? under aluminum skin

[bobnlyd]

getting ready to skin my trailer (finally). should i put a barrier in between the skin and the sheeting. i used 7/16" osb with reflective skin on the back (for heat and cold ) and 2x2 framing with 1 1/2" stryofoam insulation...1" plywood subfloor with 3/4" stryofoam insulation and 24ga galv seets as water barrier..roof is 1/4" luan with 1 1/2" insul also...was thinking a 30min building paper would help with any moisture issues

[George Taylor]

I just rolled on a few thick coats of spar varnish under the aluminum.

[48Rob]

Most people don't...but many vintage trailer manufacturers did use builders paper between the framing and aluminum skin.

Rob

[citylights]

I would paint as a just in case waterproof and wood preservative.

[bobnlyd]

ended up with 30min paper under and just ordered the epdm for the roof...finishing the doors up this weekend...trying to finish for spring fishing