It was time to add some insulation to the ceiling of the van, now that with the Murphy bed installation, access to the ceiling is closing up.
Poly-Iso is fairly rigid and not bendable, so I used three 1/2 inch layers to fill the area between the beams and I still needed to add cuts to the insulation, to make a better fit.
A good alternative to the Poly-Iso is Thinsulate, an automotive bat insulation, that is easier to install. It is pricier though and has a lower R-value. At a later stage, I will cover the insulation with a thin plywood.
With the Medium High Roof of my Ford Transit and my 5′-7” height, I have barely an inch left, to walk up straight inside the van. With a High Roof van or when you’re smaller than me, I would advice to add another layer of Poly-Iso along the entire length of the van, covering all the ceiling cross-members and thus avoiding any heat transfer from the metal of the cross-members.
- ½ in. Poly-Iso ➜ http://18.104.22.168/buy/poly-iso
- 3M 90 Spray Glue ➜ http://22.214.171.124/buy/3M90
- HVAC Tape ➜ http://126.96.36.199/shop/hvac-tape
- Optional: Thinsulate ➜ http://188.8.131.52/shop/thinsulate