If your house has lots of air.
Cheap wall insulation ideas.
Spray foam insulation seals leaks and gaps inside existing walls.
R value refers to thermal resistance.
Cellulose insulation is a recycled loose fill insulation that can be blown into walls and attics making it the ideal choice for garages that have been finished.
Department of energy recommends unfinished attics.
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Polyiso boards are pricier than other types of insulation because they offer an r value between 6 and 7 per inch a big advantage over fiberglass cellulose and other rigid board products.
Cheap ways to insulate a building consider the r value.
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