Odor from Fire-Retardant Paint Applied Over Spray Foam
I’m an architect & designed a 2 story addition to a house 2 years ago. I just got a call from the homeowner about some trouble he’s been experiencing since it was built. I’ve never heard of this problem before & would appreciate any advice.
Rafters were insulated with open cell spray foam to create a conditioned space since an air handler & gas fired furnace are in the attic. A fire retardant paint was then applied over the spray foam. The paint odor was very bad at first & the owner was told the smell would subside….but it hasn’t in 2 years & is especially strong in summer. The odor is getting into the HVAC system & into the bedrooms below, which is a problem.
The HVAC installer says the mechanical equipment is sweating in the attic since there’s no air circulation & recommends ventilation, but I disagree….kind of defeats the concept of a conditioned attic.
I don’t know what was used for the fire retardant paint, but that seems to be the culprit. Has anyone else experienced anything similar?
Thanks in advance…..
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