Patrick writes from Wenonah, New Jersey: "I live in southern New Jersey and I am remodeling a kitchen in a house with cinder block walls. The original kitchen walls were uninsulated and were not properly framed. I am framing out the walls with 2x4's and plan to add insulation. Some people I have spoken with suggest placing a 6 mil plastic vapor barrier directly on the cinder block behind the 2x4's and then insulating the spaces between the studs with kraft faced bats (kraft facing towards interior). Will this approach trap moisture between the kraft facing and the plastic and create a "double vapor barrier" issue? Would is be a better idea to ditch the plastic barrier and simply apply the kraft faced bats as recommended (kraft facing towards the interior)?"

Answer: Thanks for doing your homework and reading my blog. I am pleased to know I am not doing all of this keyboard work for nothing. You are correct. You only need and want one vapor retarder and it should go toward the warm-in-winter side, which you will have with the Kraft facing on the inside toward the interior.