Don Phillipson wrote:
Time to patch the parging again, and the places
where the insulation shows through seem bigger than
ever before, some 10 inches by 2 or more.

I have plenty of PolyCement so can make it to be as
sticky as workable. But would it stick better if I
tried to reinforce by laying pieces of nylon flyscreen
underneath the parging?

Don Phillipson
Carlsbad Springs
(Ottawa, Canada)

I don't know how thick your parging needs to be, but when I repaired the
parging on the block wall of my garage, I attached galvanized diamond mesh
lath like shown in the link below.

I attached it to the block with TapCons and washers.

http://findnsave.theolympian.com/Pro...mond-Mesh-Lath