Pink Insulation or ?

[davidz71]

I'm underneath the trailer near the rear bed area and have scraped the frame in preparation for treating then painting with POR15. The pink insulation was toast on one side and bad on the other. I tore it out in preparation for painting the frame and frame to wood contact. Should I go to Lowe's or some other home improvement place and replace it with the same insulation, go with the same in thicker insulation or the foil bubble stuff I have seen mentioned on the forum?

[thecatsandi]

I would replace with an insulation that does not absorb and hold water. A closed cell foam or the foil buble stuff. The water will cause future corrosion and reduce your R-factor.

[davidz71]

I could only find 1/2" foil bubble insulation so I bought a large roll. Question is, do I staple the first sheet across from frame rail to frame rail then fold it back and forth so that it takes up the rest of the space on top of the belly pan or what?

[davidz71]

Originally Posted by thecatsandi

I would replace with an insulation that does not absorb and hold water. A closed cell foam or the foil buble stuff. The water will cause future corrosion and reduce your R-factor.

Thanks Michelle,
I went ahead with the foil bubble. I also did a search (should have done one in the first place) and found where several individuals had used the foil bubble stuff, one using baffles of styrofoam of some type for dead air space. I started with waterproof construction adhesive on the board and stapled a first layer on. I then ran a length of figure eights back and forth to create dead space in between each layer. I'm going out now to rivet the belly pan back in place, dipping each rivet in POR15 rather than in Trempro 635. My next job tonight will be to hit the particle board with a Stop-Rot to prevent further degradation of the board and then Trempro 635 a couple areas where I think the water has been getting in.