Scott,

Yourself or any other inspector who observes any termite drill holes not patched ought to make a note of them on your report. I don't care if your not a Licensed Pest control operator or not. Call it out.

First of all, any termiticide on the market recommends that the drill holes be patched. If they are not patched water can enter into them and cause the chemical to break down and not be effective.

I've seen some patio's actually have upheaval from rain water draining into these openings for a long period of time and cause the soil to swell and lift the patio causing cracks.

Main thing is that label states they (holes) should be patched. The most important rule they teach in Pest control is FOLLOW THE LABEL DIRECTIONS.

rick