Spray foam prep for inside and underebody

[-cycosis-]

About to get spray foam insulation installed. For those who have done it, what did you do to prep the inside/underside of your bus? Anything you wish you did differently? What did you do about the hollow areas of your structural ribs? Did you try to get any injected into the support truss under the bus as well?

Anyone experience the foam not setting and off gassing?

[Timber.Craftsman]

Cycosis, did you end up doing this? What was your experience? Re:your questions...?

[-cycosis-]

It turned out great! I dont know if the mods want to relocate this thread to the tutorial section but I will relay my experience below.

Prep! Mask off anywhere you dont want foam. I mean everywhere! Windows, upholstery, any metal bulkhead, heaters, dash board.

This is the most important recommendation:

For the ribs of the roof and below the windows, you want to cover them in clear packing tape. NOT masking tape. When the foam is cured (mine did pretty much instantly), you can pull on an edge of the packing tape and it will pull off the foam strip fairly easily in one piece to reveal the entire clean metal rib underneath. Super easy for post spray clean up.

Masking tape is not as strong and will tear far too easily and you have to chip the foam off. Its a lot more work.

Use an exacto knife/box cutter with the blade at full extension to shave off the overspray or areas that are thicker than your ribs.

You can see my bus in my build thread with the how the foam turned out. http://www.skoolie.net/forums/f11/lo...e-14005-5.html

[EastCoastCB]

Good to know on the tape for masking.
Did either of you prime the metal?

[Famousinternetjesus]

So you mentioned injecting foam into the hollow ribs etc. did you end up doing that? And if so, what product did you use and all that good stuff.

[-cycosis-]

No nothing was injected into ribs. But thermal transfer a certainly a very significant thing. It was neat. By mid day, the wall pan el was cool to the touch but the wall ribs were quite warm due to the sun hitting the side of the bus.