Having the floor insulating material wrap around the fastener is a
problem I was concerned with, so a punch should be in my toolbox. A
lot of potentials in the posts here. Thanks for the response. I will
check into the suggested sources.

Gary Brady wrote:


If the sound deadening material or mat is made of fibrous material,
like
carpet, you may have a problem with the drill screw winding up the
fibers or yarn. This occurs when you try to drill through carpet.
You
may have to cut the sound deadening material with a round punch
before
drilling.

Gary Brady
Austin, TX