Hello. We are currently remodeling our top floor which is an open loft-style attic room into a room for our 3-year-old. There is tremendous heat loss so we'd like to insulate between the pitched wood panels but are concerned about fiberglass, especially as he already has asthma. Reviewing our options, we want to find the safest and most cost-effective plan. So far we have heard of the following:

Recycled Denim: Eco but pricey and receives mixed reviews for effectiveness and ability to stay put

Air Krete Foam: I have read great things about the Air Krete Foam but I don’t know the price and it sounds like it would look awful and need to be covered with something? http://www.treehugger.com/green-arc...ement.html

Eco Touch Fiberglass: I don’t like the idea of even an "eco" fiberglass being exposed and would want to cover it with something - but I imagine drywalling over everything would add to the cost significantly: http://reviews.homedepot.com/1999/2...eviews.htm

The room is about 500 square feet. Thank you so much for your help!