Replies

1. 
   Piffin | May 16, 2003 06:25am | #1

   In most places, the vapor bar to the inside is correct.

   Joe Lsitubrek (sp?) at building science has been at the forefront of a new understanding of this tho. His theroies, as I understand them, are that since a warm humid climate such as yours requires the vapor bar on the outside.

   Reasoining is that since homes nowadays are airconditioned, the humidity moves from warm wet space (outside) to dry cool space and possibly - according to conditions present - condenses at some place along the way. This is thew opposite of northern climates where warm air in winter moves moisture towards the outside and creates a possibility of condensation where it hits cold spots. The ionterior VB keeps the moisture out of the walls there.

   So in your case, as the theory goes, the VB on the outside keeps the humidity from getting trapped in the wall where it can cause molds.

   I don't live in the south anymore so I can't testify to p[ersonal knowledge but the idea makes some sense.

   .

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