Add insulation to attic.
R factor for live in attic.
Therefore at least 11 inches of fiberglass or 9 inches of.
Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.
In most climate zones of the country an attic r value of at least 35 is considered the minimum to meet today s energy conservation goals.
Houses in a cold climate should have a minimum of r 49 in the attic which is equivalent to approximately 16 of fiberglass insulation.
They are available in widths suited to standard spacings of wall studs and attic or floor joists.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
2x6 walls can have r 19 or r 21 products.
The amount of insulation recommended for your home is dependent on where you live but here are some general guidelines.
Existing 3 4 inches of insulation.
Recommended insulation levels for retrofitting existing wood framed buildings.
Loose fill insulation usually made of fiberglass rock wool or cellulose comes in shreds granules or nodules.
2x4 walls can hold r 13 or r 15 batts.