Thread: vapor barrier?
10-04-2013, 07:46 AM #1New Member
- Join Date
- Oct 2012
Hello all. Yesterday I ran into something I've never seen before. I demoed a small bath (tile walls and floor) to prep for new tile floor and bead board for the walls. Everything went as usual breaking up old mortar beds until I got to the exterior wall which is under a window. The wall is completely filled with concrete. I drilled a few different spots and it's as deep as the stud bay. Exterior walls on either side of the bath are hollow which has me scratching my head as to why someone did this. I'm apprehensive to bust it out for fear of damaging the stucco siding, so I'm going to just going attach the bead board to the mud bed. Even though the mud bed seemed pretty dry and there isn't a shower, I was going to cover with roofing felt just to be on the safe side. Overkill? Northeast location. Thanks
10-07-2013, 08:14 PM #2Veteran Contributor
- Join Date
- Jul 2008
- Suburbia (Washington, DC area)
Re: vapor barrier?
what an odd one.
Your plan sounds reasonable to me.
I would consider two additional thoughts:
1. Written communication with client that this is extraordinary, unusual, and could be concealing any number of problems with moisture or water penetration which you would otherwise be able to see and repair. Could be causing problems due to lack of thermal control too--inside face of that mud should be pretty cold in winter, would be a condensing surface.
2. Could you add some insulation for comfort purposes? I know you already said it's a small bath and you usually don't have any inches to spare...but even half an inch of foam board would make the winter temperature inside the wall a lot better, and two inches would be huge.
My 2 centsDoug
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