Liquid-applied WRB in an attic?
I have an upcoming project on several older buildings to abate asbestos containing vermiculite, used as loose insulation in the attics.
Basically, the contractor vacuums out the vermiculite, and as the final part of the abatement process sprays a sealer over interior of the attic, to immobilize any remaining asbestos.
I was wondering if I could specify that the contractor apply a Liquid Applied WRB on the interior of the attic, and then install an R42 blow in insulation.
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First of all, I hope that you are using a certified asbestos abatement contractor. Asbestos is a serious health threat.
If you are using a certified abatement contractor, you shouldn't suggest any changes to the abatement procedure. If the contractor uses a proprietary sealer to limit asbestos dangers, that's exactly the product that should be used. Don't try to substitute a product that the abatement contractor is unfamiliar with.
For more information on this topic, see Fixing Attics With Vermiculite Insulation.