wrote in message
oups.com...
I'm in Fort Worth, TX and when I look at an online chart for the 'R'
value of insulation I would need for my attic, it tells me 49. (about
14" of cellulose. I think)

At the local DIY store they tell me that this is really overkill and
that about 30 will do about all I need.

Since we will be doing the 'blowing in' ourselves, I would appreciate
it if someone who has done this themselves, in this area, would care
to give their opinion of what 'R' value I will need.

Need or want? Generally, the more the better, but there is some diminishing
return. In your area, it is probably a better benefit for AC than for
heating. What is the cost difference doing it the two different ways?
$100? Then go for the most. $1000? then I'd go closer to the R30.

As the cost of energy goes up, the return for more insulation gets better.
Your energy cost may be 20% to 50% higher in a couple of years so factor
that into your decision.