The recommended insulation for most attics is about R-38 or 10 to 14 inches deep, depending on the type of insulation you choose. BTW, is your hatch insulated, too? Use 4-inch-thick foam board glued to the top.
Don't have an account? Create your account, it takes less than a minute.
Lost your password?
It takes less than a minute. If you already have an account login.
Enter your email address and we'll send you a link you can use to pick a new password.