Vapor barrier

[dukhntr]

So I am nearing completion of the insulation of my 16' fish house. I have searched but still can't find a definitive answer---is it recomended to use a vapor barrier? I have siding, tyvek and insulation installed. Need to know before I start installing the t&g pine.

Thanks fo any help

dukhntr

[two cups]

I bought a fish house shell at Performance Engineering and when I asked Tom the owner about a vapor barrier he told me not to do it. Rick

[Heft]

Without it you are driving all that warm moisture air into the wall cavity. That then turns the wall insulation into frost and once it warms up and melts then you have a mold issue. Unless you have spray foam insulation, I would add a vapor barrier on the heated side of the wall over the insulation, overlap and tape the seams, and also install it on the ceiling. My two cents.

[trapperdirk]

I spray foamed our floor am going to vapour barrier on the warm side walls and ceiling that have rigid foam . Vapor barrier is something any home builder would use and there is a reason for it .. Its also cheap insurance against mildew and sweating as was mentioned . For few bucks do it up right .

TD

[dewey1980]

always pillow your insulation, 4 ply ,keeps u healthy ,no mold

[katophil]

I did and I would do it again. Just remember to have a vented heater.

[Eelpout08]

sometimes with the tyvekk on the outside and the vapor barrier on the inside moisture can get trapped inside the wall, thats why they have air to air exchangers in all these new tight construction homes, to keep the humidity down. im not saying i wouldnt use it, just something to keep in mind. if nothing else it would keep any water and whatnot from getting at the studs next to the floor.

[muchowja]

If you use ridgid foam insulation for your insulation that is a vapor retarder/barrier and you don't need another. Also 3/4 ply wood is considered a vapor retarder/barrier so if you used that on the floor you don't need another one there either. You should caulk or use can foam on the seams where your foam meets your studs though.