Repairing render that has failed
Render fails in the same few ways: hairline cracks that let rain in, hollow patches where it has come away from the wall, and crumbling at the base where the wall stays wet. We tap-test the whole elevation, mark what has come away, and cut back to sound render.
The patch is built up in coats to match the thickness and texture of what is there, then the wall is painted so the repair does not show. If most of the wall is hollow, we say so and price re-rendering it whole.




