Metal Roof - OSB or Bubble Insulation?

[MagKarl]

Planning a pole barn. Assuming soffit and ridge vents. No ceiling/attic. I am paranoid about condensation/dripping. I am not planning to insulate other than what is necessary to keep the inside dry.

Is the bubble insulation sufficient, or would OSB and felt be worth the additional expense?

 

[larry_g]

http://metalbuildinginsulation.com/insulation-options.html

I have used the 2" insulated vapor barrier like linked above. I have it in two shops fully wrapping the building walls and roof. I have no problems with moisture. If you are going to heat and ac the building then this 2" may not be your answer but it works for me as I don't heat all the time. It is also a fair sound barrier in the rain. I do not have soffit or ridge vents. I believe you only need that if you have attic space/insulated ceiling.

lg
no neat sig line

 

[Leaflessshadetree]

I bought sheets with a condenstop coating for my roof. Should find out how well it works in a few weeks.

 

[rburke65]

I did OSB and the "approved" under layment. No problems.

 

[bigsexy1985]

I would at least insolate the roof or it will rain in there buy 3inch vinyl backed from a metal building supply house for what you spend on osb and tar paper a little more and your roof is done then come back in later on and buy 6 inch without vinyl backing and do the walls then osb over or reverse u panall pbi makes what im ref to good luck

 

[bigsexy1985]

O it can be orderd cut to length at no extra charge or comes in 104' length by 6 ' wide for bought 200 bucks

 

[bigsexy1985]

I would at least insolate the roof or it will rain in there buy 3inch vinyl backed from a metal building supply house for what you spend on osb and tar paper a little more and your roof is done then come back in later on and buy 6 inch without vinyl backing and do the walls then osb over or reverse u panall pbi makes what im ref to good luck. O and the double bouble stuff ***** it will shed the wAter like a roof

 

[MagKarl]

Good link larry_g, thanks. Also carries weight that you are in the same region/climate and are happy with what you have.