Replies

1. 
   DanH | Nov 30, 2007 03:25pm | #1

   So long as the inside vapor barrier is tight that arrangement wouldn't cause problems in any non-tropical environment. In the PNW, if you're sufficiently coastal that you rarely see temps into the single digits, that goes double -- condensation inside the insulation is really only a problem below 10F or so.

   In the PNW, though, you definitely want the stapping over the outside foam (and maybe over a layer of housewrap) before siding, to create a rainshield drain plane.

   If your view never changes you're following the wrong leader
1. 
   barcode | Nov 30, 2007 06:47pm | #2

   another question?

    

   Do I need to remove the existing tar paper? or can it be left in place?

   What is the best way to attach the ridgid foam?

   Do I need tar paper over the foam?

    

   And the plot thickens

   The siding I have is 1x8 shiplap (vertical) so I was going to attach the stapping horizontaly.

   Would this affect the drain plane behind the siding?

   Suggestions?

    

1. 
   DanH | Nov 30, 2007 08:34pm | #3

   My main suggestion would be to not use vertical shiplap in a rainy environment. If you do you should probably use one of the available rainshield products.
   If your view never changes you're following the wrong leader

1. 
   barcode | Nov 30, 2007 11:19pm | #4

   Funny, that's what I thought too.

   but when you get materials for next to nothing. you gotta compromise.

   and it matchs the house.

    

   now whats the best way to attach building paper to this stuff?

    

   I have images of Huge dents from a hammer tacker?