How do I contain acoustical sealant toxity?
Acoustical sealant was applied to tu-tuff as the vapor barrier for our crawl space.
This was phase one before going to phase two which would be use the supply and return
air sources to ventilate the area. The sealant was only used to adhere the vb to the concrete foundation wall. The sealant is superior becomes it does not dry out; hence, it maintains a seal
for radon remediation as well as a vb.
THE issue, though, is that the sealant is toxic and does not cure. The installer actually became ill and had to quit on day one. He returned to finish the job, but not very happy. At this point, I am awaiting his return to use maximum strength duck tape to seal the vb perimeter against the foundation. He started but ran out of tape.
Meanwhile, five days later, the vapors are still very strong. The laundry area adjoins and my wife reports feeling a loopie if she remains too long.
I stepped this one thinking that I was doing the right thing. I guess being “green” does not necessarily mean being safe. At this point I think that I may need to abandon the application of theory that says to treat your crawl space as your home and abdicate to the competing theory which calls for treating it more like your attic—insulate it away from the living space and provide ventilation.
Any suggestions? Is there a proven method of having an exhaust fan at one of the crawl space and a passive vent at the other. The downside is that the crawlspace will no be open to extreme temperatures and humidity. We live in northern Kentucky area.
Being more optimistic….does the sealant stop off gassing after a few weeks?