Rode with a friend to Red Bay Alabama to have his 2009 Tiffin Alegro RED worked on. He was having some repairs made to the door latch. Did a self guided tour of the plant and noticed Tiffin insulates the firewall with a double-sided foil insulation that is only about 3/16 in thick. They also sell it at there on-site parts store. Claims are that it was used in the space shuttle and it has an R21 rating. Picked up 24 sq ft for $7.05. Plan to insulate the firewall, dash and step well. Will use spray adhesive that is resistant to heat and mositure. Will update this post with pics once I've completed the install.
2013 Berkshire 390RB-60
toad - 2002 Jeep Wrangler Sport