This is because your original insulation r value most likely has dropped from recommended 60 to 20 30.
Adding a layer of insulation to your attic.
Whether you live in a warm weather state as i do or in a cooler northern climate it s hard to stay comfortable and keep your energy bills in check if you don t have adequate insulation in the attic.
For example if your attic already has fiberglass insulation blankets installed you can improve its r value by installing blown in cellulose insulation on top of the blankets.
But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates.
Blown in insulation overview.
By adding insulation to the attic with existing insulation pros and cons read more.
The r values of both insulations will accumulate.
Any new batt or roll insulation installed over existing insulation in the attic needs to be without a vapor retarder face.
Plan to pull up the flooring and layer new insulation on top of the old.
Now that you ve air sealed your attic and basement check your attic insulation levels and add more if necessary.
So this thickness does not stop or prevent your home from heat loss.
If you need to add insulation in your attic save big by blowing in cellulose insulation yourself.
The attic is the easiest place to add insulation to improve your comfort and the energy efficiency of your home.
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.
Faced insulation should not be placed on top of existing insulation in the attic.
Add additional layers.
Stop using your attic for storage.
This feature is not available right now.
Because the simplest and cheapest way to insulate an attic is to add material to the floor.
Many older homes have less insulation than homes built today but even adding insulation to a newer home can pay for itself within a few years.
The vapor retarder on top of or between layers of insulation can trap moisture.
In case you have had your attic insulation installed more than 15 to 20 years ago it is advisable to get it replaced.
To install fiberglass batts over existing insulation lay the batts perpendicular to the joists so they do not compress the insulation below.
The pros charge 1 500 to 2 000 to do a 1 200 sq ft.
How much does attic insulation cost.
You can achieve better thermal performance in your attic by adding an additional layer of insulation.