What should I use to insulate the floor?

[mswartz]

Malcolm,
With your floor removal underway, have you made any decisions on how you will insulate and ventilate the under-floor volume as you discussed in thread 11881 about 13 years ago?
My 2001 Bambi has a new uprated Dexter axle, and I need to decide on the insulation/ventilation system to use before replacing the belly pan material. My floor and frame are in good shape, but the old fiberglas insulation was completely removed.
I'm considering a 2-in thick rigid foam mounted to the floor with standoffs and formed to allow 3/4in air space, and provide for condensation or water drainage to the bellypan. I likely will plan to use a small grid vent in each floor section bellypan segment, similar to a soffit vent, to assure sufficient drainage while minimizing air flow and blocking insects and vermin from entering.
Any thoughts or considerations you could provide would be welcome.
And best of luck on your restoration project.

[rowdyATX]

Originally Posted by silver suz

We used Denny foil in our house that has solid wood flooring. Denny foil is aluminum foil backed by kraft paper. we taped the roll sections together with the tape you mentioned. The wood was solid and stapled together at an angle with a nail gun. It's worked for almost 11 years, (the rest of the house is tile.) It is also used in all the walls and ceilings. (which is why a cell phone doesnt work in here.) We are going to do the same thing in the trailer. A 3/8ths inch gap caused by the furring strips is an excellent heat/cold barrier, as long as there are no leaks. For under neath you should use the foil double backed that has tiny perforations to let the material "breathe".

This has given me the energy to open the two boxes sitting in the hall. We decided this time to use a heavier product that is about the thickness of a telephone cover book. Heavier aluminum on both sides with the kraft paper in between not perforated. This is used to create barriers with the foil tape between the person inside and any insulation smells etc walls, floors ceiling etc. The width is 48-52?" and as long a roll as you want. We got it from I think healthy-homes.com the seattle based one healthy.homes.com? Some combination of that sliver suz

Thanks for your comments. Can you provide a link or give details for subfloor insulation and wall/ceiling insulation? Thanks!!

[BigAl]

You guys realize this thread is 13 years old!