Insulation expense
 

What is the least expensive insulation? We are insulating an attic to turn it into one big bedroom and are trying to save money by DIY. I keep seeing things about recycled insulation and foam board but can't find anywhere a non-contractor can BUY these things...

You've never been to a Home Depot or Lowe's?:)

I think I should have been more clear. I meant OTHER THAN Home Depot or Lowe's. They don't carry recycled stuff (AFAIK)

They carry most everything that isn't recycled so there is all the "new" prices in one stop.

As for the recycled, this isn't a really popular trend yet, so you will likely only have a few places to call upon in your relative area for a quote. Open up those yellow pages and look for salvaged item dealers, recycling centers, demolition contractors, etc. and give them a call.

Lowes and Home Depot carry blown recycled insulation here. If you are going to make a room out of it, you have limited options.