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First check with your county code office to find minimum requirements established in your area. They will tell you the MINIMUM requirements, in most cases you can install more. A reputable contractor will tell you how much more you can add before wasting money on too much. And yes you can waste money on too much. Then you want to install the best you can afford. Remember with proper insulation and installation you should save money on utility bills.

Search the internet for different types. At my last check the two best to slow air penetration were cellulose and foam. These are more expensive than some others but consider your payback in the long run.

And don't forget proper roof ventilation. At is equally important to vent hot air from the attic space in the warm months.

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15y ago

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