Plastic Sheeting Over Faced Insulation

It didn t solve the paint problem though because water vapor from the indoor air wasn t the main source of moisture.

Plastic sheeting over faced insulation.

Go to the second wall and install the sheeting over the insulation just like the previous wall. Cut the sheeting with scissors at the end of the wall. We completely gutted the room and i have two exterior walls with r13 kraft paper faced insulation. After residing then insulate with your product of choice.

Apply a strip of insulation tape designed for vapor barrier use over any seam where the vapor barrier meets another surface such as the wood framing around a window or the rim of an electrical box. Continue in the same manner until the bottom row is complete. Install the plastic sheeting only after the insulation wiring and plumbing have been completed. It s also important that there be no air pockets in the insulation as this is where the cold spots spring up in rooms.

Without stapling moisture still has a path into the room. But if it does the barrier should face inside in northern heating climates and outside in humid southern climates. If you want to use kraft faced insulation make sure to overlap the tabs at each framing member and seal any seams. Move down the wall and staple the sheeting to the studs over the insulation until reaching the end of the wall.

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. I m thinking it will cut down on any leaking drafts as well. Illustration by ian worpole. Stretch the plastic sheet tightly across the top of the wall and staple it to the studs and plates.

More use the plastic these days without paper faced insulation. I am redoing our master bath. Not every type of insulation needs a vapor barrier. Vapor barriers sheets of plastic or kraft paper keep water vapor out of the wall cavity so the insulation stays dry.

Faced insulation has flanges on the outside of the batt that need to be stapled to the wall studs and joists. Should i add a 6 mil plastic vapor barrier to the walls. Would it trap in moisture or help as an additional vapor barrier. Overlapping paper tabs on faced insulation and stapling is why its on there.

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.