"u4ick" wrote in message
...
Builder has given us choice of either fiberglass or cellulose insulation
for walls in new house construction. Which is better? He told us the
cellulose has a slightly higher R factor and makes the walls air tight.
Does the cellulose settle more than the fiberglass? Is cellulose more
prone to having mold or insect problems?

All true, cellulose is treated to resist insects and mold as well as fire.
Cellulose is much less expensive 70sqft R12 3.2" is $11 vs $25 for 88sqft
fiberglass R12

http://www.cocooninsulation.com/Default.asp