Attic Addition Insulation
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
Attic addition insulation. Before you call a contractor however it s important to understand the options and costs involved. Cellulose is recycled newsprint treated with a fire retardant. Check outlets on all floors as well as old and new parts of your house. When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.
Add the right kind of insulation. Just because you find insulation in one wall doesn t mean that it s everywhere in the house. The higher the r value the better the thermal performance of the insulation. Pull out a small amount of insulation if needed to help determine the type of insulation.
Vermiculite insulation that is found in the attic needs to be tested. Fiberglass is just that thin fibers of glass that trap air. 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. 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.
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.