Small patch silicone

how will you stop a 300 x 300 repaired hole in a rendered wall from cracking, I'm assuming the hole goes right through the wall,
 
how will you stop a 300 x 300 repaired hole in a rendered wall from cracking, I'm assuming the hole goes right through the wall,
A vent cover Is a good call but but if can't be used, if concerned about shrinkage, then make the radius slightly bigger, knock skim coat back to mesh, use rendaid as base coat with new larger piece of mesh trowled in.
 
Surely not scaffolders? They're far too careful of others work to do any damage.
Did a shop, looked like Spider-Man had been crawling around the walls, black handprints all up the Gable,
Boss said it was the lad he had been soaking the fittings in diesel on the morning,
Borstal's only educational program was scaffolding I'm sure of it.
 
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