I would either damp spray cellulose or install the interior drywall and then blow it. Problem is that you are doing it blind but if well documented before drywall, it should still be able to be done properly.
Thanks to all that replied. It is an exterior basement wall. We don't get to decide how it is built, we just get to insulate it. We have decided to blow these cavities after the drywall is hung. They are installing 2" Blue Board against the foundation then installing steel studs 1/2" in from the Blue board. We will blow these from the top or use a hole saw to cut through the drywall and replace the plug if necessary.
Larry Janesky, owner and founder of Dr. Energy Saver is once again On the Job insulating and finishing a basement in the northeast – and introducing a brand new insulation product: ThermalDry Insulated Floor Decking.
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Rebroadcast from On April 30, 2013 Sharon Miller and Robin Utz of the U.S. Department of Education conducted a one hour webinar for HVACR educators to provide them firsthand information from Washington.
* A blueprint to revise…