Our first suggested assembly for interior basement insulation would be a vapor barrier membrane directly against the concrete block foundation with a channel at the bottom for drainage either a surface drain in the concrete or we would remove the concrete from the floor along the perimeter and install a french drain. On a concrete block wall system you will find that the course of a block has a horizontal truss type or ladder type joints reinforcing it. These blocks typically measuring eight inches high can also hold an air barrier.
Concrete block wall systems are also quite common on job sites. Not to be confused with a vapor barrier which is placed on the warm side of the wall just in front of the insulation and behind the drywall a moisture barrier goes against the basement wall. Concrete block with interior frame wall cavity insulation and brick or stone veneer applicability limited to mixed humid hot humid mixed dry hot dry and marine regions should not be used in cold very cold and subarctic.
This wall assembly will dry from the vapor barrier inwards and will dry from the vapor barrier outwards. Cut a sheet of 6 mil polyethylene plastic or a similar vapor barrier to fit. Do the same with the width.
Find the wall height with the tape measure and increase it by about a foot in length. If no vapor barrier were used the water va por would condense on the insu vapor barriers in masonry construction vapor barriers provide inexpensive insurance against moisture problems in wall cavities by william a. The vapor barrier therefore is in stalled on the back of the interior wall surface which has been cal culated to be 68 f.
Depending on your location 6 mil vapor barrier can also be used as part of a. Eliminating the movement of moisture into a building reduces the likelihood of mold and other problems caused by the buildup of water. Attaching vapor barrier to a concrete wall can help to prevent the movement of moisture through the concrete and into the building.
A vapor barrier against the concrete surface is generally recommended before wood framing or flooring materials are installed. Below grade walls and floor slabs transmit ground moisture through concrete walls or slabs. Very hot and humid climates may benefit from an exterior vapor barrier that keeps outside humidity from penetrating into walls.
Vapor barrier for concrete block walls. How to glue a vapor barrier to a cement block wall. By nature vapor travels from areas of higher concentrations to lower.
By nature vapor travels from areas of higher concentrations to lower. How to glue a vapor barrier to a cement block wall.