Thanks to all the people who took time to answer . The older people I been around used roofing felt paper to put under
The cement board now i realize they used it for vapor barrier
. Is that still done today ?15 or 30 lb roofing paper behind cement board should
be 0 water vapor getting past it. George
The cement board now i realize they used it for vapor barrier
. Is that still done today ?15 or 30 lb roofing paper behind cement board should
be 0 water vapor getting past it. George