sound sees to come from and there are no wet spots in the area at all....i can hear the dripping as im typing this and i just realized that when the boiler is not pumping water the dripping slows down to one drop by every 5 or 6 seconds.. what might i be facing here? please advise.

As I've been noting up and down these forums, I've got to quickly turn this fixer-upper that I've been working on for years into something to sell. This means that I'm having to finish-up some projects that I have underway, hire contractors to do others and in this case, I have an experienced guy doing the bulk of the work and I possibly might come around behind him to do the finishing touches. The experienced guy is laminating my ceilings with sheetrock. He seemed kind of surprised that I wanted him to run tape around the edges, so there'd be an unbroken connection to the walls. Theoretically, I could go behind him and put molding over this tape, but my initial plan was to shoot the ceilings with one pattern using my hopper gun and the walls with another. My hopper gun is still in the box. I've never gotten around to using it and it sounds like my sheetrock guy has always used some kind of patterned stick that he turns to keep from repeating the same pattern. He may actually have a hopper of his own, but he seems to really like the patterned stick method and might not know a lot about the Marshalltown SprayMate. Nevertheless, I'm willing to hop my own to save money or let him use my hopper to save time, if my impression that it's more efficient than a patterned stick holds true. Anyway... after that long preamble... There are place on my walls, where the previous owners obviously patched something by spreading a little joint compound over the plaster and we started by scraping some of the kinda ugly spots and a few new ones, then "buttering" with a smooth coat of joint compound. 1) Is this necessary or will the bare spots get sufficiently covered by the hopper? Also, should I actually clean the walls before he "butters", if that's the way to go? 2) I probably could find this answer, but since I'm here and if you don't mind... Do you apply primer (Kilz?) before hitting it with the hopper, after, or both? 3) Right now, my walls have a "knockdown" pattern and my plan has been to just go back over all of the repaired walls with another coating of "knockdown"; Part of me kind of likes "orange peel", but I don't want to have to sand every wall, so does anyone think an "orange peel" could go over "knockdown" and still look good? Am I wrong to think that a "knockdown" can go over "knockdown"? 4) And finally, the guy putting up my drywall seemed surprised that I didn't have a problem with shooting all the walls and his attitude made me think that it might be more work than I had anticipated. Again, I don't know his experience with hoppers, but am I wrong in thinking that it'd be relatively easy and pretty cost-effective to just go over everything, balance the patterns and hide all the flaws? Thanks in Advance PS) If anyone has any good pointers toward info that'll cover this and other questions, please point the way.