Most attics are insulated with blown in loose cellulose r 3 5 per inch blown in loose fiberglass r 2 5 per inch or fiberglass batts r 3 2 per inch.
Attic addition insulation.
Cellulose is recycled newsprint treated with a fire retardant.
Fiberglass is just that thin fibers of glass that trap air.
Check outlets on all floors as well as old and new parts of your house.
Block all vents in the attic floor with baffles making sure to extend the baffles at least four inches above the planned thickness of your insulation.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.
It can cost anywhere from 1 700 to 2 100 or between 1 50 and 3 50 per foot to insulate an attic depending on what insulation material you choose.
Pull out a small amount of insulation if needed to help determine the type of insulation.
In case the test is positive for asbestos it needs to be removed by a professional you need to air seal before a new installing since the air leaks will hinder the performance of insulation and significantly reduce the energy efficiency in your home.
Vermiculite insulation that is found in the attic needs to be tested.
Add the right kind of insulation.
The higher the r value the better the thermal performance of the insulation.
Adding insulation to an unfinished attic is one of the most effective ways to save money on your energy bills.
Before you call a contractor however it s important to understand the options and costs involved.