Now here s a situation where a homeowner what looks like many years ago added insulation they added a three inch layer but it has facing on it and that could create a.
Adding unfaced insulation attic.
The vapor retarder on top of or between layers of insulation can trap moisture.
In a cooling climate a good blanket of attic insulation helps keep the house cooler and reduces the load on air conditioning equipment.
Any new batt or roll insulation installed over existing insulation in the attic needs to be without a vapor retarder face.
Typically houses in warm weather states should have an r 38 insulation in the attic whereas houses in cold climates should have r 49.
When insulating exterior walls you can increase the r value by adding sheathing to the insulation that is already there.
As you ve discovered since you already had insulation in your attic the layer of new insulation you added should have been unfaced to prevent moisture from becoming trapped between the layers.
I ve always said adding insulation to your attic is some of the best money you can spend to make your house more energy efficient but whether to use faced or unfaced insulation is a great question.
Loose fill or batt the common term for blanket insulation.
Once you ve decided which type is best for you examine the material options and prices to home in on the right product.
By adding insulation to your attic you ll not only reduce your monthly utility bills but also enjoy improved energy efficiency and greater comfort throughout the year.
Nailing a layer of sheathing to exterior wall insulation can greatly increase the r value.
Air migrates from warmer spaces toward colder spaces and insulation is designed to help prevent or at least slow that migration.
Both can be added to uninsulated attics or layered over existing material.
Faced insulation should not be placed on top of existing insulation in the attic.
What is the right insulation for an attic.
To increase attic insulation r.
Now that you ve air sealed your attic and basement check your attic insulation levels and add more if necessary.
Unfaced insulation is simply insulation without any vapor retardant such as plastic or paper.
The good news is that the solution to your problem isn t that difficult.
Owens corning r 19 ecotouch pink metal framed unfaced fiberglass insulation metal framing batt 16 in.
These insulation levels will keep heated air from migrating out in winter.
Buy 20 or more 16 09.
View the owens corning attic insulation 22 98 22 98.
10 bags model m47q view the owens corning exterior insulation 661 00.
For diy attic insulation you ve got two choices.
