Dear James: I have an old house with plaster walls and many cracks that need to be repaired. How can I fix these so they stay fixed and are invisible? — Julianne T. Dear Julianne: Many older houses ...

A modern repair/patching approach utilizes modern gypsum-based material. You cut a drywall patch, screw it to the lath, and apply a plaster bonding agent like Plaster Weld to prep the surface. You may ...