The higher the r value the better the thermal performance of the insulation.
Adding a layer in photoshoper of insulation in the attic.
By reducing energy.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
Believe it or not there are situations in a home when you should remove the old attic insulation before adding more over the existing and in this short video.
Proper attic insulation is the best way to prevent heat loss in the winter and retain cool air in the summer.
Some attic floors that already have a layer of insulation could benefit from an additional application over the existing layer.
We do plan to deal with the walls later by taking down the wood boards adding insulation and a layer of plastic then putting the boards back up.
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.
The extra batting increases r values so it further slows warm air.
Faced insulation should not be placed on top of existing insulation in the attic.
So maybe too air tight is an eventual possibility.
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.
Any new batt or roll insulation installed over existing insulation in the attic needs to be without a vapor retarder face.
Add the right kind of insulation.
So it s time to pay close attention to what s happening up there.
An attic that has never been insulated requires at least 6 inches of top quality insulating material and an attic with a thin layer of insulation can be insulated with 4 inch blanket insulation.
If it is less than r 30 11 inches of fiber glass or rock wool or 8 inches of cellulose you could probably benefit by adding more.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your.
There is insulation in some of the walls but not all.
To find out if you have enough attic insulation measure the thickness of the insulation.
The vapor retarder on top of or between layers of insulation can trap moisture.