Closed Cell Foam in Old Wall Assembly
Can someone point me at the rules for using foam on a wall assembly? My contractor came to spray the ceiling (finally!), it all went well there, however he also sprayed 4″ closed cell HFO foam in a small section of a 2×4 wall. The wall assembly is “old” stucco + tar paper adhered to shiplap. See the attached section.
I’m concerned about moisture now since this wall cannot dry to the interior. Do I need to ask the contractor to remove this small section? See photo below.
Is there any risk to the exterior stucco or shiplap?
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