do I have to blow insulation in the roof of my mobile home if I install foam insulation under a meatle roof?
I don't think you can blow insulation in that area. It is to small of an area to get insulation into.
Install it under the meatle roof, it is a lot easier to do and will save you more money overall when you are spending money. Thanks
Some mobiles have a vented attic and some don't. If your attic is vented, the foam on the roof won't help insulate inside the house. I've blown insulation into a mobile home attic before (vented attic), but some mobiles one can't (not vented attic). There are different variations of attic venting, dictating if you can blow in or not. I would add insulation anyway, if you can, mobiles usually skimp on attic insulation, even if they are "certified".
Vapor barriers always go on the heated side of walls or ceilings. If you are going to add insulation to your attic and don't want to put in more blown in insulation ( which does have a better R-factor) then purchase unfaced fiberglass insulation to put on top of existing insulation. The thing you need to avoid is called double vapor barriers. Years ago when the first started playing with super insulated houses they would put a poly on the inside and outside of the walls. What happened is any moisture picked up in the walls going from summer to winter would get trapped in the walls and rot them out. No matter what only one vapor barrier on the heated side of the insulation!!! Then your house can breath and release moisture regardless how thick your walls or ceiling.
