Too often, a property owner thinks a plaster wall cannot be repaired properly without leaving signs of damage but that is not the case. Certainly, plaster wall crack repairs can be difficult to fix but the keys to act at the first sign of problems much like rust on an automobile.
Plaster vs. Drywall
With drywall, it is often more expedient to rip out entire sections and replace with large sheets.
Though a difficult material to work with, drywall offers some advantages over plaster when it comes to crack repairs. It is possible to remove only the section that needs fixing (plus a few inches beyond), without the entire wall collapsing. The other advantage with crack repairs is that drywall has no backing. Once you cut through drywall, there is nothing behind it except for studs and insulation. It all removes in one layer.
By contrast, plaster walls are made of two layers: the outer plaster and the inner wooden lath.
With plaster, it’s far more advisable to preserve whatever is there and repair that, as opposed to tearing it out which can soon become a never-ending process as one section leads to another.