Planning to glue engineered over concrete using Titebond 771. I'm planning to use a 1/4" x 3/16 v notch so I can avail of the moisture control. I was planning to use planipatch to fill the low spots but Mapei today told me I cant use Planipatch in this instance, huh? They say if I intend to use a the 771 as an adhesive AND a vapor membrane(which I do) I must use an exterior grade patch such as there Mapecem Quick patch. If I wanted to use the 771 as an adhesive only then planipatch is ok.

I borrowed a Tramex moisture reader today and had readings from 2.5lbs to 5lbs over a 800" area. Has anybody come across this before??