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.
Adding a layer in photoshoper of insulation in the attic.
Some attic floors that already have a layer of insulation could benefit from an additional application over the existing layer.
The extra batting increases r values so it further slows warm air.
Any new batt or roll insulation installed over existing insulation in the attic needs to be without a vapor retarder face.
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.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your.
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.
Add the right kind of insulation.
Blanket insulation typically comes in rolls that are twenty four inches wide since this is the most common width of open spaces between joists but.
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.
The vapor retarder on top of or between layers of insulation can trap moisture.
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.
Proper attic insulation is the best way to prevent heat loss in the winter and retain cool air in the summer.
By reducing energy.
So it s time to pay close attention to what s happening up there.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
To find out if you have enough attic insulation measure the thickness of the insulation.
So maybe too air tight is an eventual possibility.
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.
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.
The higher the r value the better the thermal performance of the insulation.