This is usually kraft paper but sometimes other types of paper can be used.
Attic kraft paper.
The vapor retarder kraft paper is facing toward the conditioned side.
It s important to use the right type of insulation to prevent moisture problems in your attic.
According to owens corning and certainteed makers of insulation kraft paper is a retarder not a barrier.
Any potential changes can be secured by asking your local insulation dealer.
The facing on kraft faced insulation is made of kraft paper with an asphalt coating that makes the paper impermeable to water vapor.
The facing contains a thin layer of asphalt which acts as a vapor barrier to block moisture.
Do the air sealing.
Kraft paper the asphalt impregnated brown paper facing available on insulation is rarely called for these days.
They also state that the vapor retarder is a one way ticket to allow moisture out of the structure but not back in.
Kraft faced insulation should be installed in exterior walls exterior basement walls and attic ceilings by pressing the product into the wall cavity with the paper side facing outward towards the installer.
Sounds like a good idea but the vast majority of moisture problems are caused by air leakage not diffusion even in places like maine.
As the kraft paper tabs on the existing insulation are stapled i inevitably ended up with a lot of tears around light junction boxes top plates etc.
Insulating attic floors unfinished or uninsulated attics need a layer of protection.
Batts in the rafters simply jamming batts between the rafters of a cathedral ceiling or insulated attic will interfere with the roof s ability to breathe.
The paper creates a vapor barrier that helps keep the water vapor in the warm moist heated indoor air from migrating outward into the wall or other structure.
Whether it is made from paper or plastic it always faces whichever space is typically warmest in winter.
The purpose and way to apply is basically the same.
Stop worrying so much about vapor retarders.
When insulation was first developed it was only an inch or two thick and the attached kraft facing was stapled to studs to keep it from sagging.
It has to do with the way it is processed.
The house was built in 1967 so i had to pull up the existing insulation in order to air seal.
Paper faced insulation means that one side of the insulation material comes lined with paper.
Some builders rely on batts with attached kraft paper facing to do that job but tom recommends unfaced batts covered in plastic with all the seams taped shut.
