Plastic Sheeting Over Faced Insulation

Continue in the same manner until the bottom row is complete.

Plastic sheeting over faced insulation.

If you want to use kraft faced insulation make sure to overlap the tabs at each framing member and seal any seams. To each is own some believe the plastic works better. Vapor barriers sheets of plastic or kraft paper keep water vapor out of the wall cavity so the insulation stays dry. Move down the wall and staple the sheeting to the studs over the insulation until reaching the end of the wall.

Cut the sheeting with scissors at the end of the wall. Install the plastic sheeting only after the insulation wiring and plumbing have been completed. This is what building scientists proposed as the solution for walls that wouldn t hold paint back in the early days of insulation. Stretch the plastic sheet tightly across the top of the wall and staple it to the studs and plates.

In any case the vapor barrier must point to the warm side. Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets. Many professional installers prefer to use unfaced batt insulation in the walls then a clear plastic vapor barrier over the inside face as it is easier to seal. Center the material so the excess is approximately equal on either end as.

More use the plastic these days without paper faced insulation. The sheet of poly still cuts off drying to the indoors but it keeps the water vapor in the humid indoor air away from the cold surfaces inside the wall. Measure the length of the wall. This barrier is meant to keep moisture from getting to the insulation in the walls and ceilings and it is required by building codes when insulating most houses.

But if it does the barrier should face inside in northern heating climates and outside in humid southern climates. After residing then insulate with your product of choice. Not every type of insulation needs a vapor barrier. It didn t solve the paint problem though because water vapor from the indoor air wasn t the main source of moisture.

Unroll a length of 4 mil polyethylene commonly called either poly or simply plastic. How to install poly over insulation 1. Go to the second wall and install the sheeting over the insulation just like the previous wall.