Hi I have a house that is built on a hammock island surrounded by salt marsh in SE GA. Technically, at the present time houses built in a location like this the living area would have to be about 7-12' above ground. This house is about 16 years old and the previous owner did not "build up'. The ground level is heated and AC'd with finished walls, ceramic tile floor, a bathroom and a dropped tile ceiling throughout. Squirrels got into the space between the dropped tile and the floor above. The joists of the floor above have a paper on one side yellow (fiberglass?) insulation in them. I have removed all the ceiling tiles and the insulation and got rid of it. It smelled and was "dirty". I am going to spray the underneath of the sub floor and the floor joists with disinfectant to kill any bacteria and remaining odor and let it thoroughly dry out. I will then reinstall new ceiling tile. My question is 1. Do I really need to put insulation back? 2. Do I need a vapor barrier since both spaced are heated and cooled? 3. If yes to 1 and 2, ( and I hope not) I do not want to use fiberglass as I am very allergic. What might be a good substitute. I have found cotton batts but they are not a vapor barrier. Thank you so much Jackie, whitestars

I'm in Ottawa, ON, CANADA. It gets cold here in Winter! ;-) Our bungalow has loads of attic space, and I'd like to add more insulation on top of the single layer of paper-backed 6" fiberglas that's currently up there between the joists against the single layer of sheetrock of the celing for the livign space below. There's no plastic vapour barrier. My question is, is this enough of a vapour barrier? Thanks, Chris