Replies

1. 
   Gabe_Martel | Jun 23, 1999 05:10am | #1

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   Hi Tedd,

   Not a good idea.

   The intense temperature changes will play havoc with the poly.

   Gabe

1. 
   tedd | Jun 23, 1999 08:03am | #2

   *Ok, I'll drop the poly for a better quality membrane. I gather that a rigid surface is not critical.Actually, this pole barn will have inside gyprock walls. Can I get the same R value with a lower density of Cell ?Can I reverse your approach and use the Par Pac or Tu Tuf on the outside instead of tar paper - sandwiched between purlins and rafters ?I didn't realize that the high density Cell was primarily for air sealing. I thought it was for inside cavity, convection minimuzation and keeping insultation absorbed, air born moisture and in-all condensation off the frame.Tedd

1. 
   Gabe_Martel | Jun 23, 1999 05:10pm | #3

   *Hi Tedd,Your biggest headache with a pole shed that's covered with a tin roof is leaking over time. As the tin works, the fasteners loosen and water will enter.My insulation of choice for this type of application is SM. It has a higher R rating per inch and is not affected by leaks or moisture.Gabe

2. 
   tedd | Jun 24, 1999 06:25am | #4

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   Hi gents ...

   Working on pole barn that will get a steel roof and walls over 2 x 4 purlins. We want to insulate it with DP Cell.

   We don't need structural sheathing so I am wondering if a heavy duty, non-tearing poly (under purlins) could serve as the outside cavity membrane for the DP Cell ? If this can work, what's the best O.C. spacing for purlins ?

   Is this flexible membrane a crazy idea ? And, if so, what are my options to satisfy the DP Cell requirements for a rigid membrane at minimum addition of material costs?

   tedd