Ensure ends of insulation are butted together and flush to underside of framing.
Is kraft paper needed for attic insulation.
To the inside of the home or the outside of the home.
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.
It has to do with the way it is processed.
For many building science questions the answer is it depends for this one the answer is clear.
Measure the area needing insulation.
What is the right insulation for an attic.
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.
Ensure insulation extends to the outside edge of the exterior top plates and to the peak of the cathedral ceiling.
Measure the depth of your current insulation.
According to owens corning and certainteed makers of insulation kraft paper is a retarder not a barrier.
Calculate additional insulation needed.
If you install fiberglass batt insulation with a kraft paper vapor retarder in a home which way do you face the vapor retarder.
If your current insulation is only 5 inches deep you ll need to add seven inches of insulation to achieve the 12 inch r 38 rating.
The purpose and way to apply is basically the same.
This is usually kraft paper but sometimes other types of paper can be used.
Friction fit insulation between and parallel to the attic framing members.
Creating a moisture barrier.
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.
But for a thorough job especially in bathrooms and other high moisture areas a continuous 6 mil plastic sheeting vapor barrier is much more effective.
Vapor barriers sheets of plastic or kraft paper keep water vapor out of the wall cavity so the insulation stays dry.
Kraft paper does act as a vapor retarder to slow the movement of interior moisture through the wall cavity and insulation.
Illustration by ian worpole.
R 38 is the industry standard and the minimum thickness for r 38 is 12 inches.
As a result of evaporation people breathing and plant respiration air carries some.
They also state that the vapor retarder is a one way ticket to allow moisture out of the structure but not back in.
Fasten kraft face tabs of insulation to the.
Paper faced insulation means that one side of the insulation material comes lined with paper.
When using kraft faced batts.
But if it does the barrier should face inside in northern heating climates and outside in humid southern climates.
