Norm Abram and Bob Vila appearance on David Letterman

On March 25th 1987, Norm and Bob stop by the David Letterman show to show David how to build to screen panels. Norm does most of the work while Bob and David try to help him.

On March 25th 1987, Norm and Bob stop by the David Letterman show to show David how to build to screen panels. Norm does most of the work while Bob and David try to help him.