insulating underbelly

[Cat320]

From what I have seen, I don't think you can seal this thing up too tightly, it's not that well made. There are plenty of gaps and cracks especially around the hoses, electrical lines, etc.

Bert and Betty
Fort Smith, AR
2007 Silverado Classic 3500, DRW, D/A, CC
2007 Montana 3400RL

[tmarshall]

Hey everyone,

I've been away at Custer state park and the black hills this weekend so I've been away form the Monty and my computer. I agree that it is nearly impossible to completely seal the belly up. I saw many gaps and holes near the slideout mechanisms, wire areas, spare tire frame, and rear stabilizer jacks. I also agree with Steve that you need some ventilation to allow air from the furnace into the underbelly. Hopefully this weekend I can quit going on mini-vacations and finish my insulating project. I got a lot of great ideas from all of you and it is now up to me to bring all these ideas together to get great results.

Dennis, I love the idea about the foam board in the basement cieling area. I am going to do that next weekend as well. I am also going to put reflectix (astro foil) on the insides of the basement doors for extra thickness and insulation.


Tim Marshall
2004 3670RL Montana
2002 F-350 powerstroke diesel