Continuous rigid foam at the Jersey shore
I am currently designing a new single family vacation home in southern New Jersey on the beach. The project is going for LEED for Homes and Energy Star certifications. My main wall section from inside-out calls for 1/2" gypsum, 2x6 stud wall w/ batt insulation, 1/2 plywood, 1-1/2" rigid foam, WRB, 1x4 furring/air space, fiber cement siding. Air sealing details are similar to those offered in the GBA detail library. As a summer vacation home the main usage would be during the cooling season.
My contractor has expressed concern for this wall section because he claims to have built a similar assembly in the 90's which resulted in major mold and moisture damage due to the coastal climate in the summer. Further details about that installation are lacking but it still has me concerned.
Does this wall section have any flaws I am missing that might lead to moisture damage or long term durability concerns?
Any suggestions or reassurances about my strategy?
Also, what would be the appropriate type of rigid foam?
Any help would be much appreciated.
Posted Jul 30, 2014 7:47 PM ET
Edited Jul 31, 2014 4:00 AM ET
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