You mention if the house moves the cracks reappear. Why are you fixing cracks if the house isn't fixed first? It is hopeless right? Or so you're leading this guy to believe. I love it when people use fiberglass thinking it's better, guarantees some crack fixing work in the next year or so. You say "I have patched over so many taped cracks", are you fixing the house so it won't move any more before you "repair" the cracks?