Incorrectly installed spray foam remediation?
During a major remodel with the house vacated open cell Demilec APX was applied under the roof sheathing to create a conditioned attic. A Demilec rep was on site for three days. A strong odor remained for months. A different Demilec rep sent a sample of foam to their lab. Results were it wasn't applied thick enough, so it lacked the exothermic reaction to properly off gas in 72 hours or less.. The installers acknowledged the problem, pulled (48 days after application) the new ceiling drywall and removed +90% of the foam. During removal I kept foam samples and had it tested by Eurofins. The VOC test of the foam resulted in extremely high levels of diethyl ethanephosphonate. After the removal the odor was less, but still present. For another month the house was ventilated with large squirrel cage fan. This helped, however the odor was still present on +70 degree days with sun heating the roof. Four months after application the attic air quality was tested. The results from Eurofins were the diethyl ethanephosphonate remained moderately high.
Demilec says spray over with closed cell foam, but won't guarantee it will work. That is the extent of support from Demilec. It seems next to impossible to totally encapsulate the Demilec APX overspray on the trusses, duct insulation, electrical romex, pex pipe, and drippings.
Since the off gassing didn't occur within a few days what building products have absorbed this odor? From Demilec's own wesite; If not adequately ventilated during and shortly after application, the odors can be absorbed in adjacent materials such as fibrous insulation, wood framing and household or stored items.
1. Are there any "proven" methods to re-mediate this problem with case studies?
2. What professional should be hired to evaluate and determine the proper methods of remediation? It would be best that this person is knowledgeable and experienced in spray foam remediation.
Thanks for all your input!
Posted Wed, 01/29/2014 - 15:51
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