A foreman said my head joints were "painted on, not packed" and I've been buttering both sides since
Ran a 28 foot wall in Amarillo and he tapped a joint with his trowel, hollow sound, said I was sliding brick instead of laying it. Started buttering the whole frog plus both head faces and got full mortar squeeze out on the next course. Now my walls eat about a third more mortar but I've stopped getting callbacks for cracks. Anyone else get taught to butter one side or is it both sides where you're at?